SN74LVCH244ADW [TI]
OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS; 八路缓冲器/驱动器，具有三态输出
| 型号： | SN74LVCH244ADW |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS |
| 文件： | 总9页 (文件大小：129K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN54LVCH244A, SN74LVCH244A
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCES009G – JULY 1995 - REVISED JUNE 1998
SN54LVCH244A . . . J OR W PACKAGE
SN74LVCH244A . . . DB, DW, OR PW PACKAGE
(TOP VIEW)
EPIC (Enhanced-Performance Implanted
CMOS) Submicron Process
Typical V
< 0.8 V at V
(Output Ground Bounce)
OLP
= 3.3 V, T = 25°C
CC
A
1OE
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
V
CC
1
2
3
4
5
6
7
8
9
20
19
18
17
16
15
14
Typical V
> 2 V at V
(Output V
Undershoot)
2OE
1Y1
2A4
1Y2
2A3
1Y3
OHV
CC
OH
= 3.3 V, T = 25°C
A
Power Off Disables Outputs, Permitting
Live Insertion
Support Mixed-Mode Signal Operation on
All Ports (5-V Input/Output Voltage With
13 2A2
12 1Y4
11 2A1
3.3-V V
)
CC
ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
GND 10
SN54LVCH244A . . . FK PACKAGE
(TOP VIEW)
Latch-Up Performance Exceeds 250 mA Per
JESD 17
Bus Hold on Data Inputs Eliminates the
Need for External Pullup/Pulldown
Resistors
3
2
1 20 19
18
1Y1
2A4
1Y2
2A3
1Y3
1A2
2Y3
1A3
2Y2
1A4
4
5
6
7
8
Package Options Include Plastic
17
16
15
14
Small-Outline (DW), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages, Ceramic Flat (W) Package,
Ceramic Chip Carriers (FK), and DIPs (J)
9 10 11 12 13
description
The SN54LVCH244A octal buffer/line driver is designed for 2.7-V to 3.6-V V
operation and the
CC
SN74LVCH244A octal buffer/line driver is designed for 1.65-V to 3.6-V V
operation.
CC
These devices are organized as two 4-bit line drivers with separate output-enable (OE) inputs. When OE is low,
these devices pass data from the A inputs to the Y outputs. When OE is high, the outputs are in the
high-impedance state.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of these devices as translators
in a mixed 3.3-V/5-V system environment.
To ensure the high-impedance state during power up or power down, OE should be tied to V through a pullup
CC
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
The SN54LVCH244A is characterized for operation over the full military temperature range of –55°C to 125°C.
The SN74LVCH244A is characterized for operation from –40°C to 85°C.
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.
EPIC is a trademark of Texas Instruments Incorporated.
Copyright 1998, Texas Instruments Incorporated
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
PRODUCTION DATA information is 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
SN54LVCH244A, SN74LVCH244A
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCES009G – JULY 1995 - REVISED JUNE 1998
FUNCTION TABLE
(each buffer)
INPUTS
OUTPUT
Y
OE
A
H
L
L
L
H
L
H
X
Z
†
logic symbol
1
19
1OE
EN
EN
2OE
2
4
6
8
18
11
13
15
17
9
7
5
3
1A1
1A2
1A3
1A4
1Y1
1Y2
1Y3
1Y4
2A1
2A2
2A3
2A4
2Y1
2Y2
2Y3
2Y4
16
14
12
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
logic diagram (positive logic)
1
19
11
1OE
2OE
2A1
2
18
16
14
12
9
7
5
3
1A1
1Y1
1Y2
1Y3
1Y4
2Y1
2Y2
2Y3
2Y4
4
13
15
17
1A2
2A2
2A3
2A4
6
1A3
8
1A4
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54LVCH244A, SN74LVCH244A
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCES009G – JULY 1995 - REVISED JUNE 1998
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 6.5 V
CC
Input voltage range, V (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 6.5 V
I
Voltage range applied to any output in the high-impedance or power-off state, V
O
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 6.5 V
Voltage range applied to any output in the high or low state, V
O
(see Notes 1 and 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to V
+ 0.5 V
CC
Input clamp current, I (V < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –50 mA
(V < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –50 mA
Continuous output current, I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA
or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±100 mA
Package thermal impedance, θ (see Note 3): DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115°C/W
IK
I
Output clamp current, I
OK
O
O
Continuous current through V
CC
JA
DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97°C/W
PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128°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 negative-voltage and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The value of V is provided in the recommended operating conditions table.
