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74VHC161 Datasheet(PDF) 1 Page - Fairchild Semiconductor

Part No. 74VHC161
Description  4-Bit Binary Counter with Asynchronous Clear
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Manufacturer  FAIRCHILD [Fairchild Semiconductor]
Direct Link  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

74VHC161 Datasheet(HTML) 1 Page - Fairchild Semiconductor

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© 2002 Fairchild Semiconductor Corporation
August 1993
Revised February 2002
4-Bit Binary Counter with Asynchronous Clear
General Description
The VHC161 is an advanced high-speed CMOS device
fabricated with silicon gate CMOS technology. It achieves
the high-speed operation similar to equivalent Bipolar
Schottky TTL while maintaining the CMOS low power dissi-
pation. The VHC161 is a high-speed synchronous modulo-
16 binary counter. This device is synchronously presettable
for application in programmable dividers and have two
types of Count Enable inputs plus a Terminal Count output
for versatility in forming synchronous multistage counters.
The VHC161 has an asynchronous Master Reset input that
overrides all other inputs and forces the outputs LOW. An
input protection circuit insures that 0V to 7V can be applied
to the input pins without regard to the supply voltage. This
device can be used to interface 5V to 3V systems and two
supply systems such as battery backup. This circuit pre-
vents device destruction due to mismatched supply and
input voltages.
s High Speed:
fMAX = 185 MHz (typ) at TA = 25°C
s Synchronous counting and loading
s High-speed synchronous expansion
s Low power dissipation:
ICC = 4 µA (max) at TA = 25°C
s High noise immunity: VNIH = VNIL = 28% VCC (min)
s Power down protection provided on all inputs
s Low noise: VOLP = 0.8V (max)
s Pin and function compatible with 74HC161
Ordering Code:
Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbols
Order Number
Package Number
Package Description
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide

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