SN74HCS594D [TI]
SN74HCS594 8-Bit Shift Register With Schmitt-Trigger Inputs and Output Registers;
| 型号： | SN74HCS594D |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | SN74HCS594 8-Bit Shift Register With Schmitt-Trigger Inputs and Output Registers |
| 文件： | 总35页 (文件大小：2771K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN74HCS594
SCLS839A – OCTOBER 2020 – REVISED MAY 2021
SN74HCS594 8-Bit Shift Register With Schmitt-Trigger Inputs and Output Registers
1 Features
3 Description
•
•
Wide operating voltage range: 2 V to 6 V
Schmitt-trigger inputs allow for slow or noisy input
signals
Low power consumption
– Typical ICC of 100 nA
– Typical input leakage current of ±100 nA
±7.8-mA output drive at 6 V
Extended ambient temperature range: –40°C to
+125°C, TA
The SN74HCS594 device contains an 8-bit, serial-in,
parallel-out shift register that feeds an 8-bit D-type
storage register. All inputs include Schmitt triggers,
eliminating any erroneous data outputs due to slow-
edged or noisy input signals. The storage register has
parallel outputs. Separate clocks and direct overriding
clear (SRCLR, RCLR) inputs are provided for both
the shift and storage register. A serial output (QH') is
provided for cascading.
•
•
•
Both the shift register (SRCLK) and storage register
(RCLK) clocks are positive edge triggered. If both
clocks are connected together, the shift register is one
count pulse ahead of the storage register.
2 Applications
•
•
•
•
Output expansion
LED matrix control
7-segment display control
8-bit data storage
Device Information
PART NUMBER
SN74HCS594PW
SN74HCS594D
PACKAGE(1)
TSSOP (16)
SOIC (16)
BODY SIZE (NOM)
5.00 mm × 4.40 mm
9.90 mm × 3.90 mm
3.60 mm x 2.60 mm
4.20 mm x 2.00 mm
SN74HCS594BQB
SN74HCS594DYY
WQFN (16)
SOT-23-THN
(16)
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Supports Slow Inputs
Low Power
Noise Rejection
Input Voltage
Waveforms
Time
Input Voltage
Time
Standard
CMOS Input
Response
Waveforms
Time
Time
Input Voltage
Schmitt-trigger
CMOS Input
Response
Waveforms
Time
Time
Input Voltage
Benefits of Schmitt-trigger inputs
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
SN74HCS594
SCLS839A – OCTOBER 2020 – REVISED MAY 2021
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Table of Contents
1 Features............................................................................1
2 Applications.....................................................................1
3 Description.......................................................................1
4 Revision History.............................................................. 2
5 Pin Configuration and Functions...................................3
6 Specifications.................................................................. 4
6.1 Absolute Maximum Ratings ....................................... 4
6.2 ESD Ratings .............................................................. 4
6.3 Recommended Operating Conditions ........................4
6.4 Thermal Information ...................................................4
6.5 Electrical Characteristics ............................................5
6.6 Timing Characteristics ................................................5
6.7 Switching Characteristics ...........................................6
6.8 Operating Characteristics .......................................... 7
6.9 Typical Characteristics................................................8
7 Parameter Measurement Information............................9
8 Detailed Description......................................................10
8.1 Overview...................................................................10
8.2 Functional Block Diagram.........................................10
8.3 Feature Description...................................................10
8.4 Device Functional Modes..........................................12
9 Application and Implementation..................................13
9.1 Application Information............................................. 13
9.2 Typical Application.................................................... 14
10 Power Supply Recommendations..............................17
11 Layout...........................................................................17
11.1 Layout Guidelines................................................... 17
11.2 Layout Example...................................................... 17
12 Device and Documentation Support..........................18
12.1 Documentation Support.......................................... 18
12.2 Receiving Notification of Documentation Updates..18
12.3 Support Resources................................................. 18
12.4 Trademarks.............................................................18
12.5 Electrostatic Discharge Caution..............................18
12.6 Glossary..................................................................18
13 Mechanical, Packaging, and Orderable
Information.................................................................... 19
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision * (October 2020) to Revision A (May 2021)
Page
•
•
•
Added DYY Package to Device Information Table............................................................................................. 1
Added DYY Package pinout diagram and information to Pin Configuration and Functions............................... 3
Added DYY and BQB Package to Thermal Information table............................................................................ 4
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5 Pin Configuration and Functions
QB
1
VCC
16
QB
VCC
QA
1
2
3
4
5
6
16
QC
QD
QE
15
14
QC
QD
QE
QF
QG
QH
2
15 QA
SER
3
4
5
6
7
SER
14
13
13
12
11
10
9
RCLR
RCLR
RCLK
PAD
QF
QG
RCLK
12
11
10
SRCLK
SRCLK
SRCLR
QH
7
8
SRCLR
QH‘
GND
8
9
GND QH`
D, PW, or DYY Package
16-Pin SOIC, TSSOP, or SOT-23
Top View
BQB Package
16-Pin WQFN
Transparent Top View
Pin Functions
PIN
TYPE
NO.
