Datasheet

Figure 1. V
IN
versus V
OUT
Transfer Function
5
4
3
2
1
0
0 0.4 0.95 1.2 1.8 2
V
IN
, INPUT VOLTAGE (VOLTS)
V
O
, OUTPUT VOLTAGE (VOLTS)
V
CC
= 5 V
T
A
= 25
° C
5-1
FAST AND LS TTL DATA
QUAD 2-INPUT
SCHMITT TRIGGER NAND GATE
The SN54/74LS132 contains four 2-Input NAND Gates which accept stan-
dard TTL input signals and provide standard TTL output levels. They are ca-
pable of transforming slowly changing input signals into sharply defined, jitter-
free output signals. Additionally, they have greater noise margin than
conventional NAND Gates.
Each circuit contains a 2-input Schmitt trigger followed by a Darlington level
shifter and a phase splitter driving a TTL totem pole output. The Schmitt trigger
uses positive feedback to effectively speed-up slow input transitions, and
provide different input threshold voltages for positive and negative-going tran-
sitions. This hysteresis between the positive-going and negative-going input
thresholds (typically 800 mV) is determined internally by resistor ratios and is
essentially insensitive to temperature and supply voltage variations. As long
as one input remains at a more positive voltage than V
T+
(MAX), the gate will
respond to the transitions of the other input as shown in Figure 1.
14 13 12 11 10 9
123456
V
CC
8
7
GND
LOGIC AND CONNECTION DIAGRAM
DIP (TOP VIEW)
SN54/74LS132
QUAD 2-INPUT
SCHMITT TRIGGER NAND GATE
LOW POWER SCHOTTKY
J SUFFIX
CERAMIC
CASE 632-08
N SUFFIX
PLASTIC
CASE 646-06
14
1
14
1
ORDERING INFORMATION
SN54LSXXXJ Ceramic
SN74LSXXXN Plastic
SN74LSXXXD SOIC
14
1
D SUFFIX
SOIC
CASE 751A-02