SN54/74LS158
QUAD 2-INPUT MULTIPLEXER The LSTTL / MSI SN54L / 74LS158 is a high speed Quad 2-input Multiplexer. It selects four bits of data from two sources using the common Select and Enable inputs. The four buffered outputs present the selected data in the inverted form. The LS158 can also generate any four of the 16 different functions of two variables. The LS158 is fabricated with the Schottky barrier diode process for high speed and is completely compatible with all Motorola TTL families.
• • • • • •
QUAD 2-INPUT MULTIPLEXER
Schottky Process for High Speed Multifunction Capability Inverted Outputs Input Clamp Diodes Limit High Speed Termination Effects ESD > 3500 Volts Special Circuitry Ensures Glitch Free Multiplexing
LOW POWER SCHOTTKY
J SUFFIX CERAMIC CASE 620-09
CONNECTION DIAGRAM DIP (TOP VIEW) VCC 16
E 15
I0c 14
I1c 13
Zc
I0d 11
12
I1d 10
Zd 9
16 1
NOTE: The Flatpak version has the same pinouts (Connection Diagram) as the Dual In-Line Package.
1 S
2 I0a
3 I1a
4 Za
5 I0b
6 I1b
7 Zb
N SUFFIX PLASTIC CASE 648-08
16
8 GND
1
PIN NAMES
LOADING (Note a) LOW
HIGH S E I0a – I0d I1a – I1d Za – Zd
Common Select Input Enable (Active LOW) Input Data Inputs from Source 0 Data Inputs from Source 1 Inverted Outputs (Note b)
0.5 U.L. 0.5 U.L. 0.25 U.L. 0.25 U.L. 5 (2.5) U.L.
1.0 U.L. 1.0 U.L. 0.5 U.L. 0.5 U.L. 10 U.L.
D SUFFIX SOIC CASE 751B-03
16 1
ORDERING INFORMATION
NOTES: a) 1 TTL Unit Load (U.L.) = 40 µA HIGH/1.6 mA LOW. b) The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial (74) Temperature Ranges.
SN54LSXXXJ SN74LSXXXN SN74LSXXXD
Ceramic Plastic SOIC
LOGIC DIAGRAM I0a
I1a
2
3
I0b
I1b
5
6
I0c
I1c
14
13
I0d
I1d E S
11
10
15
LOGIC SYMBOL 1
15 2 3 5 6 14 13 11 10
E I0a I1a I0b I1b I0c I1c I0d I1d 1
4
7
Za
9
12
Zb
VCC = PIN 16 GND = PIN 8 = PIN NUMBERS
Zc
Zd
FAST AND LS TTL DATA 5-1
S Za
Zb
Zc
Zd
4
7
12
9
VCC = PIN 16 GND = PIN 8