Product Summary

The SN74HC161D is a 4-bit synchronous binary counter. The SN74HC161D features an internal carry look-ahead for application in high-speed counting designs. The SN74HC161D is provided by having all flip-flops clocked simultaneously so that the outputs change coincident with each other when so instructed by the count-enable (ENP, ENT) inputs and internal gating. This mode of operation eliminates the output counting spikes that are normally associated with synchronous (ripple-clock) counters. A buffered clock (CLK) input triggers the four flip-flops on the rising (positive-going) edge of the clock waveform.

Parametrics

SN74HC161D absolute maximum ratings: (1)Supply voltage range, VCC: 0.5 V to 7 V; (2)Input clamp current, IIK (VI < 0 or VI > VCC): ±20 mA; (3)Output clamp current, IOK (VO < 0 or VO > VCC): ±20 mA; (4)Continuous output current, IO (VO = 0 to VCC): ±25 mA; (5)Continuous current through VCC or GND: ±50 mA; (6)Package thermal impedance, θJA: D package: 73℃/W; (7)N package: 67℃/W; (8)NS package: 64℃/W; (9)PW package: 108℃/W; (10)Storage temperature range, Tstg: -65℃ to 150℃.

Features

SN74HC161D features: (1)Wide Operating Voltage Range of 2 V to 6 V; (2)Outputs Can Drive Up To 10 LSTTL Loads; (3)Low Power Consumption, 80-μA Max ICC; (4)Typical tpd = 14 ns; (5)±4-mA Output Drive at 5 V Low Input Current of 1 μA Max; (6)Internal Look-Ahead for Fast Counting; (7)Carry Output for n-Bit Cascading; (8)Synchronous Counting; (9)Synchronously Programmable.

Diagrams

SN74HC161D block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
SN74HC161D
SN74HC161D

Texas Instruments

Counter ICs 4-Bit Synch Binary

Data Sheet

0-1: $0.29
1-25: $0.22
25-100: $0.16
100-250: $0.15
SN74HC161DE4
SN74HC161DE4

Texas Instruments

Counter ICs 4-Bit Synchronous Binary Counters

Data Sheet

0-1: $0.25
1-25: $0.19
25-100: $0.16
100-250: $0.11
SN74HC161DG4
SN74HC161DG4

Texas Instruments

Counter ICs 4B SYNC Binary Counters

Data Sheet

0-1: $0.29
1-25: $0.22
25-100: $0.18
100-250: $0.11
SN74HC161DR
SN74HC161DR

Texas Instruments

Counter ICs 4-Bit Synchronous Binary Counters

Data Sheet

0-1: $0.29
1-25: $0.19
25-100: $0.16
100-250: $0.13
SN74HC161DRG4
SN74HC161DRG4

Texas Instruments

Counter ICs 4B SYNC Binary Counters

Data Sheet

0-1: $0.21
1-25: $0.16
25-100: $0.13
100-250: $0.12
SN74HC161DRE4
SN74HC161DRE4

Texas Instruments

Counter ICs 4-Bit Synchronous Binary Counters

Data Sheet

0-1: $0.21
1-25: $0.16
25-100: $0.13
100-250: $0.12
SN74HC161DTE4
SN74HC161DTE4

Texas Instruments

Counter ICs 4-Bit Synchronous Binary Counters

Data Sheet

0-1: $0.48
1-25: $0.37
25-100: $0.33
100-250: $0.22
SN74HC161DTG4
SN74HC161DTG4

Texas Instruments

Counter ICs 4B SYNC Binary Counters

Data Sheet

0-1: $0.48
1-25: $0.37
25-100: $0.33
100-250: $0.22