CC
3. The package thermal impedance is calculated in accordance with JESD 51.
recommended operating conditions (see Note 4)
SN54LVCH244A
SN74LVCH244A
UNIT
MIN
2
MAX
MIN
1.65
1.5
MAX
Operating
3.6
3.6
V
V
Supply voltage
V
CC
Data retention only
1.5
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
= 1.65 V to 1.95 V
= 2.3 V to 2.7 V
= 2.7 V to 3.6 V
= 1.65 V to 1.95 V
= 2.3 V to 2.7 V
= 2.7 V to 3.6 V
0.65 × V
1.7
CC
High-level input voltage
V
V
IH
2
2
0.35 × V
0.7
CC
V
IL
Low-level input voltage
0.8
5.5
0.8
V
V
Input voltage
0
0
0
0
0
0
5.5
V
V
I
High or low state
3 state
V
V
CC
5.5
CC
5.5
Output voltage
O
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
= 1.65 V
= 2.3 V
= 2.7 V
= 3 V
–4
–8
I
High-level output current
Low-level output current
mA
mA
OH
OL
–12
–24
–12
–24
4
= 1.65 V
= 2.3 V
= 2.7 V
= 3 V
8
I
12
24
12
24
10
85
∆t/∆v
Input transition rise or fall rate
Operating free-air temperature
0
10
0
ns/V
T
–55
125
–40
°C
A
NOTE 4: All unused control inputs of the device must be held at V
or GND to ensure proper device operation. Refer to the TI application report,
CC
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54LVCH244A, SN74LVCH244A
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCES009G – JULY 1995 - REVISED JUNE 1998
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN54LVCH244A
SN74LVCH244A
PARAMETER
TEST CONDITIONS
UNIT
V
CC
†
TYP
†
TYP
MIN
MAX
MIN
V –0.2
CC
MAX
1.65 V to 3.6 V
2.7 V to 3.6 V
1.65 V
I
= –100 µA
OH
V
–0.2
CC
I
I
= –4 mA
= –8 mA
1.2
1.7
2.2
2.4
2.2
OH
V
OH
2.3 V
V
OH
2.7 V
2.2
2.4
2.2
I
I
I
= –12 mA
= –24 mA
= 100 µA
OH
OH
OL
3 V
3 V
1.65 V to 3.6 V
2.7 V to 3.6 V
1.65 V
0.2
0.2
I
I
I
I
= 4 mA
= 8 mA
= 12 mA
= 24 mA
0.45
0.7
OL
OL
OL
OL
V
OL
V
2.3 V
2.7 V
0.4
0.55
±5
0.4
3 V
0.55
±5
I
I
V = 0 to 5.5 V
I
3.6 V
µA
µA
I
V or V = 5.5 V
0
±10
I
O
off
V = 0.58 V
‡
‡
I
1.65 V
2.3 V
3 V
V = 1.07 V
I
I
µA
I(hold)
V = 0.7 V
I
45
–45
75
–75
V = 1.7 V
I
V = 0.8 V
I
75
I
V = 2 V
I
–75
µA
I(hold)
§
V = 0 to 3.6 V
3..6 V
3.6 V
±500
±15
10
±500
±10
10
I
V
O
= 0 to 5.5 V
µA
µA
I
I
OZ
V = V
I
or GND
CC
I
O
= 0
3.6 V
CC
¶
3.6 V ≤ V ≤ 5.5 V
10
10
I
One input at V
– 0.6 V,
or GND
CC
Other inputs at V
∆I
CC
2.7 V to 3.6 V
500
500
µA
CC
V = V or GND
CC
C
C
3.3 V
3.3 V
4
12
12
4
pF
pF
i
I
V
O
= V
or GND
5.5
5.5
o
CC
†
‡
§
¶
All typical values are at V
This information was not available at the time of publication.
