PDF 54AC169 Data sheet ( Hoja de datos )

Número de pieza	54AC169
Descripción	4-Stage Synchronous Bidirectional Counter
Fabricantes	National Semiconductor
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No Preview Available ! www.DataSheet4U.com July 1998 54AC169 • 54ACT169 4-Stage Synchronous Bidirectional Counter General Description The ’AC/’ACT169 is fully synchronous 4-stage up/down counter. The ’AC/’ACT169 is a modulo-16 binary counter. It features a preset capability for programmable operation, carry lookahead for easy cascading and a U/D input to con- trol the direction of counting. All state changes, whether in counting or parallel loading, are initiated by the LOW-to-HIGH transition of the Clock. n Synchronous counting and loading n Built-In lookahead carry capability n Presettable for programmable operation n Outputs source/sink 24 mA n ’ACT has TTL-compatible inputs n Standard Microcircuit Drawing (SMD) 5962-91603 Features n ICC reduced by 50% Logic Symbols DS100276-1 IEEE/IEC Pin Names CEP CET CP P0– P3 PE U/D Q0– Q3 TC Description Count Enable Parallel Input Count Enable Trickle Input Clock Pulse Input Parallel Data Inputs Parallel Enable Input Up-Down Count Control Input Flip-Flop Outputs Terminal Count Output DS100276-2 FACT™ is a trademark of Fairchild Semiconductor Corporation. © 1998 National Semiconductor Corporation DS100276 www.national.com 1 page DC Characteristics for ’AC Family Devices (Continued) Symbol Parameter IOLD IOHD ICC Minimum Dynamic Output Current (Note 3) Maximum Quiescent Supply Current 54AC VCC TA = (V) −55˚C to +125˚C Guaranteed Limits 5.5 50 5.5 −50 5.5 80.0 Note 2: All outputs loaded; thresholds on input associated with output under test. Note 3: Maximum test duration 2.0 ms, one output loaded at a time. Note 4: IIN and ICC @ 3.0V are guaranteed to be less than or equal to the respective limit @ 5.5V VCC. ICC for 54AC @ 25˚C is identical to 74AC @ 25˚C. DC Characteristics for ’ACT Family Devices Symbol Parameter VIH Minimum High Level Input Voltage VIL Maximum Low Level Input Voltage VOH Minimum High Level Output Voltage 54ACT VCC TA = (V) −55˚C to +125˚C Guaranteed Limits 4.5 2.0 5.5 2.0 4.5 0.8 5.5 0.8 4.5 4.4 5.5 5.4 Units mA mA µA Units V V V VOL Maximum Low Level Output Voltage 4.5 5.5 4.5 5.5 3.70 4.70 0.1 0.1 V V IIN ICCT IOLD IOHD ICC Maximum Input Leakage Current Maximum ICC/Input Minimum Dynamic Output Current (Note 6) Maximum Quiescent Supply Current 4.5 5.5 5.5 5.5 5.5 5.5 5.5 Note 5: All outputs loaded; thresholds on input associated with output under test. Note 6: Maximum test duration 2.0 ms, one output loaded at a time. Note 7: ICC for 54ACT @ 25˚C is identical to 74ACT @ 25˚C. 0.50 0.50 ±1.0 1.6 50 −50 80.0 V µA mA mA mA µA Conditions VOLD = 1.65V Max VOHD = 3.85V Min VIN = VCC or GND Conditions VOUT = 0.1V or VCC − 0.1V VOUT = 0.1V or VCC − 0.1V IOUT = −50 µA (Note 5) VIN = VIL or VIH IOH = −24 mA IOH = −24 mA IOUT = 50 µA (Note 5) VIN = VIL or VIH IOL = 24 mA IOL = 24 mA VI = VCC, GND VI = VCC − 2.1V VOLD = 1.65V Max VOHD = 3.85V Min VIN = VCC or GND 5 www.national.com 5 Page

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