74LVC594A Datasheet, PDF (1/19 Pages) NXP Semiconductors – 8-bit shift register with output register

74LVC594A
8-bit shift register with output register
Rev. 01 — 24 May 2007
Product data sheet
1. General description
The 74LVC594A is an 8-bit serial-in/serial or parallel-out shift register with a storage
register. Separate clock and reset inputs are provided on both shift and storage registers.
The input can be driven from either 3.3 V or 5 V devices. This feature allows the use of
this device in a mixed 3.3 V and 5 V environment.
This device is fully specified for partial Power-down applications using I_OFF.
The I_OFF circuitry disables the output, preventing the damaging backflow current through
the device when it is powered down.
The shift register has a serial input (DS) and a serial output (Q7S) for cascading
purposes. Data is shifted on the positive-going transitions of the SHCP input. The data in
the shift register is transferred to the storage register on a positive-going transition of the
STCP input. If both clocks are connected together, the shift register will always be one
clock pulse ahead of the storage register. A LOW level on one of the two register reset
pins (SHR and STR) will clear the corresponding register.
2. Features
s 5 V tolerant inputs/outputs for interfacing with 5 V logic
s Wide supply voltage range from 1.2 V to 3.6 V
s CMOS low-power consumption
s Direct interface with TTL levels
s Balanced propagation delays
s All inputs have Schmitt-trigger action
s Complies with JEDEC standard JESD8-B/JESD36
s ESD protection:
x HBM JESD22-A114-D exceeds 2000 V
x CDM JESD22-C101-C exceeds 1000 V
s Specified from −40 °C to +85 °C and −40 °C to +125 °C.
3. Applications
s Serial-to-parallel data conversion
s Remote control holding register