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Updated at 17/06/2025 10:30:15(UTC+8)

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Description

The 74HC161N is a 4-bit presettable synchronous binary counter with asynchronous reset. This high-speed Si-gate CMOS device is pin compatible with low power Schottky TTL (LSTTL). This synchronous presettable binary counter features an internal look-ahead carry and can be used for high-speed counting. Synchronous operation is provided by having all flip-flops clocked simultaneously on the positive-going edge of the clock. The outputs (Q0 to Q3) of the counters may be preset to a high or low level. A low level at the parallel enable input (PE) disables the counting action and causes the data at the data inputs (D0 to D3) to be loaded into the counter on the positive-going edge of the clock (providing that the set-up and hold time requirements for PE are met). Preset takes place regardless of the levels at count enable inputs (CEP and CET). The look-ahead carry simplifies serial cascading of the counters.
Synchronous counting and loading
Two count enable inputs for n-bit cascading
Positive-edge triggered clock
Asynchronous reset
Standard output capability
Complies with JEDEC standard No. 7A

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74HC161N Specifications

Attribute	Attribute Value

Datasheet	Datasheet
3D Model	3D Model
Mounting Style	Through Hole
Number of Pins	16 Pin
Case/Package	DIP
Supply Voltage (DC)	2.00V (min)
Number of Positions	16 Position
Clock Speed	48 MHz
Number of Bits	4 Bit
Operating Temperature (Max)	125 ℃
Operating Temperature (Min)	-40 ℃
Supply Voltage (Max)	6 V
Supply Voltage (Min)	2 V
	Show
Product Lifecycle Status	Unknown
Packaging	Each
RoHS	RoHS Compliant
Lead-Free Status	Lead Free
REACH SVHC Compliance	No SVHC
REACH SVHC Compliance Edition	2015/12/17

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