SN74HCT374 Octal D-type Edge-Triggered Flip-Flops With 3-State Outputs | TI.com

SN74HCT374
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Octal D-type Edge-Triggered Flip-Flops With 3-State Outputs

Octal D-type Edge-Triggered Flip-Flops With 3-State Outputs - SN74HCT374
Datasheet
 

Description

These 8-bit flip-flops feature 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. They are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.

The eight flip-flops of the ’HCT374 devices are edge-triggered D-type flip-flops. On the positive transition of the clock (CLK) input, the Q outputs are set to the logic levels that were set up at the data (D) inputs.

An output-enable (OE)\ input places the eight outputs in either a normal logic state (high or low logic levels) or the high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines without interface or pullup components.

(OE)\ does not affect the internal operations of the flip-flops. Old data can be retained or new data can be entered while the outputs are in the high-impedance state.

Features

  • Operating Voltage Range of 4.5 V to 5.5 V
  • High-Current 3-State True Outputs Can Drive 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
  • Eight D-Type Flip-Flops in a Single Package
  • Full Parallel Access for Loading

Parametrics

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Part number Order Technology Family Input type Output type VCC (Min) (V) VCC (Max) (V) IOL (Max) (mA) IOH (Max) (mA) Rating Package Group
SN74HCT374 Order now HCT     TTL     CMOS     4.5     5.5     6     -6     Catalog     PDIP | 20
SOIC | 20
SO | 20
SSOP | 20
TSSOP | 20    
SN54HCT374 Samples not available HCT     TTL     CMOS     4.5     5.5     6     -6     Military     CDIP | 20
LCCC | 20