Datasheet SN74ALS857DWR, SN74ALS857NT, SNJ54ALS857FK, SNJ54ALS857JT Datasheet (Texas Instruments)
SN54ALS857 . . . JT PACKAGE
SN74ALS857 . . . DW OR NT PACKAGE
(TOP VIEW)
SN54ALS857 . . . FK PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
S0
1A
1B
1Y
2A
2B
2Y
3A
3B
3Y
OPER = 0
GND
V
CC
S1
6A
6B
6Y
5A
5B
5Y
4A
4B
4Y
COMP
NC – No internal connection
3212827
12 13
5
6
7
8
9
10
11
25
24
23
22
21
20
19
6B
6Y
5A
NC
5B
5Y
4A
1Y
2A
2B
NC
2Y
3A
3B
426
14 15 16 17 18
3Y
OPER = 0
GND
NC
COMP
4Y
4B
1B1AS0
NC
S1
6A
V
CC
SN54ALS857, SN74ALS857
HEX 2-TO-1 UNIVERSAL MULTIPLEXERS
WITH 3-STATE OUTPUTS
SDAS170A – DECEMBER 1982 – REVISED JANUARY 1995
Copyright 1995, Texas Instruments Incorporated
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
• Select True or Complementary Data
• Perform AND/NAND (Masking) of
A or B Operand
• Cascadable to Expand Number of
Operands
• Detect Zeros on A or B Operands
• 3-State Outputs Interface Directly With
System Bus
• Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK), and Standard Plastic
(NT) and Ceramic (JT) 300-mil DIPs
description
The ′ALS857 are hextuple 2-line to 1-line
multiplexers with 3-state outputs. The devices can
provide either true (COMP low) or inverted
(COMP high) data at the Y outputs. In addition, the
′ALS857 perform the logical AND function (A • B)
and the clear function as well. The four modes of
operation are:
• Select A-data inputs
• Select B-data inputs
• AND A inputs with B inputs
• Clear
In either of the first two modes, OPER = 0 is high
if all the selected A or B inputs are low. The six Y
outputs and the OPER = 0 output are all 3-state
and rated at 12-mA and 24-mA I
OL
for the
SN54ALS857 and SN74ALS857, respectively . All
outputs can be placed in the high-impedance state
by applying a high level to the COMP, S0, and S1
inputs simultaneously .
The SN54ALS857 is characterized for operation over the full military temperature range of –55°C to 125°C. The
SN74ALS857 is characterized for operation from 0°C to 70°C.
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.
SN54ALS857, SN74ALS857
HEX 2-TO-1 UNIVERSAL MULTIPLEXERS
WITH 3-STATE OUTPUTS
SDAS170A – DECEMBER 1982 – REVISED JANUAR Y 1995
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
FUNCTION TABLE
INPUTS
OUTPUTS
COMP S1 S0 Y OPER = 0
L L L A H = all A inputs L
L L HBH = all B inputs L
L H LA • B Z
L H HL L
H LLAH = all A inputs L
H L HBH = all B inputs L
H H LA • B Z
H H H Z Z
logic symbol
†
0
1
S0
5
2A
6
2B
8
3A
9
3B
16
4A
15
4B
19
5A
18
5B
22
6A
21
6B
1Y
4
G
0
3
1
23
S1
N4
13
COMP
3
3
2
0
2
1A
1
3
1B
2Y
7
3Y
10
4Y
14
5Y
17
6Y
20
OPER = 0
11
EN5
EN6
2
&
MUX
1
≥1
≥1
3
4,5
6
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
Pin numbers shown are for the DW, JT, and NT packages.
SN54ALS857, SN74ALS857
HEX 2-TO-1 UNIVERSAL MULTIPLEXERS
WITH 3-STATE OUTPUTS
SDAS170A – DECEMBER 1982 – REVISED JANUARY 1995
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
logic diagram (positive logic)
Details of
Four Identical Channels
Not Shown
1
23
13
2
3
5
6
8
9
16
15
19
18
22
21
4
7
20
10
17
14
11
S0
S1
COMP
1A
1B
2A
2B
3A
3B
4A
4B
5A
5B
6A
6B
1Y
2Y
3Y
4Y
5Y
6Y
OPER = 0
Pin numbers shown are for the DW, JT, and NT packages.
