1. General description

The 74AHC377; 74AHCT377 is a high-speed Si-gate CMOS device and is pin compatible

with Low-power Schottky TTL (LSTTL). It is specified in compliance with JEDEC standard

No. 7-A.

The 74AHC377; 74AHCT377 has eight edge-triggered, D-type flip-flops with individual D

inputs and Q outputs. A common clock input (CP) loads all flip-flops simultaneously when

the data enable input (E) is LOW. The state of each D input, one set-up time before the

LOW-to-HIGH clock transition, is transferred to the corresponding output (Qn) of the

flip-flop. The E input is only required to be stable one set-up time prior to the

LOW-to-HIGH transition for predictable operation.

For versions associated with the 74AHC377; 74AHCT377, refer to the following:

• For the master reset version, see 74AHC273; 74AHCT273

• For the transparent latch version, see 74AHC373; 74AHCT373

• For the 3-state version, see 74AHC374; 74AHCT374

2. Features

n Balanced propagation delays

n All inputs have Schmitt-trigger actions

n Inputs accept voltages higher than VCC

n Ideal for addressable register applications

n Data enable for address and data synchronization

n Eight positive-edge triggered D-type flip-flops

n Input levels:

u For 74AHC377: CMOS level

u For 74AHCT377: TTL level

n ESD protection:

u HBM EIA/JESD22-A114E exceeds 2000 V

u MM EIA/JESD22-A115-A exceeds 200 V

u CDM EIA/JESD22-C101C exceeds 1000 V

n Multiple package options

n Specified from -40 °C to +85 °C and from -40 °C to +125 °C