Synchronous 4-Bit Binary Counter

This synchronous, presettable, 4-bit binary Counter SN74F163A 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 normally are 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 synchronous, and a low Logic level at the clear (CLR) input sets all four of the Flip-Flop outputs to low after the next low-to-high transition of the Clock regardless of the levels of ENP and ENT. This synchronous clear allows the count length to be modified easily by decoding the Q outputs for the maximum count desired. The active-low output of the Gate used for decoding is connected to the clear input to synchronously clear the Counter to 0000 (LLLL).
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 SN74F163A 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
SN74F163AN3 Rochester Electronics LLC Binary Counter, F/FAST Series, Synchronous, Positive Edge Triggered, 4-Bit, Up Direction, TTL, PDIP16, PLASTIC, MS-001BB, DIP-16
SN74F163ADBRG4 Rochester Electronics LLC Binary Counter, F/FAST Series, Synchronous, Positive Edge Triggered, 4-Bit, Up Direction, TTL, PDSO16, GREEN, PLASTIC, SSOP-16
SN74F163ADBRE4 Rochester Electronics LLC Binary Counter, F/FAST Series, Synchronous, Positive Edge Triggered, 4-Bit, Up Direction, TTL, PDSO16, GREEN, PLASTIC, SSOP-16
SN74F163AD3 Rochester Electronics LLC Binary Counter,
SN74F163ANSRE4 Rochester Electronics LLC Binary Counter, F/FAST Series, Synchronous, Positive Edge Triggered, 4-Bit, Up Direction, TTL, PDSO16, GREEN, PLASTIC, SOP-16
SN74F163ANSRG4 Rochester Electronics LLC Binary Counter, F/FAST Series, Synchronous, Positive Edge Triggered, 4-Bit, Up Direction, TTL, PDSO16, GREEN, PLASTIC, SOP-16
SN74F163ADE4 Rochester Electronics LLC Binary Counter, F/FAST Series, Synchronous, Positive Edge Triggered, 4-Bit, Up Direction, TTL, PDSO16, GREEN, PLASTIC, SOIC-16
SN74F163ADRG4 Rochester Electronics LLC Binary Counter, F/FAST Series, Synchronous, Positive Edge Triggered, 4-Bit, Up Direction, PDSO16, GREEN, PLASTIC, SOIC-16
SN74F163ADRE4 Rochester Electronics LLC Binary Counter, F/FAST Series, Synchronous, Positive Edge Triggered, 4-Bit, Up Direction, TTL, PDSO16, GREEN, PLASTIC, SOIC-16
SN74F163ADG4 Rochester Electronics LLC Counter
SN74F163A 's PackagesSN74F163A 's pdf datasheet
SN74F163AD SOIC
SN74F163ADBR SSOP
SN74F163ADBRG4 SSOP
SN74F163ADE4 SOIC
SN74F163ADG4 SOIC
SN74F163ADR SOIC
SN74F163ADRE4 SOIC
SN74F163ADRG4 SOIC
SN74F163AN PDIP
SN74F163AN3 PDIP
SN74F163ANE4 PDIP
SN74F163ANSR SO
SN74F163ANSRE4 SO
SN74F163ANSRG4 SO




SN74F163A Pinout, Pinouts
SN74F163A pinout,Pin out
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