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MM54HCT688 NSC | Alldatasheet

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Y Typical propagation delay: 20 ns Y Low quiescent current: 80 mA maximum (74HCT Series) Y Large output current: 4 mA Y Same as HCT521 Logic Diagrams TL/F/5371–2 C1995 National Semiconductor Corporation RRD-B30M105/Printed in U. S. A.

Absolute Maximum Ratings (Notes1&2 ) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. Supply Voltage (V CC) b0.5 to a7.0V DC Input Voltage (V IN) b1.5 to V CCa1.5V DC Output Voltage (V OUT) b0.5 to V CCa0.5V Clamp Diode Current (I IK,I OK) g20 mA DC Output Current, per pin (I OUT) g25 mA DC V CC or GND Current, per pin (I CC) g50 mA Storage Temperature Range (T STG) b65§Ct o a150§C Power Dissipation (P D) (Note 3) 600 mW S.O. Package only 500 mW Lead Temperature (T (Soldering 10 seconds) 260 §C Operating Conditions Min Max Units Supply Voltage (V CC) 4.5 5.5 V DC Input or Output Voltage 0 V CC V (VIN,V OUT) Operating Temp. Range (T A) MM74HCT688 b40 a85 §C MM54HCT688 b55 a125 §C Input Rise or Fall Times (tr,t f) 500 ns TAe25§C 74HCT 54HCT Symbol Parameter Conditions TAeb40 to 85 §CT Aeb55 to 125 §C Units Typ Guaranteed Limits VIH Minimum High Level 2.0 2.0 2.0 V Input Voltage VIL Maximum Low Level 0.8 0.8 0.8 V Input Voltage VOH Minimum High Level V INe0.8V or 2.0V Output Voltage lIOUTle20 mAV CC VCCb0.1 V CCb0.1 V CCb0.1 V VOL Maximum Low Level V INeV0.8V or 2.0V Voltage lIOUTle20 mA 0 0.1 0.1 0.1 V IIN Maximum Input V INeVCC or GND g0.1 g1.0 g1.0 mA Current ICC Maximum Quiescent V INeVCC or GND 8.0 80 160 mA Supply Current I OUTe0 mA Note 1: Absolute Maximum Ratings are those values beyond which damage to the device may occur. Note 2: Unless otherwise specified all voltages are referenced to ground. Note 3: Power Dissipation temperature derating Ð plastic ‘‘N’’ package: b12 mW/ §C from 65 §Ct o8 5 §C; ceramic ‘‘J’’ package: b12 mW/ §C from 100 §Ct o1 2 5 §C. Note 4: Measured per pin. All other inputs held at V CC or ground.

VCC e 5V, T A e 25§C, C L e 15 pF, t r e tf e 6 ns (unless otherwise specified) Symbol Parameter Conditions Typ Guaranteed UnitsLimit tPHL Maximum Propagation 19 30 ns Delay-Po rQt o Output tPLH Maximum Propagation 13 22 ns Delay-Po rQt o Output tPHL Maximum Propagation 13 20 ns Delay - Enable to Output tPHL Maximum Propagation 10 18 ns Delay - Enable to Output VCC e 5V g10%, C L e 50 pF, t r e tf e 6 ns (unless otherwise specified) TAe25§C 74HCT 54HCT Symbol Parameter Conditions TAeb40 to 85 §CT Aeb55 to 125 §C Units Typ Guaranteed Limits tPHL Maximum Propagation 23 35 44 53 ns Delay-Po rQt o Output tPLH Maximum Propagation 16 24 30 36 ns Delay-Po rQt o Output tPHL Maximum Propagation 16 24 30 36 ns Delay - Enable to Output tPLH Maximum Propagation 11 20 25 30 ns Delay - Enable to Output tTHL,t TLH Maximum Output Rise 8 15 19 22 ns and Fall Time CPD Power Dissipation 45 pF Capacitance (Note 5) CIN Maximum Input 5 10 10 10 pF Capacitance Note 5: CPD determines the no load dynamic power consumption, P D e CPD VCC2 f a ICC VCC, and the no load dynamic current consumption, IS e CPD VCC a ICC. Connection Diagram Dual-In-Line Package TL/F/5371–1 Top View Order Number MM54HCT688 or MM74HCT688 Truth Table Inputs Data Enable P eQ P, Q G PeQL L PlQL H PkQL H XHH

MM54HCT688/MM74HCT688 8-Bit Magnitude Comparator (Equality Detector) Physical Dimensions inches (millimeters) Order Number MM54HCT688J or MM74HCT688J Order Number MM74HCT688N NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or 2. A critical component is any component of a life systems which, (a) are intended for surgical implant support device or system whose failure to perform can into the body, or (b) support or sustain life, and whose be reasonably expected to cause the failure of the life failure to perform, when properly used in accordance support device or system, or to affect its safety or with instructions for use provided in the labeling, can effectiveness. be reasonably expected to result in a significant injury to the user. National Semiconductor National Semiconductor National Semiconductor National Semiconductor Corporation Europe Hong Kong Ltd. Japan Ltd.

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