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SN54/74LS132 QUAD 2-INPUT SCHMITT TRIGGER NAND GATE
The SN54 / 74LS132 contains four 2-Input NAND Gates which accept standard TTL input signals and provide standard TTL output levels. They are capable of transforming slowly changing input signals into sharply defined, jitterfree 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 transitions. 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.
QUAD 2-INPUT SCHMITT TRIGGER NAND GATE
LOW POWER SCHOTTKY
J SUFFIX CERAMIC CASE 632-08
14 1
LOGIC AND CONNECTION DIAGRAM DIP (TOP VIEW)
VCC 14 13 12 11 10 9 8
14 1
N SUFFIX PLASTIC CASE 646-06
14
1
2
3
4
5
6
7 GND
1
D SUFFIX SOIC CASE 751A-02
ORDERING INFORMATION
SN54LSXXXJ SN74LSXXXN SN74LSXXXD Ceramic Plastic SOIC
5 V O , OUTPUT VOLTAGE (VOLTS) 4
VCC = 5 V TA = 25C
3
2
1
0
0
0.4
0.95 1.2 VIN, INPUT VOLTAGE (VOLTS)
1.8
2
Figure 1. VIN versus VOUT Transfer Function
FAST AND LS TTL DATA 5-1
SN54/74LS132
GUARANTEED OPERATING RANGES
Symbol VCC TA IOH IOL Supply Voltage Operating Ambient Temperature Range Output Current -- High Output Current -- Low Parameter 54 74 54 74 54, 74 54 74 Min 4.5 4.75 - 55 0 Typ 5.0 5.0 25 25 Max 5.5 5.25 125 70 - 0.4 4.0 8.0 Unit V C mA mA
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits Symbol S bl VT+ VT- VT + - VT- VIK VOH Parameter P Positive-Going Threshold Voltage Negative-Going Threshold Voltage Hysteresis Input Clamp Diode Voltage 54 Output HIGH Voltage 74 54, 74 VOL IT+ IT- IIH IIL IOS ICC Output LOW Voltage 74 Input Current at Positive-Going Threshold Input Current at Negative-Going Threshold Input HIGH Current 0.1 Input LOW Current Output Short Circuit Current (Note 1) Power Supply Current Total, Output HIGH Total, Output LOW - 20 5.9 8.2 - 0.4 -100 11 14 0.35 - 0.14 - 0.18 20 0.5 V mA mA A mA mA mA mA mA 2.7 3.4 0.25 0.4 V 2.5 Min 1.5 0.6 0.4 0.8 - 0.65 3.4 V - 1.5 Typ Max 2.0 1.1 Unit Ui V V V V Test C di i T Conditions VCC = 5.0 V VCC = 5.0 V VCC = 5.0 V VCC = MIN, IIN = - 18 mA VCC = MIN IOH = - 400 A, VIN = VIL MIN, A VCC = MIN, IOL = 4.0 mA, VIN = 2.0 V VCC = MIN, IOL = 8.0 mA, VIN = 2.0 V VCC = 5.0 V, VIN = VT+ VCC = 5.0 V, VIN = VT- VCC = MAX, VIN = 2.7 V VCC = MAX, VIN = 7.0 V VCC = MAX, VIN = 0.4 V VCC = MAX, VOUT = 0 V VCC = MAX, VIN = 0 V 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 = 25C)
Limits Symbol S bl tPLH tPHL Parameter P Turn-Off Delay, Input to Output Turn-On Delay, Input to Output 3V VIN 0V tPHL tPLH 1.6 V 0.8 V Min Typ Max 22 22 Unit Ui ns ns Test C di i T Conditions VCC = 5.0 V CL = 15 pF
VOUT
1.3 V
1.3 V
Figure 2. AC Waveforms
FAST AND LS TTL DATA 5-2
SN54/74LS132
2 V T , THRESHOLD VOLTAGE (VOLTS) V T, HYSTERESIS (VOLTS) TA = 25C VT+
1.6
1.2 VT- 0.8 VT
0.4
0 4.5
4.75 5 5.25 VCC, POWER SUPPLY VOLTAGE (VOLTS)
5.5
Figure 3. Threshold Voltage and Hysteresis versus Power Supply Voltage
1.9 V T , THRESHOLD VOLTAGE (VOLTS) V T, HYSTERESIS (VOLTS) 1.7 1.5 1.3 1.1 0.9 0.7 - 55 VT- VT 0 25 75 TA, AMBIENT TEMPERATURE (C) VT+
125
Figure 4. Threshold Voltage and Hysteresis versus Temperature
FAST AND LS TTL DATA 5-3

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