SN54ABT16843 [TI]
18-BIT BUS-INTERFACE D-TYPE LATCHES WITH 3-STATE OUTPUTS; 18位总线接口D类锁存器具有三态输出
| 型号： | SN54ABT16843 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 18-BIT BUS-INTERFACE D-TYPE LATCHES WITH 3-STATE OUTPUTS |
| 文件： | 总8页 (文件大小：135K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN54ABT16843, SN74ABT16843
18-BIT BUS-INTERFACE D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCBS223E – OCTOBER 1992 – REVISED MAY 1997
SN54ABT16843 . . . WD PACKAGE
SN74ABT16843 . . . DGG OR DL PACKAGE
(TOP VIEW)
Members of the Texas Instruments
Widebus Family
State-of-the-Art EPIC-ΙΙB BiCMOS Design
Significantly Reduces Power Dissipation
1
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
1CLR
1OE
1Q1
GND
1Q2
1Q3
1LE
1PRE
1D1
GND
1D2
1D3
Distributed V
Minimizes High-Speed Switching Noise
and GND Pin Configuration
2
CC
3
4
Flow-Through Architecture Optimizes PCB
Layout
5
6
High-Impedance State During Power Up
and Power Down
7
V
V
CC
CC
8
1Q4
1Q5
1Q6
GND
1Q7
1Q8
1Q9
2Q1
2Q2
2Q3
GND
2Q4
2Q5
2Q6
1D4
1D5
1D6
GND
1D7
1D8
1D9
2D1
2D2
2D3
GND
2D4
2D5
2D6
High-Drive Outputs (–32-mA I , 64-mA I
OH
)
OL
9
Package Options Include Plastic Thin
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Shrink Small-Outline (DGG), 300-mil Shrink
Small-Outline (DL) Packages and 380-mil
Fine-Pitch Ceramic Flat (WD) Package
Using 25-mil Center-to-Center Spacings
description
The ’ABT16843 18-bit bus-interface D-type
latches are designed specifically for driving highly
capacitive or relatively low-impedance loads.
They are particularly suitable for implementing
buffer registers, I/O ports, bidirectional bus
drivers, and working registers.
V
V
CC
CC
2Q7
2Q8
GND
2Q9
2OE
2CLR
2D7
2D8
GND
2D9
2PRE
2LE
The ’ABT16843 can be used as two 9-bit latches
or one 18-bit latch. The 18 latches are transparent
D-type latches. The device provides true data at
its outputs.
A buffered output-enable (OE) input can be used
to place the nine outputs in either a normal logic
state (high or low logic levels) or
a
high-impedance state. The outputs are in the
high-impedance state during power up and power
down. The outputs remain in the high-impedance
state while the device is powered down. In the
high-impedance state, the outputs neither load
nor drive the bus lines significantly. The
high-impedance state and increased drive
provide the capability to drive bus lines without
need for interface or pullup components.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Widebus and EPIC-ΙΙB are trademarks of Texas Instruments Incorporated.
Copyright 1997, Texas Instruments Incorporated
UNLESS OTHERWISE NOTED this document contains PRODUCTION
DATA information current as of publication date. Products conform to
specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all
parameters.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54ABT16843, SN74ABT16843
18-BIT BUS-INTERFACE D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCBS223E – OCTOBER 1992 – REVISED MAY 1997
description (continued)
OE does not affect the internal operations of the latch. Previously stored data can be retained or new data can
be entered while the outputs are in the high-impedance state.
When V
is between 0 and 2.1 V, the device is in the high-impedance state during power up or power down.
CC
However, to ensure the high-impedance state above 2.1 V, OE should be tied to V
the minimum value of the resistor is determined by the current-sinking capability of the driver.
through a pullup resistor;
CC
The SN54ABT16843 is characterized for operation over the full military temperature range of –55°C to 125°C.
The SN74ABT16843 is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
(each 9-bit latch)
INPUTS
OUTPUT
Q
LE
X
D
X
X
L
PRE
L
CLR
X
OE
L
H
L
H
L
L
X
H
H
L
H
H
L
L
H
H
L
H
X
X
H
H
H
L
Q
0
X
X
H
X
Z
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54ABT16843, SN74ABT16843
18-BIT BUS-INTERFACE D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCBS223E – OCTOBER 1992 – REVISED MAY 1997
logic diagram (positive logic)
2
1OE
55
1PRE
1
1CLR
56
1LE
S2
C1
1D
3
54
1Q1
1D1
R
To Eight Other Channels
27
2OE
30
2PRE
28
2CLR
29
2LE
S2
C1
1D
15
42
2Q1
2D1
R
To Eight Other Channels
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54ABT16843, SN74ABT16843
18-BIT BUS-INTERFACE D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCBS223E – OCTOBER 1992 – REVISED MAY 1997
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V
CC
Input voltage range, V (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V
I
Voltage range applied to any output in the high or power-off state, V
. . . . . . . . . . . . . . . . . . . –0.5 V to 5.5 V
O
Current into any output in the low state, I : SN54ABT16843 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 mA
O
SN74ABT16843 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA
Input clamp current, I (V < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –18 mA
IK
OK
I
Output clamp current, I
(V < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –50 mA
O
Package thermal impedance, θ (see Note 2): DGG package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81°C/W
JA
DL package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74°C/W
Storage temperature range, T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