DESCRIPTION
NAME
QB
1
2
Output
Output
Output
Output
Output
Output
Output
—
QB output
QC output
QD output
QE output
QF output
QG output
QH output
Ground
QC
QD
3
QE
4
QF
5
QG
6
QH
7
GND
QH'
8
9
Output
Input
Serial output, can be used for cascading
Shift register clear, active low
Shift register clock, rising edge triggered
Output register clock, rising edge triggered
Storage register clear, active low
Serial input
SRCLR
SRCLK
RCLK
RCLR
SER
QA
10
11
12
13
14
15
16
Input
Input
Input
Input
Output
—
QA output
VCC
Positive supply
The thermal pad can be connect to GND or left floating. Do not connect to any other signal
or supply.
Thermal Pad(1)
—
1. BQB package only.
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6 Specifications
6.1 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted)(1)
MIN
MAX
7
UNIT
V
VCC
IIK
Supply voltage
–0.5
Input clamp current(2)
VI < –0.5 V or VI > VCC + 0.5 V
VI < –0.5 V or VI > VCC + 0.5 V
VO = 0 to VCC
±20
±20
±35
±70
150
150
mA
mA
mA
mA
°C
IOK
IO
Output clamp current(2)
Continuous output current
Continuous current through VCC or GND
Junction temperature(3)
Storage temperature
TJ
Tstg
–65
°C
(1) Stresses beyond those listed under Absolute Maximum Rating may cause permanent damage to the device. These are stress
ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated
under Recommended Operating Condition. Exposure to absolute-maximum-rated conditions for extended periods may affect device
reliability.
(2) The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
(3) Guaranteed by design.
6.2 ESD Ratings
VALUE
UNIT
Human-body model (HBM), per ANSI/ESDA/
JEDEC JS-001(1)
±4000
V(ESD)
Electrostatic discharge
V
Charged-device model (CDM), per JEDEC
specification JESD22-C101(2)
±1500
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.
6.3 Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
MIN
2
NOM
MAX
6
UNIT
V
VCC
VI
Supply voltage
Input voltage
5
0
VCC
VCC
125
V
VO
TA
Output voltage
Ambient temperature
0
V
–40
°C
6.4 Thermal Information
SN74HCS594
THERMAL METRIC(1)
PW (TSSOP)
16 PINS
D (SOIC)
16 PINS
BQB (WQFN)
16 PINS
DYY (SOT)
16 PINS
UNIT
Junction-to-ambient thermal
resistance
RθJA
141.2
78.8
85.8
27.7
85.5
122.2
80.9
80.6
40.4
80.3
108.4
77.3
74.4
12.6
74.5
186.2
109.1
111.0
18.0
°C/W
°C/W
°C/W
°C/W
°C/W
Junction-to-case (top) thermal
resistance
RθJC(top)
Junction-to-board thermal
resistance
RθJB
Junction-to-top characterization
parameter
ΨJT
Junction-to-board characterization
parameter
ΨJB
110.9
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SN74HCS594
THERMAL METRIC(1)
PW (TSSOP)
16 PINS
D (SOIC)
BQB (WQFN)
16 PINS
DYY (SOT)
16 PINS
UNIT
16 PINS
Junction-to-case (bottom) thermal
resistance
RθJC(bot)
N/A
N/A
54.3
N/A
°C/W
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report.
6.5 Electrical Characteristics
over operating free-air temperature range; typical values measured at TA = 25°C (unless otherwise noted).
PARAMETER
TEST CONDITIONS
VCC
MIN
0.7
1.7
2.1
0.3
0.9
1.2
0.2
0.4
0.6
TYP
MAX UNIT
2 V
1.5
VT+
Positive switching threshold
4.5 V
6 V
3.15
4.2
1.0
2.2
3.0
1.0
1.4
1.6
V
V
V
V
V
2 V
VT-
Negative switching threshold
Hysteresis (VT+ - VT-)(1)
High-level output voltage
Low-level output voltage
4.5 V
6 V
2 V
ΔVT
VOH
VOL
4.5 V
6 V
IOH = -20 µA
VI = VIH or VIL IOH = -6 mA
IOH = -7.8 mA
2 V to 6 V
4.5 V
6 V
VCC – 0.1 VCC – 0.002
4.0
5.4
4.3
5.75
0.002
0.18
0.22
±100
0.1
IOL = 20 µA
2 V to 6 V
4.5 V
6 V
0.1
0.30
0.33
VI = VIH or VIL IOL = 6 mA
IOL = 7.8 mA
II
Input leakage current
Supply current
VI = VCC or 0
6 V
±1000 nA
ICC
Ci
VI = VCC or 0, IO = 0
6 V
2
5
µA
pF
Input capacitance
2 V to 6 V
(1) Guaranteed by design.
6.6 Timing Characteristics
CL = 50 pF; over operating free-air temperature range (unless otherwise noted). See Parameter Measurement Information.
Operating free-air temperature (TA)
PARAMETER
VCC
25°C
MIN
–40°C to 125°C
UNIT
MAX
32
MIN
MAX
2 V
17
54
68
fclock
Clock frequency
Pulse duration
4.5 V
6 V
100
115
2 V
8
6
6
7
6
6
12
7
SRCLK or RCLK
high or low
4.5 V
6 V
7
tw
ns
2 V
12
7
SRCLR or RCLR
low
4.5 V
6 V
7
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CL = 50 pF; over operating free-air temperature range (unless otherwise noted). See Parameter Measurement Information.
