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74HC/HCT377; Octal D-type flip-flop with data enable; positive-edge trigger
Philips Semiconductors Product specification
Octal D-type flip-flop with data enable;
positive-edge trigger 74HC/HCT377
FEATURES Ideal for addressable register applications Data enable for address and data synchronization
applications Eight positive-edge triggered D-type flip-flops See “273” for master reset version See “373” for transparent latch version See “374” for 3-state version Output capability: standard ICC category: MSI
GENERAL DESCRIPTIONThe 74HC/HCT377 are high-speed Si-gate CMOS devices
and are pin compatible with low power Schottky TTL
(LSTTL). They are specified in compliance with JEDEC
standard no. 7A.
The 74HC/HCT377 have eight edge-triggered, D-type
flip-flops with individual D inputs and Q outputs. A common
clock (CP) input loads all flip-flops simultaneously when
the data enable (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.
TheE input must be stable only one set-up time prior to the
LOW-to-HIGH transition for predictable operation.
QUICK REFERENCE DATAGND=0 V; Tamb =25 °C; tr =tf= 6 ns
Notes CPD is used to determine the dynamic power dissipation (PD in μW): =CPD× VCC2×fi +∑ (CL× VCC2× fo) where:= input frequency in MHz= output frequency in MHz (CL× VCC2×fo)= sum of outputs= output load capacitance in pF
VCC= supply voltage in V For HC the condition is VI= GND to VCC
For HCT the condition is VI= GND to VCC− 1.5V
ORDERING INFORMATIONSee “74HC/HCT/HCU/HCMOS Logic Package Information”.
Philips Semiconductors Product specification
Octal D-type flip-flop with data enable;
positive-edge trigger 74HC/HCT377
PIN DESCRIPTION
Philips Semiconductors Product specification
Octal D-type flip-flop with data enable;
positive-edge trigger 74HC/HCT377
FUNCTION TABLE
Notes H= HIGH voltage level= HIGH voltage level one set-up time
prior to the LOW-to-HIGH CP transition= LOW voltage level = LOW voltage level one set-up time
prior to the LOW-to-HIGH CP transition= LOW-to-HIGH CP transition= don’t care
Philips Semiconductors Product specification
Octal D-type flip-flop with data enable;
positive-edge trigger 74HC/HCT377
DC CHARACTERISTICS FOR 74HCFor the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
ICC category: MSI
AC CHARACTERISTICS FOR 74HCGND=0 V; tr =tf=6 ns; CL =50pF
Philips Semiconductors Product specification
Octal D-type flip-flop with data enable;
positive-edge trigger 74HC/HCT377
DC CHARACTERISTICS FOR 74HCTFor the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
ICC category: MSI
Note to HCT typesThe value of additional quiescent supply current (ΔICC) for a unit load of 1 is given in the family specifications.
To determine ΔICC per input, multiply this value by the unit load coefficient shown in the table below.
AC CHARACTERISTICS FOR 74HCTGND=0 V; tr =tf=6 ns; CL =50pF