This is the bus-hold maximum dynamic current required to switch the input from one state to another.
This applies in the disabled state only.
= 3.3 V, T = 25°C.
A
CC
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54LVCH244A, SN74LVCH244A
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCES009G – JULY 1995 - REVISED JUNE 1998
switching characteristics over recommended operating free-air temperature range (unless
otherwise noted) (see Figure 3)
SN54LVCH244A
FROM
(INPUT)
TO
(OUTPUT)
V = 3.3 V
CC
± 0.3 V
V
CC
= 2.7 V
PARAMETER
UNIT
MIN
MAX
7.5
9
MIN
1
MAX
6.5
8
t
t
t
A
Y
Y
Y
ns
ns
ns
pd
en
dis
1
OE
OE
8
1
7
switching characteristics over recommended operating free-air temperature range (unless
otherwise noted) (see Figures 1 through 3)
SN74LVCH244A
FROM
(INPUT)
TO
(OUTPUT)
V = 1.8 V
CC
± 0.15 V
V = 2.5 V
CC
± 0.2 V
V = 3.3 V
CC
± 0.3 V
V
CC
= 2.7 V
PARAMETER
UNIT
MIN
MAX
MIN
MAX
MIN
MAX
6.9
MIN
1.5
1
MAX
5.9
†
†
†
†
t
t
t
A
Y
Y
Y
ns
ns
ns
pd
en
dis
†
†
†
†
†
†
†
†
8.6
7.6
OE
OE
6.8
1.5
5.8
†
This information was not available at the time of publication.
operating characteristics, T = 25°C
A
V
= 1.8 V
± 0.15 V
V
= 2.5 V
± 0.2 V
V = 3.3 V
CC
CC
CC
TEST
CONDITIONS
± 0.3 V
PARAMETER
UNIT
TYP
TYP
TYP
†
†
Outputs enabled
Outputs disabled
47
Power dissipation capacitance
per buffer/driver
C
f = 10 MHz
pF
pd
†
†
2
†
This information was not available at the time of publication.
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54LVCH244A, SN74LVCH244A
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCES009G – JULY 1995 - REVISED JUNE 1998
PARAMETER MEASUREMENT INFORMATION
= 1.8 V ± 0.15 V
V
CC
2 × V
CC
Open
S1
1k Ω
From Output
Under Test
TEST
S1
GND
t
Open
pd
/t
C
= 30 pF
t
2 × V
CC
Open
L
PLZ PZL
1k Ω
(see Note A)
t
/t
PHZ PZH
LOAD CIRCUIT
t
w
V
CC
V
CC
V
CC
/2
V
CC
/2
Input
Timing
Input
V
/2
CC
0 V
0 V
VOLTAGE WAVEFORMS
PULSE DURATION
t
su
t
h
V
CC
Output
Control
(low-level
enabling)
Data
Input
V
CC
V
/2
V
CC
/2
CC
V
CC
/2
V
CC
/2
0 V
0 V
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
t
t
PZL
PLZ
Output
Waveform 1
V
CC
V
CC
V
/2
CC
Input
V
CC
/2
V
CC
/2
S1 at 2 × V
(see Note B)
V
V
+ 0.15 V
V
CC
OL
0 V
OL
t
t
PZH
PHZ
t
t
PLH
PHL
Output
Waveform 2
S1 at Open
(see Note B)
V
OH
V
V
OH
– 0.15 V
OH
V
/2
CC
Output
V
CC
/2
V
CC
/2
0 V
OL
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
NOTES: A.
C
L
includes probe and jig capacitance.
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 ns, t ≤2 ns.
O
r
f
D. The outputs are measured one at a time with one transition per measurement.
E.
F.