Operating free-air temperature (TA)
PARAMETER
VCC
25°C
MIN
–40°C to 125°C
UNIT
MAX
MIN
16
7
MAX
2 V
11
4
SER before
SRCLK↑
4.5 V
6 V
4
5
2 V
15
5
24
9
SRCLK↑ before
RCLK↑
4.5 V
6 V
5
7
2 V
16
7
27
10
8
tsu
SRCLR low before
RCLK↑
Setup time
4.5 V
6 V
ns
5
2 V
5
9
SRCLR high
(inactive) before
SRCLK↑
4.5 V
6 V
3
5
3
4
2 V
8
12
5
RCLR high
(inactive) before
RCLK↑
4.5 V
6 V
4
3
4
2 V
0
0
th
Hold time
SER after SRCLK↑ 4.5 V
6 V
0
0
ns
0
0
6.7 Switching Characteristics
CL = 50 pF; over operating free-air temperature range (unless otherwise noted). See Parameter Measurement Information.
Operating free-air temperature (TA)
PARAMETER
FROM
TO
VCC
25°C
TYP
–40°C to 125°C
MIN TYP MAX
UNIT
MIN
32
MAX
2 V
17
54
68
fmax
Max switching frequency
4.5 V
6 V
100
115
MHz
2 V
19
7
30
11
9
45
17
12
45
17
12
55
17
15
55
17
15
16
9
SRCLK
RCLK
QH'
4.5 V
6 V
6
tpd
Propagation delay
ns
2 V
19
7
30
11
9
QA - QH
4.5 V
6 V
6
2 V
18
7
27
11
9
SRCLR
RCLR
QH'
4.5 V
6 V
6
tPHL
Propagation delay
ns
ns
2 V
18
7
27
11
9
QA - QH
4.5 V
6 V
6
2 V
9
tt
Transition-time
Any output 4.5 V
6 V
5
4
8
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6.8 Operating Characteristics
over operating free-air temperature range; typical values measured at TA = 25°C (unless otherwise noted).
PARAMETER
TEST CONDITIONS
VCC
MIN
TYP
MAX UNIT
Power dissipation capacitance
per gate
Cpd
No load
2 V to 6 V
40
pF
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6.9 Typical Characteristics
TA = 25°C
46
44
42
40
38
36
34
32
30
28
26
70
65
60
55
50
45
40
35
30
VCC = 2 V
VCC = 3.3 V
VCC = 4.5 V
VCC = 6 V
VCC = 2 V
VCC = 3.3 V
VCC = 4.5 V
VCC = 6 V
0
2.5
5
7.5 10 12.5 15 17.5 20 22.5 25
Output Sink Current (mA)
0
2.5
5
7.5 10 12.5 15 17.5 20 22.5 25
Output Source Current (mA)
Figure 6-1. Output driver resistance in LOW state. Figure 6-2. Output driver resistance in HIGH state.
0.2
0.18
0.16
0.14
0.12
0.1
0.65
0.6
VCC = 2 V
VCC = 4.5 V
VCC = 5 V
VCC = 6 V
0.55
0.5
VCC = 2.5 V
VCC = 3.3 V
0.45
0.4
0.35
0.3
0.08
0.06
0.04
0.02
0
0.25
0.2
0.15
0.1
0.05
0
0
0.5
1
1.5
2
2.5
3
3.5
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
VI œ Input Voltage (V)
VI œ Input Voltage (V)
Figure 6-3. Supply current across input voltage, 2-,
2.5-, and 3.3-V supply
Figure 6-4. Supply current across input voltage,
4.5-, 5-, and 6-V supply
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7 Parameter Measurement Information
Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators
having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tt < 2.5 ns.
For clock inputs, fmax is measured when the input duty cycle is 50%.
The outputs are measured one at a time with one input transition per measurement.
tw
Test
Point
VCC
0 V
Input
50%
50%
From Output
Under Test
Figure 7-2. Voltage Waveforms, Pulse Duration
(1)
CL
(1) CL includes probe and test-fixture capacitance.
Figure 7-1. Load Circuit for Push-Pull Outputs
VCC
VCC
Clock
Input
50%
Input
Output
Output
50%
50%
0 V
0 V
VOH
VOL
VOH
VOL
(1)
(1)
tPLH
tPHL
tsu
th
VCC
Data
Input
50%
50%
50%
50%
0 V
(1)
(1)
Figure 7-3. Voltage Waveforms, Setup and Hold
Times
tPHL
tPLH
50%
50%
(1) The greater between tPLH and tPHL is the same as tpd
.
Figure 7-4. Voltage Waveforms Propagation Delays
VCC
90%
Input
90%
10%
0 V
10%
tr(1)
tf(1)
VOH
90%
90%
Output
10%
10%
VOL
tr(1)
tf(1)
(1) The greater between tr and tf is the same as tt.
Figure 7-5. Voltage Waveforms, Input and Output Transition Times
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8 Detailed Description
8.1 Overview
The SN74HCS594-Q1 is an 8-bit shift register that feeds an 8-bit D-type storage register. Both the shift register
clock (SRCLK) and storage register clock (RCLK) are positive-edge triggered. If both clocks are connected
together, the shift register always is one clock pulse ahead of the storage register. All inputs include Schmitt-
triggers allowing for slow input transitions and providing more noise margin.
