Figure 1. VIN versus VOUT Transfer Function
°
5-212
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 VT+ (MAX), the gate will
respond to the transitions of the other input as shown in Figure 1.
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
5-213
FAST AND LS TTL DATA
SN54/74LS132
GUARANTEED OPERATING RANGES
Symbol Parameter Min Typ Max Unit
VCC Supply Voltage 54
74 4.5
4.75 5.0
5.0 5.5
5.25 V
TAOperating Ambient Temperature Range 54
74 –55
025
25 125
70 °C
IOH Output Current — High 54, 74 –0.4 mA
IOL Output Current — Low 54
74 4.0
8.0 mA
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Symbol
Parameter
Limits
Unit
Test Conditions
Symbol
Parameter
Min Typ Max
Unit
Test Conditions
VT+ Positive-Going Threshold Voltage 1.5 2.0 V VCC = 5.0 V
VT– Negative-Going Threshold Voltage 0.6 1.1 V VCC = 5.0 V
VT+ – VT– Hysteresis 0.4 0.8 V VCC = 5.0 V
VIK Input Clamp Diode Voltage –0.65 –1.5 V VCC = MIN, IIN = –18 mA
VOH
Output HIGH Voltage
54 2.5 3.4
V
VCC = MIN, IOH = –400 µA, VIN = VIL
VOH
Output HIGH Voltage
74 2.7 3.4
V
VCC = MIN, IOH = –400 µA, VIN = VIL
VOL
Output LOW Voltage
54, 74 0.25 0.4 V VCC = MIN, IOL = 4.0 mA, VIN = 2.0 V
VOL
Output LOW Voltage
74 0.35 0.5 V VCC = MIN, IOL = 8.0 mA, VIN = 2.0 V
IT+ Input Current at Positive-Going
Threshold –0.14 mA VCC = 5.0 V, VIN = VT+
IT– Input Current at Negative-Going
Threshold –0.18 mA VCC = 5.0 V, VIN = VT–
IIH
Input HIGH Current
20 µA VCC = MAX, VIN = 2.7 V
IIH
Input HIGH Current
0.1 mA VCC = MAX, VIN = 7.0 V
IIL Input LOW Current –0.4 mA VCC = MAX, VIN = 0.4 V
IOS Output Short Circuit Current (Note 1) –20 –100 mA VCC = MAX, VOUT = 0 V
I
CC
Power Supply Current
Total, Output HIGH 5.9 11 mA VCC = MAX, VIN = 0 V
ICC
Total, Output LOW 8.2 14 mA VCC = MAX, VIN = 4.5 V
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
AC CHARACTERISTICS (TA = 25°C)
Symbol
Parameter
Limits
Unit
Test Conditions
Symbol
Parameter
Min Typ Max
Unit
Test Conditions
tPLH Turn-Off Delay, Input to Output 22 ns
V
CC = 5.0 V
CL = 15 pF
tPHL Turn-On Delay, Input to Output 22 ns
VCC = 5.0 V
CL = 15 pF
Figure 2. AC Waveforms
5-214
FAST AND LS TTL DATA
SN54/74LS132
Figure 3. Threshold Voltage and Hysteresis
versus Power Supply Voltage
Figure 4. Threshold Voltage and Hysteresis
versus Temperature
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5-215
FAST AND LS TTL DATA
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5-216
FAST AND LS TTL DATA
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