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SN54/74LS132
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- QUAD 2-INPUT
free output signals. Additionally, they have greater noise margin than SCHMITT TRIGGER NAND GATE
conventional NAND Gates.
Each circuit contains a 2-input Schmitt trigger followed by a Darlington level LOW POWER SCHOTTKY
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
J SUFFIX
essentially insensitive to temperature and supply voltage variations. As long
CERAMIC
as one input remains at a more positive voltage than VT+ (MAX), the gate will CASE 632-08
respond to the transitions of the other input as shown in Figure 1. 14
1
LOGIC AND CONNECTION DIAGRAM
DIP (TOP VIEW)
N SUFFIX
VCC PLASTIC
14 13 12 11 10 9 8 14 CASE 646-06
1
D SUFFIX
SOIC
14
1 CASE 751A-02
1 2 3 4 5 6 7
GND
ORDERING INFORMATION
SN54LSXXXJ Ceramic
SN74LSXXXN Plastic
SN74LSXXXD SOIC
5
VCC = 5 V
TA = 25