Dual Decade Counter; Dual 4-stage Binary Counter , IncThe SN54LS390
SN74LS390 SN74LS390 SN54LS393 SN74LS393 SN74LS393 each contain a pair of high-speed
4-stage ripple Counters Each half of the LS390 is partitioned into a
divide-by-two section and a divide-by five section, with a separate Clock input
for each section. The two sections CAN be connected to count in the 8.4.2.1
BCD code or they CAN count in a biquinary sequence to provide a square wave
(50% duty cycle) at the final output.
Each half of the LS393 operates as a Modulo-16 binary divider, with the last
three stages triggered in a ripple fashion. In both the LS390 and the LS393,
the Flip-Flops are triggered by a HIGH-to-LOW transition of their CP inputs.
Each half of each circuit type has a Master Reset input which responds to a
HIGH signal by forcing all four outputs to the LOW state. By Freescale Semiconductor, Inc
|
Part | Manufacturer | Description | Datasheet | Samples | |
---|---|---|---|---|---|
SN54LS390J | Texas Instruments | Dual 4-Bit Decade And Binary Counters 16-CDIP -55 to 125 |
|
SN54LS390 Pb-Free | SN54LS390 Cross Reference | SN54LS390 Schematic | SN54LS390 Distributor |
SN54LS390 Application Notes | SN54LS390 RoHS | SN54LS390 Circuits | SN54LS390 footprint |