stg
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
2. The package thermal impedance is calculated in accordance with EIA/JEDEC Std JESD51.
recommended operating conditions (see Note 3)
SN54ABT16843 SN74ABT16843
UNIT
MIN
4.5
2
MAX
MIN
4.5
2
MAX
V
V
V
V
Supply voltage
5.5
5.5
V
V
CC
High-level input voltage
Low-level input voltage
Input voltage
IH
0.8
0.8
V
IL
0
V
0
V
CC
V
I
CC
I
I
High-level output current
Low-level output current
Input transition rise or fall rate
Power-up ramp rate
–24
48
–32
64
mA
mA
ns/V
µs/V
°C
OH
OL
∆t/∆v
∆t/∆V
Outputs enabled
10
10
200
–55
200
–40
CC
T
Operating free-air temperature
125
85
A
NOTE 3: Unused inputs must be held high or low to prevent them from floating.
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54ABT16843, SN74ABT16843
18-BIT BUS-INTERFACE D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCBS223E – OCTOBER 1992 – REVISED MAY 1997
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
T
= 25°C
SN54ABT16843 SN74ABT16843
A
PARAMETER
TEST CONDITIONS
UNIT
†
MIN TYP
MAX
MIN
MAX
MIN
MAX
V
V
V
V
V
= 4.5 V,
= 4.5 V,
= 5 V,
I = –18 mA
–1.2
–1.2
–1.2
V
IK
CC
CC
CC
I
I
I
I
I
I
I
= –3 mA
= –3 mA
= –24 mA
= –32 mA
= 48 mA
= 64 mA
2.5
3
2.5
3
2.5
3
OH
OH
OH
OH
OL
OL
V
V
OH
2
2
V
= 4.5 V
= 4.5 V
CC
CC
2*
2
0.55
0.55
V
V
V
OL
0.55*
0.55
100
mV
hys
V
= 0 to 5.5 V,
CC
I
±1
±50
±50
10
±1
±50
±50
10
±1
±50
±50
10
µA
I
V = V
I
or GND
CC
V
V
= 0 to 2.1 V,
= 0.5 V to 2.7 V, OE = X
CC
O
‡
µA
µA
µA
µA
I
I
I
I
OZPU
OZPD
OZH
V
V
= 2.1 V to 0,
= 0.5 V to 2.7 V, OE = X
CC
O
‡
V
V
= 2.1 V to 5.5 V,
= 2.7 V, OE ≥ 2 V
CC
O
V
V
= 2.1 V to 5.5 V,
= 0.5 V, OE ≥ 2 V
CC
O
–10
–10
–10
OZL
I
I
I
V
V
V
= 0,
V or V ≤ 4.5 V
±100
50
±100
50
µA
µA
off
CC
CC
CC
I
O
Outputs high
= 5.5 V,
= 5.5 V,
V
= 5.5 V
50
–180
0.5
CEX
O
O
§
V
= 2.5 V
–50
–100
–180
0.5
–50
–50
–180
0.5
mA
O
Outputs high
Outputs low
V
= 5.5 V, I = 0,
O
or GND
CC
CC
I
85
85
85
mA
CC
V = V
I
Outputs disabled
0.5
0.5
0.5
V
= 5.5 V, One input at 3.4 V,
CC
Other inputs at V
¶
1.5
1.5
1.5
mA
∆I
CC
or GND
CC
V = 2.5 V or 0.5 V
C
C
3.5
8
pF
pF
i
I
V
O
= 2.5 V or 0.5 V
o
* On products compliant to MIL-PRF-38535, this parameter does not apply.
†
‡
§
¶
All typical values are at V
= 5 V.
CC
This parameter is characterized, but not production tested.
Not more than one output should be tested at a time, and the duration of the test should not exceed one second.
This is the increase in supply current for each input that is at the specified TTL voltage level rather than V or GND.
