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SN54HCT574, SN74HCT574
SCLS177G – MARCH 1984 – REVISED JULY 2022
SNx4HCT574 Octal Edge-Triggered D-Type Flip-Flips With 3-State Outputs
1 Features
• Operating voltage range of 4.5 V to 5.5 V • High-current 3-state noninverting outputs drive bus
lines directly or up to 15 LSTTL loads • Low power consumption, 80-μA max ICC • Typical tpd = 22 ns • ±6-mA output drive at 5 V • Low input current of 1 μA max • Inputs are TTL-voltage compatible • Bus-structured pinout
2 Description
These octal edge-triggered D-type flip-flops feature 3-state outputs designed specifically for bus driving. The ’HCT574 devices are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.