Synchronous 4-Bit Binary Counter

This synchronous, presettable, 4-bit binary Counter SN74F161A has internal carry look-ahead circuitry for use in high-speed counting designs. Synchronous operation 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 asynchronous (ripple-clock) Counters However, counting spikes CAN occur on the ripple-carry (RCO) output. A buffered Clock (CLK) input triggers the four Flip-Flops on the rising (positive-going) edge of CLK.
This Counter is fully programmable. That is, it CAN be preset to any number between 0 and 15. Because presetting is synchronous, a low Logic level at the load (LOAD) input disables the Counter and causes the outputs to agree with the setup data after the next Clock pulse, regardless of the levels of ENP and ENT.
The clear function is asynchronous, and a low Logic level at the clear (CLR) input sets all four of the Flip-Flop outputs to low, regardless of the levels of CLK, LOAD, ENP, and ENT.
The carry look-ahead circuitry provides for cascading Counters for n-bit synchronous applications, without additional gating. This function is implemented by the ENP and ENT inputs and an RCO output. Both ENP and ENT must be high to count, and ENT is fed forward to enable RCO. RCO, thus enabled, produces a high-logic-level pulse while the count is 15 (HHHH). The high-logic-level overflow ripple-carry pulse CAN be used to enable successive cascaded stages. Transitions at ENP or ENT are allowed, regardless of the level of CLK.
The SN74F161A features a fully independent Clock circuit. Changes at ENP, ENT, or LOAD that modify the operating mode have no effect on the contents of the Counter until clocking occurs. The function of the Counter (whether enabled, disabled, loading, or counting) is dictated solely by the conditions meeting the setup and hold times.
By Texas Instruments
Part Manufacturer Description Datasheet Samples
SN74F161ADR Texas Instruments Synchronous 4-Bit Binary Counter 16-SOIC 0 to 70
SN74F161ADG4 Texas Instruments F/FAST SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT UP BINARY COUNTER, PDSO16, GREEN, PLASTIC, MS-012AC, SOIC-16
SN74F161AD Texas Instruments Synchronous 4-Bit Binary Counter 16-SOIC 0 to 70
SN74F161AN3 Texas Instruments Synchronous 4-Bit Binary Counter 16-PDIP 0 to 70
SN74F161AN Texas Instruments Synchronous 4-Bit Binary Counter 16-PDIP 0 to 70
SN74F161ANE4 Texas Instruments Synchronous 4-Bit Binary Counter 16-PDIP 0 to 70
SN74F161ANSR Texas Instruments Synchronous 4-Bit Binary Counter 16-SO 0 to 70
SN74F161ADE4 Texas Instruments F/FAST SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT UP BINARY COUNTER, PDSO16, GREEN, PLASTIC, MS-012AC, SOIC-16
SN74F161ANSRG4 Texas Instruments F/FAST SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT UP BINARY COUNTER, PDSO16, GREEN, PLASTIC, SOP-16
SN74F161ADBRG4 Texas Instruments IC F/FAST SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT UP BINARY COUNTER, PDSO16, GREEN, PLASTIC, SSOP-16, Counter
SN74F161A 's PackagesSN74F161A 's pdf datasheet
SN74F161AD SOIC
SN74F161ADBR SSOP
SN74F161ADBRE4 SSOP
SN74F161ADBRG4 SSOP
SN74F161ADE4 SOIC
SN74F161ADG4 SOIC
SN74F161ADR SOIC
SN74F161ADRE4 SOIC
SN74F161ADRG4 SOIC
SN74F161AN PDIP
SN74F161AN3 PDIP
SN74F161ANE4 PDIP
SN74F161ANSR SO
SN74F161ANSRE4 SO
SN74F161ANSRG4 SO




SN74F161A Pinout, Pinouts
SN74F161A pinout,Pin out
This is one package pinout of SN74F161A,If you need more pinouts please download SN74F161A's pdf datasheet.

SN74F161A circuits will be updated soon..., now you can download the pdf datasheet to check the circuits!

Related Electronics Part Number

Related Keywords:

SN74F161A Pb-Free SN74F161A Cross Reference SN74F161A Schematic SN74F161A Distributor
SN74F161A Application Notes SN74F161A RoHS SN74F161A Circuits SN74F161A footprint