CC
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54ABT16843, SN74ABT16843
18-BIT BUS-INTERFACE D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCBS223E – OCTOBER 1992 – REVISED MAY 1997
timing requirements over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Figure 1)
V
T
= 5 V,
= 25°C
CC
A
SN54ABT16843 SN74ABT16843
UNIT
MIN
3.3
3.3
3.3
0.9
0.6
1.7
1.8
MAX
MIN
3.3
3.3
3.3
0.9
0.6
1.7
1.8
MAX
MIN
3.3
3.3
3.3
0.9
0.6
1.7
1.8
MAX
CLR low
PRE low
LE high
High
t
Pulse duration
ns
w
t
t
Setup time, data before LE↓
Hold time, data after LE↓
ns
ns
su
Low
High
h
Low
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature, C = 50 pF (unless otherwise noted) (see Figure 1)
L
V
T
= 5 V,
= 25°C
CC
A
SN54ABT16843 SN74ABT16843
FROM
(INPUT)
TO
(OUTPUT)
PARAMETER
UNIT
MIN
1.6
1.6
2.3
2.5
2.1
2.2
1.9
2.2
1.6
2
TYP
3.1
3.2
4
MAX
4.2
4.2
5
MIN
1.6
1.6
2.3
2.5
2.1
2.2
1.9
2.2
1.6
2
MAX
5.1
5
MIN
1.6
1.6
2.3
2.5
2.1
2.2
1.9
2.2
1.6
2
MAX
4.8
4.8
5.9
5.3
6.1
5
t
t
t
t
t
t
t
t
t
t
t
t
PLH
PHL
PLH
PHL
PLH
PHL
PLH
PHL
PZH
PZL
PHZ
PLZ
D
Q
Q
Q
Q
Q
Q
ns
ns
ns
ns
ns
ns
6.3
5.6
6.3
5.3
5.7
6.1
5.5
5.9
6.4
5.3
LE
3.9
4
4.8
5.1
4.6
4.8
5.3
4.3
4.6
5.5
4.4
PRE
CLR
OE
3.7
3.7
4.2
3.3
3.2
4
5.4
6
5.4
5.8
6.3
5.2
1.7
1.7
1.7
1.7
1.7
1.7
OE
3.7
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54ABT16843, SN74ABT16843
18-BIT BUS-INTERFACE D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCBS223E – OCTOBER 1992 – REVISED MAY 1997
PARAMETER MEASUREMENT INFORMATION
7 V
Open
S1
500 Ω
From Output
Under Test
TEST
S1
GND
t
t
/t
Open
7 V
PLH PHL
/t
C
= 50 pF
L
t
500 Ω
PLZ PZL
/t
(see Note A)
Open
PHZ PZH
LOAD CIRCUIT
3 V
0 V
Timing Input
Data Input
1.5 V
t
w
t
t
h
su
3 V
0 V
3 V
0 V
Input
1.5 V
1.5 V
1.5 V
1.5 V
VOLTAGE WAVEFORMS
PULSE DURATION
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
3 V
0 V
3 V
0 V
Output
Control
1.5 V
1.5 V
1.5 V
1.5 V
Input
t
PZL
t
t
PHL
PLH
t
PLZ
Output
Waveform 1
S1 at 7 V
V
V
3.5 V
OH
1.5 V
1.5 V
1.5 V
1.5 V
Output
V
V
+ 0.3 V
– 0.3 V
OL
V
OL
OL
(see Note B)
t
PHZ
t
PLH
t
t
PZH
PHL
Output
Waveform 2
S1 at Open
(see Note B)
V
OH
V
V
OH
OH
1.5 V
1.5 V
Output
≈ 0 V
OL
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
INVERTING AND NONINVERTING OUTPUTS
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
LOW- AND HIGH-LEVEL ENABLING
NOTES: A.
C includes probe and jig capacitance.
L
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, Z = 50 Ω, t ≤ 2.5 ns, t ≤ 2.5 ns.
O
r
f
D. The outputs are measured one at a time with one transition per measurement.
Figure 1. Load Circuit and Voltage Waveforms
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
IMPORTANT NOTICE
Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue
any product or service without notice, and advise customers to obtain the latest version of relevant information
to verify, before placing orders, that information being relied on is current and complete. All products are sold
subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those
pertaining to warranty, patent infringement, and limitation of liability.
TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF
DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL
APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR
WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER
CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO
BE FULLY AT THE CUSTOMER’S RISK.
In order to minimize risks associated with the customer’s applications, adequate design and operating
safeguards must be provided by the customer to minimize inherent or procedural hazards.
TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent
that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other
intellectual property right of TI covering or relating to any combination, machine, or process in which such
semiconductor products or services might be or are used. TI’s publication of information regarding any third
party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.
Copyright 1998, Texas Instruments Incorporated
相关型号：
©2020 ICPDF网 联系我们和版权申明