8.2 Functional Block Diagram
13
RCLR
12
RCLK
10
SRCLR
11
SRCLK
14
Q
SER
D
R
D
R
15
Q
QA
D
R
Q
D
R
1
Q
QB
2
3
4
5
6
QC
QD
QE
QF
QG
D
R
Q
D
R
7
9
Q
QH
QH‘
Figure 8-1. Logic Diagram (Positive Logic) for SN74HCS594
8.3 Feature Description
8.3.1 Balanced CMOS Push-Pull Outputs
This device includes balanced CMOS push-pull outputs. The term "balanced" indicates that the device can sink
and source similar currents. The drive capability of this device may create fast edges into light loads so routing
and load conditions should be considered to prevent ringing. Additionally, the outputs of this device are capable
of driving larger currents than the device can sustain without being damaged. It is important for the output power
of the device to be limited to avoid damage due to overcurrent. The electrical and thermal limits defined in the
Absolute Maximum Ratings must be followed at all times.
Unused push-pull CMOS outputs should be left disconnected.
8.3.2 CMOS Schmitt-Trigger Inputs
This device includes inputs with the Schmitt-trigger architecture. These inputs are high impedance and are
typically modeled as a resistor in parallel with the input capacitance given in the Electrical Characteristics table
from the input to ground. The worst case resistance is calculated with the maximum input voltage, given in the
Absolute Maximum Ratings table, and the maximum input leakage current, given in the Electrical Characteristics
table, using Ohm's law (R = V ÷ I).
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The Schmitt-trigger input architecture provides hysteresis as defined by ΔVT in the Electrical Characteristics
table, which makes this device extremely tolerant to slow or noisy inputs. While the inputs can be driven much
slower than standard CMOS inputs, it is still recommended to properly terminate unused inputs. Driving the
inputs with slow transitioning signals will increase dynamic current consumption of the device. For additional
information regarding Schmitt-trigger inputs, please see Understanding Schmitt Triggers.
8.3.3 Clamp Diode Structure
The inputs and outputs to this device have both positive and negative clamping diodes as depicted in Electrical
Placement of Clamping Diodes for Each Input and Output.
CAUTION
Voltages beyond the values specified in the Absolute Maximum Ratings table can cause damage
to the device. The input and output voltage ratings may be exceeded if the input and output clamp-
current ratings are observed.
VCC
Device
+IIK
+IOK
Input
Output
Logic
GND
-IIK
-IOK
Figure 8-2. Electrical Placement of Clamping Diodes for Each Input and Output
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8.4 Device Functional Modes
Function Table lists the functional modes of the SN74HCS594.
Table 8-1. Function Table
INPUTS(1)
FUNCTION
SER SRCLK SRCLR RCLK
RCLR
X
X
L
X
X
↑
X
L
X
X
X
L
X
X
Shift register is cleared.
Shift register is cleared.
H
First stage of the shift register goes low.
Other stages store the data of previous stage,
respectively.
H
X
X
↑
X
↑
H
H
H
X
↑
X
X
X
First stage of the shift register goes low.
Other stages store the data of previous stage,
respectively.
First stage of the shift register goes high.
Other stages store the data of previous stage,
respectively.
↑
(1) H = High Voltage Level, L = Low Voltage Level, X = Don't Care
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9 Application and Implementation
Note
Information in the following applications sections is not part of the TI component specification,
and TI does not warrant its accuracy or completeness. TI’s customers are responsible for
determining suitability of components for their purposes, as well as validating and testing their design
implementation to confirm system functionality.
9.1 Application Information
In this application, the SN74HCS594 is used to control seven-segment displays. Utilizing the serial output and
combining a few of the input signals, this implementation reduces the number of I/O pins required to control the
displays from sixteen to four. Unlike other I/O expanders, the SN74HCS594 does not need a communication
interface for control. It can be easily operated with simple GPIO pins.
There is no practical limitation to how many SN74HCS594 devices can be cascaded. To add more, the
serial output will need to be connected to the following serial input and the clocks will need to be connected
accordingly. With separate control for the shift registers and output registers, the desired digit can be displayed
while the data for the next digit is loaded into the shift register.
At power-up, the initial state of the shift registers and output registers are unknown. To give them a defined state,
both registers need to be cleared. An RC can be connected to the SRCLR and RCLR pins as shown in the
Typical application block diagram to initialize the shift and output registers to all zeros.
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9.2 Typical Application
VCC
VCC
SRCLR
RCLR
Seven Segment
R1
C1
QA
QB
QC
QD
QE
QF
QG
QH
g
a
f
f
b
c
a
SER
b
DP
c
g
SRCLK
RCLK
MCU
e
d
e
d
DP
GND
QH‘
VCC
VCC
SRCLR
RCLR
Seven Segment
R2
C2
QA
QB
QC
QD
QE
QF
QG
QH
g
a
f
f
b
c
a
SER
b
DP
c
g
SRCLK
RCLK
e
d
e
d
DP
GND
QH‘
Figure 9-1. Typical application block diagram
9.2.1 Design Requirements
9.2.1.1 Power Considerations
Ensure the desired supply voltage is within the range specified in the Recommended Operating Conditions. The
supply voltage sets the device's electrical characteristics as described in the Electrical Characteristics.
