High-Speed CMOS Logic Presettable Counters
The CD54HCT161 is obsolete and no longer is supplied.
Data sheet acquired from Harris Semiconductor SCHS154D
February 19...
Description
The CD54HCT161 is obsolete and no longer is supplied.
Data sheet acquired from Harris Semiconductor SCHS154D
February 1998 - Revised October 2003
CD54/74HC161, CD54/74HCT161, CD54/74HC163, CD54/74HCT163
High-Speed CMOS Logic Presettable Counters
[ /Title (CD74 HC161 , CD74 HCT16 1, CD74 HC163 , CD74 HCT16 3) /Subject (High Speed CMOS Logic Presettable Counte rs) /Autho r () /Keywords (High Speed CMOS Logic Presettable Counte rs, High Speed
Features
’HC161, ’HCT161 4-Bit Binary Counter, Asynchronous Reset
’HC163, ’HCT163 4-Bit Binary Counter, Synchronous Reset
Synchronous Counting and Loading
Two Count Enable Inputs for n-Bit Cascading
Look-Ahead Carry for High-Speed Counting
Fanout (Over Temperature Range) - Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads - Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
Wide Operating Temperature Range . . . -55oC to 125oC
Balanced Propagation Delay and Transition Times
Significant Power Reduction Compared to LSTTL Logic ICs
HC Types - 2V to 6V Operation - High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V
HCT Types - 4.5V to 5.5V Operation - Direct LSTTL Input Logic Compatibility, VIL= 0.8V (Max), VIH = 2V (Min) - CMOS Input Compatibility, Il ≤ 1µA at VOL, VOH
Description
Two count enables, PE and TE, in each counter are provided for n-bit cascading. In all counters reset action occurs regardless of the level of the SPE, PE and TE inputs (and the clock input, CP, in the ’HC161 and...
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