G.
t
t
t
and t
and t
and t
PHL
are the same as t
.
dis
PLZ
PZL
PLH
PHZ
PZH
are the same as t
.
en
are the same as t .
pd
Figure 1. Load Circuit and Voltage Waveforms
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54LVCH244A, SN74LVCH244A
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCES009G – JULY 1995 - REVISED JUNE 1998
PARAMETER MEASUREMENT INFORMATION
= 2.5 V ± 0.2 V
V
CC
2 × V
CC
Open
S1
500 Ω
From Output
Under Test
TEST
S1
GND
t
Open
pd
/t
C
= 30 pF
t
2 × V
CC
GND
L
PLZ PZL
500 Ω
(see Note A)
t
/t
PHZ PZH
LOAD CIRCUIT
t
w
V
CC
V
CC
V
CC
/2
V
CC
/2
Input
Timing
Input
V
/2
CC
0 V
0 V
VOLTAGE WAVEFORMS
PULSE DURATION
t
su
t
h
V
CC
Output
Control
(low-level
enabling)
Data
Input
V
CC
V
/2
V
CC
/2
CC
V
CC
/2
V
CC
/2
0 V
0 V
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
t
t
PZL
PLZ
Output
Waveform 1
V
CC
V
CC
V
/2
CC
Input
V
CC
/2
V
CC
/2
S1 at 2 × V
(see Note B)
V
V
+ 0.15 V
V
CC
OL
0 V
OL
t
t
PZH
PHZ
t
t
PLH
PHL
Output
Waveform 2
S1 at GND
V
OH
V
V
OH
– 0.15 V
OH
V
/2
CC
Output
V
CC
/2
V
CC
/2
0 V
OL
(see Note B)
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
NOTES: A.
C
L
includes probe and jig capacitance.
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 ns, t ≤2 ns.
O
r
f
D. The outputs are measured one at a time with one transition per measurement.
E.
F.
G.
t
t
t
and t
and t
and t
PHL
are the same as t
.
dis
PLZ
PZL
PLH
PHZ
PZH
are the same as t
.
en
are the same as t .
pd
Figure 2. Load Circuit and Voltage Waveforms
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54LVCH244A, SN74LVCH244A
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCES009G – JULY 1995 - REVISED JUNE 1998
PARAMETER MEASUREMENT INFORMATION
V
= 2.7 V AND 3.3 V ± 0.3 V
CC
6 V
TEST
S1
S1
500 Ω
Open
GND
t
Open
6 V
pd
/t
From Output
Under Test
t
PLZ PZL
/t
t
GND
PHZ PZH
C
= 50 pF
L
500 Ω
(see Note A)
t
w
LOAD CIRCUIT
2.7 V
0 V
1.5 V
1.5 V
Input
2.7 V
0 V
Timing
Input
1.5 V
VOLTAGE WAVEFORMS
PULSE DURATION
t
su
t
h
2.7 V
0 V
Data
Input
2.7 V
0 V
1.5 V
1.5 V
Output
Control
(low-level
enabling)
1.5 V
1.5 V
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
t
t
PZL
t
PLZ
3 V
Output
Waveform 1
S1 at 6 V
2.7 V
0 V
1.5 V
Input
1.5 V
1.5 V
V
V
+ 0.3 V
– 0.3 V
OL
V
OL
OH
(see Note B)
t
PHZ
t
PLH
t
PHL
PZH
Output
Waveform 2
S1 at GND
V
V
OH
OH
1.5 V
Output
1.5 V
1.5 V
(see Note B)
0 V
V
OL
VOLTAGE WAVEFORMS
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
ENABLE AND DISABLE TIMES
NOTES: A.
C
L
includes probe and jig capacitance.
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.
E.
F.
G.
t
t
t
and t
and t
and t
PHL
are the same as t
.
dis
PLZ
PZL
PLH
PHZ
PZH
are the same as t
.
en
are the same as t .
pd
Figure 3. Load Circuit and Voltage Waveforms
8
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
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Copyright 1998, Texas Instruments Incorporated
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