SN54ALS857, SN74ALS857
HEX 2-TO-1 UNIVERSAL MULTIPLEXERS
WITH 3-STATE OUTPUTS
SDAS170A – DECEMBER 1982 – REVISED JANUAR Y 1995
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Supply voltage, V
CC
7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, V
I
7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage applied to a disabled 3-state output 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, T
A
: SN54ALS857 –55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74ALS857 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
SN54ALS857 SN74ALS857
MIN NOM MAX MIN NOM MAX
UNIT
V
CC
Supply voltage 4.5 5 5.5 4.5 5 5.5 V
V
IH
High-level input voltage 2 2 V
V
IL
Low-level input voltage 0.7 0.8 V
I
OH
High-level output current –1 –2.6 mA
I
OL
Low-level output current 12 24 mA
T
A
Operating free-air temperature –55 125 0 70 °C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN54ALS857 SN74ALS857
PARAMETER
TEST CONDITIONS
MIN TYP‡MAX MIN TYP‡MAX
UNIT
V
IK
VCC = 4.5 V, II = –18 mA –1.5 –1.5 V
VCC = 4.5 V to 5.5 V, IOH = –0.4 mA VCC –2 VCC –2
V
OH
IOH = –1 mA 2.4 3.3
V
V
CC
= 4.5
V
IOH = –2.6 mA 2.4 3.2
IOL = 12 mA 0.25 0.4 0.25 0.4
V
OL
V
CC
= 4.5
V
IOL = 24 mA 0.35 0.5
V
I
OZH
VCC = 5.5 V, VO = 2.7 V 20 20 µA
I
OZL
VCC = 5.5 V, VO = 0.4 V –20 –20 µA
I
I
VCC = 5.5 V, VI = 7 V 0.1 0.1 mA
I
IH
VCC = 5.5 V, VI = 2.7 V 20 20 µA
I
IL
VCC = 5.5 V, VI = 0.4 V –0.2 –0.2 mA
I
O
§
VCC = 5.5 V, VO = 2.25 V –15 –70 –15 –70 mA
Outputs high 11 24 11 24
I
CC
V
CC
=
5.5 V
,
Outputs low 16 33 16 33
mA
See Note 1
Outputs disabled 18 36 18 36
‡
All typical values are at VCC = 5 V, TA = 25°C.
§
The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.
NOTE 1: ICC is measured with all possible inputs grounded while achieving the stated output conditions.
SN54ALS857, SN74ALS857
HEX 2-TO-1 UNIVERSAL MULTIPLEXERS
WITH 3-STATE OUTPUTS
SDAS170A – DECEMBER 1982 – REVISED JANUARY 1995
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
switching characteristics (see Figure 1)
PARAMETER
†
FROM
(INPUT)
TO
(OUTPUT)
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
R1 = 500 Ω
,
R2 = 500 Ω,
TA = MIN to MAX
‡
UNIT
SN54ALS857 SN74ALS857
MIN MAX MIN MAX
A or B (COMP high)
Y (inverting)
2 35 4 25
A or B (COMP low)
Y (noninverting)
2 27 4 18
S0 or S1
2 37 7 33
t
p
d
COMP
Y
2 26 6 18
ns
A or B
2 45 5 37
S0 to S1
OPER
=
0
2 30 5 23
t
en
2 38 7 35
t
dis
S0 to S1
Y
2 43 2 23
ns
t
en
2 37 8 24
t
dis
COMP
Y
2 45 6 21
ns
t
en
2 29 6 20
t
dis
S0
OPER
=
0
2 42 11 27
ns
t
en
2 28 6 25
t
dis
S1
OPER
=
0
2 37 3 19
ns
t
en
2 43 9 25
t
dis
COMP
OPER
=
0
2 36 6 20
ns
†
tpd = t
PLH
or t
PHL
, ten = t
PZH
or t
PZL
, t
dis
= t
PHZ
or t
PLZ
‡
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
SN54ALS857, SN74ALS857
HEX 2-TO-1 UNIVERSAL MULTIPLEXERS
WITH 3-STATE OUTPUTS
SDAS170A – DECEMBER 1982 – REVISED JANUAR Y 1995
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
SERIES 54ALS/74ALS AND 54AS/74AS DEVICES
t
PHZ
t
PLZ
t
PHL
t
PLH
0.3 V
t
PZL
t
PZH
t
PLH
t
PHL
LOAD CIRCUIT
FOR 3-STATE OUTPUTS
From Output
Under Test
Test
Point
R1
S1
C
L
(see Note A)
7 V
1.3 V
1.3 V1.3 V
3.5 V
3.5 V
0.3 V
0.3 V
t
h
t
su
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
Timing
Input
Data
Input
1.3 V 1.3 V
3.5 V
3.5 V
0.3 V
0.3 V
High-Level
Pulse
Low-Level
Pulse
t
w
VOLTAGE WAVEFORMS
PULSE DURATIONS
Input
Out-of-Phase
Output
(see Note C)
1.3 V 1.3 V
1.3 V1.3 V
1.3 V 1.3 V
1.3 V1.3 V
1.3 V
1.3 V
3.5 V
3.5 V
0.3 V
0.3 V
V
OL
V
OH
V
OH
V
OL
Output
Control
(low-level
enabling)
Waveform 1
S1 Closed
(see Note B)
Waveform 2
S1 Open
(see Note B)
[
0 V
V
OH
V
OL
[
3.5 V
In-Phase
Output
0.3 V
1.3 V 1.3 V
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS
R2
V
CC
R
L
Test
Point
From Output
Under Test
C
L
(see Note A)
LOAD CIRCUIT
FOR OPEN-COLLECTOR OUTPUTS
LOAD CIRCUIT FOR
BI-STATE
TOTEM-POLE OUTPUTS
From Output
Under Test
Test
Point
C
L
(see Note A)
R
L
RL = R1 = R2
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
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Copyright 1998, Texas Instruments Incorporated
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