SN54LS669 Datasheet
SN54LS669 Datasheet (Motorola Semiconductor)
Motorola Semiconductor
SYNCHRONOUS 4-BIT UP/DOWN COUNTER The SN54 / 74LS669 is a synchronous 4-bit up/down counter. The LS669 is a 4-bit binary counter. For high speed counting applications, this presettable counter feature.
an internal carry lookahead for cascading purposes. By clocking all flip-flops simultaneously so the outputs change coincident with each other (when instructed to do so by the count enable inputs and internal gating) synchronous operation is provided. This helps to eliminate output counting spikes, .
SN54LS669 Datasheet (Texas Instruments)
Texas Instruments
SN54LS668, SN54LS669, SN74LS668, SN74LS669 SYNCHRONOUS 4-BIT UP/DOWN COUNTERS SDLS192 – APRIL 1977 – REVISED MARCH 1988 PRODUCTION DATA information is current as of publication date. Products conform.
FFICE BOX 655303 DALLAS, TEXAS 75265
5
SN54LS668, SN54LS669, SN74LS668, SN74LS669 SYNCHRONOUS 4-BIT UP/DOWN COUNTERS
SDLS192
* APRIL 1977
* REVISED MARCH 1988
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* POST OFFICE BOX 655303 DALLAS, TEXAS 75265
SN54LS668, SN54LS669, SN74LS668, SN74LS669 SYNCHRONOUS 4-BIT UP/DOWN COUNTERS
SDLS192
* A.