The positive voltage supply must be capable of sourcing current equal to the total current to be sourced by all
outputs of the SN74HCS594 plus the maximum static supply current, ICC, listed in Electrical Characteristics and
any transient current required for switching. The logic device can only source as much current as is provided by
the positive supply source. Be sure not to exceed the maximum total current through VCC listed in the Absolute
Maximum Ratings.
The ground must be capable of sinking current equal to the total current to be sunk by all outputs of the
SN74HCS594 plus the maximum supply current, ICC, listed in Electrical Characteristics, and any transient
current required for switching. The logic device can only sink as much current as can be sunk into its ground
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connection. Be sure not to exceed the maximum total current through GND listed in the Absolute Maximum
Ratings.
The SN74HCS594 can drive a load with a total capacitance less than or equal to 50 pF while still meeting all of
the datasheet specifications. Larger capacitive loads can be applied, however it is not recommended to exceed
50 pF.
The SN74HCS594 can drive a load with total resistance described by RL ≥ VO / IO, with the output voltage and
current defined in the Electrical Characteristics table with VOH and VOL. When outputting in the high state, the
output voltage in the equation is defined as the difference between the measured output voltage and the supply
voltage at the VCC pin.
Total power consumption can be calculated using the information provided in CMOS Power Consumption and
Cpd Calculation.
Thermal increase can be calculated using the information provided in Thermal Characteristics of Standard Linear
and Logic (SLL) Packages and Devices.
CAUTION
The maximum junction temperature, TJ(max) listed in the Absolute Maximum Ratings, is an additional
limitation to prevent damage to the device. Do not violate any values listed in the Absolute Maximum
Ratings. These limits are provided to prevent damage to the device.
9.2.1.2 Input Considerations
Input signals must cross Vt-(min) to be considered a logic LOW, and Vt+(max) to be considered a logic HIGH. Do
not exceed the maximum input voltage range found in the Absolute Maximum Ratings.
Unused inputs must be terminated to either VCC or ground. These can be directly terminated if the input is
completely unused, or they can be connected with a pull-up or pull-down resistor if the input is to be used
sometimes, but not always. A pull-up resistor is used for a default state of HIGH, and a pull-down resistor is
used for a default state of LOW. The resistor size is limited by drive current of the controller, leakage current into
the SN74HCS594, as specified in the Electrical Characteristics, and the desired input transition rate. A 10-kΩ
resistor value is often used due to these factors.
The SN74HCS594 has no input signal transition rate requirements because it has Schmitt-trigger inputs.
Another benefit to having Schmitt-trigger inputs is the ability to reject noise. Noise with a large enough amplitude
can still cause issues. To know how much noise is too much, please refer to the ΔVT(min) in the Electrical
Characteristics. This hysteresis value will provide the peak-to-peak limit.
Unlike what happens with standard CMOS inputs, Schmitt-trigger inputs can be held at any valid value without
causing huge increases in power consumption. The typical additional current caused by holding an input at a
value other than VCC or ground is plotted in the Typical Characteristics.
Refer to the Feature Description section for additional information regarding the inputs for this device.
9.2.1.3 Output Considerations
The positive supply voltage is used to produce the output HIGH voltage. Drawing current from the output will
decrease the output voltage as specified by the VOH specification in the Electrical Characteristics. The ground
voltage is used to produce the output LOW voltage. Sinking current into the output will increase the output
voltage as specified by the VOL specification in the Electrical Characteristics.
Push-pull outputs that could be in opposite states, even for a very short time period, should never be connected
directly together. This can cause excessive current and damage to the device.
Two channels within the same device with the same input signals can be connected in parallel for additional
output drive strength.
Unused outputs can be left floating. Do not connect outputs directly to VCC or ground.
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Refer to Feature Description section for additional information regarding the outputs for this device.
9.2.2 Detailed Design Procedure
1. Add a decoupling capacitor from VCC to GND. The capacitor needs to be placed physically close to the
device and electrically close to both the VCC and GND pins. An example layout is shown in the Layout
section.
2. Ensure the capacitive load at the output is ≤ 50 pF. This is not a hard limit, however it will ensure
optimal performance. This can be accomplished by providing short, appropriately sized traces from the
SN74HCS594 to the receiving device(s).
3. Ensure the resistive load at the output is larger than (VCC / IO(max)) Ω. This will ensure that the maximum
output current from the Absolute Maximum Ratings is not violated. Most CMOS inputs have a resistive load
measured in megaohms; much larger than the minimum calculated above.
4. Thermal issues are rarely a concern for logic gates, however the power consumption and thermal increase
can be calculated using the steps provided in the application report, CMOS Power Consumption and Cpd
Calculation.
9.2.3 Application Curve
SER
QA
QB
QC
QD
QE
QF
QG
SER
QA
QB
QC
QD
QE
QF
QG
QH
QH
QH‘
QH‘
SRCLK rising edge shifts data
in the serial registers only
RCLK rising edge shifts data
to the output registers
Figure 9-2. Simplified functional diagram showing clock operation
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10 Power Supply Recommendations
The power supply can be any voltage between the minimum and maximum supply voltage rating located in the
Recommended Operating Conditions. Each VCC terminal should have a good bypass capacitor to prevent power
disturbance. A 0.1-μF capacitor is recommended for this device. It is acceptable to parallel multiple bypass caps
to reject different frequencies of noise. The 0.1-μF and 1-μF capacitors are commonly used in parallel. The
bypass capacitor should be installed as close to the power terminal as possible for best results, as shown in
given example layout image.
