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. LOW POWER SCHOTTKY 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 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 CASE 751A-02 1 1 2 3 4 5 6 7 GND ORDERING INFORMATION SN54LSXXXJ Ceramic SN74LSXXXN Plastic SN74LSXXXD SOIC 5 VCC = 5 V ) TA = 25°C S 4 T L O V ( E G A 3 T L O V T U 2 P T U O , O 1 V 0 0 0.4 0.95 1.2 1.8 2 VIN, INPUT VOLTAGE (VOLTS) Figure 1. VIN versus VOUT Transfer Function FAST AND LS TTL DATA 5-1 SN54/74LS132 GUARANTEED OPERATING RANGES Symbol Parameter Min Typ Max Unit VCC Supply Voltage 54 4.5 5.0 5.5 V 74 4.75 5.0 5.25 TA Operating Ambient Temperature Range 54 –55 25 125 °C 74 0 25 70 IOH Output Current — High 54, 74 –0.4 mA IOL Output Current — Low 54 4.0 mA 74 8.0 DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified) Limits SSymbolb l PParameter Min Typ Max UUniti TTest ConditionsC di i 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, I IN = –18 mA 54 2.5 3.4 VVOHOH OutputOutput HIGHHIGH VVoltageoltage VV VVCCCC == MINMIN, IIOHOH = –= –400400 µµAA, VVININ == VVILIL 74 2.7 3.4 54, 74 0.25 0.4 V VCC = MIN, IOL = 4.0 mA, VIN = 2.0 V VVOL OutputOutput LOWLOW VVoltageoltage OL 74 0.35 0.5 V VCC = MIN, IOL = 8.0 mA, VIN = 2.0 V Input Current at Positive-Going IT+ Threshold –0.14 mA VCC = 5.0 V, V IN = VT+ Input Current at Negative-Going IT– Threshold –0.18 mA VCC = 5.0 V, V IN = VT– 20 µA VCC = MAX, V IN = 2.7 V IIIH InputInput HIGHHIGH CCurrenturrent IH 0.1 mA VCC = MAX, V IN = 7.0 V IIL Input LOW Current –0.4 mA VCC = MAX, V IN = 0.4 V IOS Output Short Circuit Current (Note 1) –20 –100 mA VCC = MAX, VOUT = 0 V Power Supply Current I Total, Output HIGH 5.9 11 mA VCC = MAX, V IN = 0 V ICC CC Total, Output LOW 8.2 14 mA VCC = MAX, V IN = 4.5 V Note 1: Not more than one output should be shorted at a time, nor for more than 1 second. AC CHARACTERISTICS (T = 25°C) A Limits SSymbolb l PParameter Min Typ Max UUniti TTest ConditionsC di i tPLH Turn-Off Delay, Input to Output 22 ns VCC = 5.0 V CC C = 15 pF tPHL Turn-On Delay, Input to Output 22 ns L 3 V VIN 1.6 V 0.8 V 0 V tPHL tPLH VOUT 1.3 V 1.3 V Figure 2. AC Waveforms FAST AND LS TTL DATA 5-2 SN54/74LS132 2 TA = 25°C ) S T VT+ L ) O S 1.6 V T ( L E O G V ( A T S L I 1.2 S O E V R D E VT– L T O S H Y 0.8 S H, ∆ VT E R T V H T ∆ , 0.4 T V 0 4.5 4.75 5 5.25 5.5 VCC, POWER SUPPLY VOLTAGE (VOLTS) Figure 3. Threshold Voltage and Hysteresis versus Power Supply Voltage 1.9 ) S T 1.7 V L ) T+ O S V T ( L E O G V ( 1.5 A T S L I S O E V R 1.3 D E L T O S H Y S H E , 1.1 R T V H T ∆ , V T 0.9 T– V ∆ VT 0.7 – 55° 0° 25° 75° 125° TA, AMBIENT TEMPERATURE (°C) Figure 4. Threshold Voltage and Hysteresis versus Temperature FAST AND LS TTL DATA 5-3