POSITIVE-NAND BUFFERS. SN54ALS38B Datasheet

SN54ALS38B BUFFERS. Datasheet pdf. Equivalent

SN54ALS38B Datasheet
Recommendation SN54ALS38B Datasheet
Part SN54ALS38B
Description QUADRUPLE 2-INPUT POSITIVE-NAND BUFFERS
Feature SN54ALS38B; SN54ALS38B, SN74ALS38B QUADRUPLE 2-INPUT POSITIVE-NAND BUFFERS WITH OPEN-COLLECTOR OUTPUTS SDAS196B .
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Texas Instruments SN54ALS38B
SN54ALS38B, SN74ALS38B
QUADRUPLE 2-INPUT POSITIVE-NAND BUFFERS
WITH OPEN-COLLECTOR OUTPUTS
SDAS196B – APRIL 1982 – REVISED DECEMBER 1994
Package Options Include Plastic
Small-Outline (D) Packages, Ceramic Chip
Carriers (FK), and Standard Plastic (N) and
Ceramic (J) 300-mil DIPs
description
These devices contain four independent 2-input
positive-NAND buffers with open-collector
outputs. They perform the Boolean functions
Y = A B or Y = A + B in positive logic. The
open-collector outputs require pullup resistors to
perform correctly. These outputs may be
connected to other open-collector outputs to
implement active-low wired-OR or active-high
wired-AND functions. Open-collector devices
often are used to generate higher VOH levels.
The SN54ALS38B is characterized for operation
over the full military temperature range of – 55°C
to 125°C. The SN74ALS38B is characterized for
operation from 0°C to 70°C.
FUNCTION TABLE
(each gate)
SN54ALS38B . . . J PACKAGE
SN74ALS38B . . . D OR N PACKAGE
(TOP VIEW)
1A
1B
1Y
2A
2B
2Y
GND
1
2
3
4
5
6
7
14 VCC
13 4B
12 4A
11 4Y
10 3B
9 3A
8 3Y
SN54ALS38B . . . FK PACKAGE
(TOP VIEW)
3 2 1 20 19
1Y 4
18 4A
NC 5
17 NC
2A 6
16 4Y
NC 7
15 NC
2B 8
14 3B
9 10 11 12 13
INPUTS
AB
HH
OUTPUT
Y
L
NC – No internal connection
LX
H
XL
H
logic symbol
1
1A
2
1B
4
2A
5
2B
9
3A
10
3B
12
4A
13
4B
&
3
1Y
6
2Y
8
3Y
11
4Y
This symbol is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
Pin numbers shown are for the D, J, and N packages.
logic diagram (positive logic)
1
1A
2
1B
4
2A
5
2B
9
3A
10
3B
12
4A
13
4B
3
1Y
6
2Y
8
3Y
11
4Y
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.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1994, Texas Instruments Incorporated
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Texas Instruments SN54ALS38B
SN54ALS38B, SN74ALS38B
QUADRUPLE 2-INPUT POSITIVE-NAND BUFFERS
WITH OPEN-COLLECTOR OUTPUTS
SDAS196B – APRIL 1982 – REVISED DECEMBER 1994
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Operating free-air temperature range, TA: SN54ALS38B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 125°C
SN74ALS38B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C
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.
recommended operating conditions
VCC
VIH
VIL
VOH
IOL
TA
Supply voltage
High-level input voltage
Low-level input voltage
High-level output voltage
Low-level output current
Operating free-air temperature
SN54ALS38B
MIN NOM MAX
4.5 5 5.5
2
0.7
5.5
12
– 55 125
SN74ALS38B
MIN NOM MAX
4.5 5 5.5
2
0.8
5.5
24
0 70
UNIT
V
V
V
V
mA
°C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VIK VCC = 4.5 V,
VOL
VCC = 4.5 V
II VCC = 5.5 V,
IIH VCC = 5.5 V,
IIL VCC = 5.5 V,
IOH VCC = 4.5 V,
ICCH
VCC = 5.5 V,
ICCL
VCC = 5.5 V,
‡ All typical values are at VCC = 5 V, TA = 25°C.
II = –18 mA
IOL = 12 mA
IOL = 24 mA
VI = 7 V
VI = 2.7 V
VI = 0.4 V
VOH = 5.5 V
VI = 0
VI = 4.5 V
SN54ALS38B
MIN TYP‡ MAX
–1.5
0.25 0.4
0.1
20
– 0.1
0.1
0.86 1.6
4.8 7.8
SN74ALS38B
MIN TYP‡ MAX
–1.5
0.25 0.4
0.35 0.5
0.1
20
– 0.1
0.1
0.86 1.6
4.8 7.8
UNIT
V
V
mA
µA
mA
mA
mA
mA
switching characteristics (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
RL = 500 ,
TA = MIN to MAX§
SN54ALS38B SN74ALS38B
MIN MAX MIN MAX
tPLH
tPHL
A or B
7 59 10
Y
2 20
1
§ For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
33
12
UNIT
ns
2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265



Texas Instruments SN54ALS38B
From Output
Under Test
CL
(see Note A)
SN54ALS38B, SN74ALS38B
QUADRUPLE 2-INPUT POSITIVE-NAND BUFFERS
WITH OPEN-COLLECTOR OUTPUTS
SDAS196B – APRIL 1982 – REVISED DECEMBER 1994
PARAMETER MEASUREMENT INFORMATION
SERIES 54ALS/74ALS AND 54AS/74AS DEVICES
VCC
Test
Point
RL
From Output
Under Test
CL
(see Note A)
RL
Test
Point
7V
RL = R1 = R2
S1
From Output
Under Test
CL
(see Note A)
R1
Test
Point
R2
LOAD CIRCUIT FOR
BI-STATE
TOTEM-POLE OUTPUTS
LOAD CIRCUIT
FOR OPEN-COLLECTOR OUTPUTS
LOAD CIRCUIT
FOR 3-STATE OUTPUTS
Timing
Input
Data
Input
tsu
1.3 V
th
1.3 V
1.3 V
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
3.5 V
0.3 V
3.5 V
0.3 V
High-Level
Pulse
Low-Level
Pulse
1.3 V
tw
1.3 V
1.3 V
1.3 V
VOLTAGE WAVEFORMS
PULSE DURATIONS
3.5 V
0.3 V
3.5 V
0.3 V
Output
Control
(low-level
enabling)
tPZL
Waveform 1
S1 Closed
(see Note B)
tPZH
Waveform 2
S1 Open
(see Note B)
1.3 V
1.3 V
tPHZ
1.3 V
1.3 V
tPLZ
3.5 V
0.3 V
[3.5 V
VOL
0.3 V
VOH
0.3 V
[0 V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS
Input
tPLH
In-Phase
Output
tPHL
Out-of-Phase
Output
(see Note C)
1.3 V
1.3 V
1.3 V
1.3 V
3.5 V
0.3 V
tPHL
VOH
1.3 V
VOL
tPLH
VOH
1.3 V
VOL
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
NOTES: A. CL 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. When measuring propagation delay items of 3-state outputs, switch S1 is open.
D. All input pulses have the following characteristics: PRR 1 MHz, tr = tf = 2 ns, duty cycle = 50%.
E. The outputs are measured one at a time with one transition per measurement.
Figure 1. Load Circuits and Voltage Waveforms
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
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