11 Layout
11.1 Layout Guidelines
When using multiple-input and multiple-channel logic devices inputs must not ever be left floating. In many
cases, functions or parts of functions of digital logic devices are unused; for example, when only two inputs of a
triple-input AND gate are used or only 3 of the 4 buffer gates are used. Such unused input pins must not be left
unconnected because the undefined voltages at the outside connections result in undefined operational states.
All unused inputs of digital logic devices must be connected to a logic high or logic low voltage, as defined by the
input voltage specifications, to prevent them from floating. The logic level that must be applied to any particular
unused input depends on the function of the device. Generally, the inputs are tied to GND or VCC, whichever
makes more sense for the logic function or is more convenient.
11.2 Layout Example
GND VCC
Recommend GNDflood fill for
improvedsignal isolation, noise
reduction, and thermal dissipation
Bypass capacitor
placedclose to
Unused inputs tieto GNDor VCC
thedevice
0.1 ꢀF
QB
QC
16
15
14
13
12
11
10
9
VCC
1
2
3
4
5
6
7
8
QA
QD
SER
QE
RCLR
RCLK
SRCLK
SRCLR
QH‘
QF
QG
QH
Avoid 90°
corners for
signal lines
GND
Unused output
left floating
Figure 11-1. Example layout for the SN74HCS594 in the PW package.
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12 Device and Documentation Support
TI offers an extensive line of development tools. Tools and software to evaluate the performance of the device,
generate code, and develop solutions are listed below.
12.1 Documentation Support
12.1.1 Related Documentation
For related documentation see the following:
•
•
•
Texas Instruments, HCMOS Design Considerations application report (SCLA007)
Texas Instruments, CMOS Power Consumption and Cpd Calculation application report (SDYA009)
Texas Instruments, Designing With Logic application report
12.2 Receiving Notification of Documentation Updates
To receive notification of documentation updates, navigate to the device product folder on ti.com. Click on
Subscribe to updates to register and receive a weekly digest of any product information that has changed. For
change details, review the revision history included in any revised document.
12.3 Support Resources
TI E2E™ support forums are an engineer's go-to source for fast, verified answers and design help — straight
from the experts. Search existing answers or ask your own question to get the quick design help you need.
Linked content is provided "AS IS" by the respective contributors. They do not constitute TI specifications and do
not necessarily reflect TI's views; see TI's Terms of Use.
12.4 Trademarks
TI E2E™ is a trademark of Texas Instruments.
All trademarks are the property of their respective owners.
12.5 Electrostatic Discharge Caution
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled
with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may
be more susceptible to damage because very small parametric changes could cause the device not to meet its published
specifications.
12.6 Glossary
TI Glossary
This glossary lists and explains terms, acronyms, and definitions.
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13 Mechanical, Packaging, and Orderable Information
The following pages include mechanical, packaging, and orderable information. This information is the most
current data available for the designated devices. This data is subject to change without notice and revision of
this document. For browser-based versions of this data sheet, refer to the left-hand navigation.
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PACKAGE OPTION ADDENDUM
www.ti.com
2-Jul-2021
PACKAGING INFORMATION
Orderable Device
Status Package Type Package Pins Package
Eco Plan
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
Samples
Drawing
Qty
(1)
(2)
(3)
(4/5)
(6)
SN74HCS594BQBR
SN74HCS594DR
ACTIVE
ACTIVE
WQFN
SOIC
BQB
D
16
16
16
16
3000 RoHS & Green
2500 RoHS & Green
3000 RoHS & Green
2000 RoHS & Green
NIPDAU
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Level-1-260C-UNLIM
Level-1-260C-UNLIM
-40 to 125
-40 to 125
-40 to 125
-40 to 125
HCS594
NIPDAU | SN
NIPDAU
HCS594
HCS594
HCS594
SN74HCS594DYYR
SN74HCS594PWR
ACTIVE SOT-23-THN
ACTIVE TSSOP
DYY
PW
NIPDAU | SN
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based
flame retardants must also meet the <=1000ppm threshold requirement.
(3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation
of the previous line and the two combined represent the entire Device Marking for that device.
(6)
Lead finish/Ball material - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead finish/Ball material values may wrap to two
lines if the finish value exceeds the maximum column width.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
2-Jul-2021
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
OTHER QUALIFIED VERSIONS OF SN74HCS594 :
Automotive : SN74HCS594-Q1
•
NOTE: Qualified Version Definitions:
Automotive - Q100 devices qualified for high-reliability automotive applications targeting zero defects
•
Addendum-Page 2
PACKAGE MATERIALS INFORMATION
www.ti.com
3-Jul-2021
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
Package Package Pins
Type Drawing
SPQ
Reel
Reel
A0
B0
K0
P1
W
Pin1
Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant
(mm) W1 (mm)
SN74HCS594BQBR
SN74HCS594DR
SN74HCS594DR
SN74HCS594DYYR
WQFN
SOIC
SOIC
BQB
D
16
16
16
16
3000
2500
2500
3000
180.0
330.0
330.0
330.0
12.4
16.4
16.4
12.4
2.8
6.6
6.5
4.8
3.8
9.3
1.2
2.1
2.1
1.6
4.0
8.0
8.0
8.0
12.0
16.0
16.0
12.0
Q1
Q1
Q1
Q3
D
10.3
3.6
SOT-
DYY
23-THN
SN74HCS594PWR
SN74HCS594PWR
TSSOP
TSSOP
PW
PW
16
16
2000
2000
330.0
330.0
12.4
12.4
6.85
6.9
5.45
5.6
1.6
1.6
8.0
8.0
12.0
12.0
Q1
Q1
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
3-Jul-2021
*All dimensions are nominal
Device
Package Type Package Drawing Pins
SPQ
Length (mm) Width (mm) Height (mm)
SN74HCS594BQBR
SN74HCS594DR
SN74HCS594DR
SN74HCS594DYYR
SN74HCS594PWR
SN74HCS594PWR
WQFN
SOIC
BQB
D
16
16
16
16
16
16
3000
2500
2500
3000
2000
2000
210.0
366.0
853.0
336.6
366.0
853.0
185.0
364.0
449.0
336.6
364.0
449.0
35.0
50.0
35.0
31.8
50.0
35.0
SOIC
D
SOT-23-THN
TSSOP
TSSOP
DYY
PW
PW
Pack Materials-Page 2
PACKAGE OUTLINE
PW0016A
TSSOP - 1.2 mm max height
S
C
A
L
E
2
.
5
0
0
SMALL OUTLINE PACKAGE
SEATING
PLANE
C
6.6
6.2
TYP
A
0.1 C
PIN 1 INDEX AREA
14X 0.65
16
1
2X
5.1
4.9
4.55
NOTE 3
8
9
0.30
16X
4.5
4.3
NOTE 4
1.2 MAX
0.19
B
0.1
C A B
(0.15) TYP
SEE DETAIL A
0.25
GAGE PLANE
0.15
0.05
0.75
0.50
A
20
0 -8
DETAIL A
TYPICAL
4220204/A 02/2017
NOTES:
1. All linear dimensions are in millimeters. Any dimensions in parenthesis are for reference only. Dimensioning and tolerancing
per ASME Y14.5M.
2. This drawing is subject to change without notice.
3. This dimension does not include mold flash, protrusions, or gate burrs. Mold flash, protrusions, or gate burrs shall not
exceed 0.15 mm per side.
4. This dimension does not include interlead flash. Interlead flash shall not exceed 0.25 mm per side.
5. Reference JEDEC registration MO-153.
www.ti.com
EXAMPLE BOARD LAYOUT
PW0016A
TSSOP - 1.2 mm max height
SMALL OUTLINE PACKAGE
SYMM
16X (1.5)
(R0.05) TYP
16
1
16X (0.45)
SYMM
14X (0.65)
8
9
(5.8)
LAND PATTERN EXAMPLE
EXPOSED METAL SHOWN
SCALE: 10X
METAL UNDER
SOLDER MASK
SOLDER MASK
OPENING
SOLDER MASK
OPENING
METAL
EXPOSED METAL
EXPOSED METAL
0.05 MAX
ALL AROUND
0.05 MIN
ALL AROUND
NON-SOLDER MASK
DEFINED
SOLDER MASK
DEFINED
15.000
(PREFERRED)
SOLDER MASK DETAILS
4220204/A 02/2017
NOTES: (continued)
6. Publication IPC-7351 may have alternate designs.
7. Solder mask tolerances between and around signal pads can vary based on board fabrication site.
www.ti.com
EXAMPLE STENCIL DESIGN
PW0016A
TSSOP - 1.2 mm max height
SMALL OUTLINE PACKAGE
16X (1.5)
SYMM
(R0.05) TYP
16
1
16X (0.45)
SYMM
14X (0.65)
8
9
(5.8)
SOLDER PASTE EXAMPLE
BASED ON 0.125 mm THICK STENCIL
SCALE: 10X
4220204/A 02/2017
NOTES: (continued)
8. Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release. IPC-7525 may have alternate
design recommendations.
9. Board assembly site may have different recommendations for stencil design.
www.ti.com
PACKAGE OUTLINE
SOT-23-THIN - 1.1 mm max height
PLASTIC SMALL OUTLINE
DYY0016A
C
3.36
3.16
SEATING PLANE
PIN 1 INDEX
AREA
A
0.1 C
14X 0.5
16
1
4.3
4.1
NOTE 3
2X
3.5
8
9
0.31
16X
0.11
0.1
C A
B
1.1 MAX
2.1
1.9
B
0.2
0.08
TYP
SEE DETAIL A
0.25
GAUGE PLANE
0°- 8°
0.1
0.0
0.63
0.33
DETAIL A
TYP
4224642/A 11/2018
NOTES:
1. All linear dimensions are in millimeters. Any dimensions in parenthesis are for reference only. Dimensioning and tolerancing
per ASME Y14.5M.
2. This drawing is subject to change without notice.
3. This dimension does not include mold flash, protrusions, or gate burrs. Mold flash, protrusions, or gate burrs shall not exceed
0.15 per side.
4. This dimension does not include interlead flash. Interlead flash shall not exceed 0.50 per side.
www.ti.com
EXAMPLE BOARD LAYOUT
SOT-23-THIN - 1.1 mm max height
PLASTIC SMALL OUTLINE
DYY0016A
16X (1.05)
SYMM
16
1
16X (0.3)
SYMM
14X (0.5)
9
8
(R0.05) TYP
(3)
LAND PATTERN EXAMPLE
EXPOSED METAL SHOWN
SCALE: 20X
SOLDER MASK
OPENING
METAL UNDER
SOLDER MASK
METAL
SOLDER MASK
OPENING
NON- SOLDER MASK
DEFINED
SOLDER MASK
DEFINED
(PREFERRED)
SOLDER MASK DETAILS
4224642/A 11/2018
NOTES: (continued)
5. Publication IPC-7351 may have alternate designs.
6. Solder mask tolerances between and around signal pads can vary based on board fabrication site.
www.ti.com
EXAMPLE STENCIL DESIGN
SOT-23-THIN - 1.1 mm max height
PLASTIC SMALL OUTLINE
DYY0016A
16X (1.05)
SYMM
16
1
16X (0.3)
SYMM
14X (0.5)
9
8
(R0.05) TYP
(3)
SOLDER PASTE EXAMPLE
BASED ON 0.125 mm THICK STENCIL
SCALE: 20X
4224642/A 11/2018
NOTES: (continued)
7. Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release. IPC-7525 may have alternate
design recommendations.
8. Board assembly site may have different recommendations for stencil design.
www.ti.com
GENERIC PACKAGE VIEW
BQB 16
2.5 x 3.5, 0.5 mm pitch
WQFN - 0.8 mm max height
PLASTIC QUAD FLATPACK - NO LEAD
This image is a representation of the package family, actual package may vary.
Refer to the product data sheet for package details.
4226161/A
www.ti.com
PACKAGE OUTLINE
WQFN - 0.8 mm max height
PLASTIC QUAD FLAT PACK-NO LEAD
BQB0016A
A
2.6
2.4
B
3.6
3.4
PIN 1 INDEX AREA
C
0.8
0.7
SEATING PLANE
0.08 C
1.1
0.9
0.05
0.00
(0.2) TYP
2X 0.5
8
9
10X 0.5
7
10
SYMM
2X
2.5
2.1
1.9
15
2
0.30
0.18
16X
0.5
0.3
16
1
PIN 1 ID
(OPTIONAL)
SYMM
16X
0.1
C A B
0.05
C
4224640/A 11/2018
NOTES:
1. All linear dimensions are in millimeters. Any dimensions in parenthesis are for reference only. Dimensioning and tolerancing
per ASME Y14.5M.
2. This drawing is subject to change without notice.
3. The package thermal pad must be soldered to the printed circuit board for optimal thermal and mechanical performance.
www.ti.com
EXAMPLE BOARD LAYOUT
WQFN - 0.8 mm max height
BQB0016A
PLASTIC QUAD FLAT PACK-NO LEAD
(2.3)
(1)
2X (0.5)
1
16
10X (0.5)
2
15
SYMM
2X
(2.5)
(2)
(3.3)
2X
(0.75)
10
7
16X (0.24)
16X (0.6)
(Ø0.2) VIA
TYP
9
8
SYMM
(R0.05) TYP
LAND PATTERN EXAMPLE
EXPOSED METAL SHOWN
SCALE: 20X
0.07 MAX
ALL AROUND
METAL UNDER
SOLDER MASK
0.07 MIN
ALL AROUND
METAL
EXPOSED METAL
SOLDER MASK
OPENING
SOLDER MASK
OPENING
EXPOSED METAL
NON-SOLDER MASK
SOLDER MASK
DEFINED
DEFINED
(PREFERRED)
4224640/A 11/2018
NOTES: (continued)
4. This package is designed to be soldered to a thermal pad on the board. For more information, see Texas Instruments literature
number SLUA271 (www.ti.com/lit/slua271)
.
5. Vias are optional depending on application, refer to device data sheet. If any vias are implemented, refer to their locations shown
on this view. It is recommended that vias under paste be filled, plugged or tented.
www.ti.com
EXAMPLE STENCIL DESIGN
WQFN - 0.8 mm max height
BQB0016A
PLASTIC QUAD FLAT PACK-NO LEAD
(2.3)
(0.95)
2X (0.5)
1
16
10X (0.5)
2
15
SYMM
2X
(2.5)
(1.79) (3.3)
10
7
16X (0.24)
16X (0.6)
EXPOSED METAL
9
8
SYMM
(R0.05) TYP
SOLDER PASTE EXAMPLE
BASED ON 0.125 mm THICK STENCIL
EXPOSED PAD
85% PRINTED COVERAGE BY AREA
SCALE: 20X
4224640/A 11/2018
NOTES: (continued)
6. Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release. IPC-7525 may have alternate
design recommendations.
www.ti.com
IMPORTANT NOTICE AND DISCLAIMER
TI PROVIDES TECHNICAL AND RELIABILITY DATA (INCLUDING DATASHEETS), DESIGN RESOURCES (INCLUDING REFERENCE
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IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF THIRD
PARTY INTELLECTUAL PROPERTY RIGHTS.
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