Datasheet
1. General description
The 74LVC595A is an 8-bit serial-in/serial or parallel-out shift register with a storage
register and 3-state outputs. Both the shift and storage register have separate clocks.
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.
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.
The shift register has a serial input (DS) and a serial output (Q7S) for cascading
purposes. It is also provided with asynchronous reset input MR
(active LOW) for all 8 shift
register stages. The storage register has 8 parallel 3-state bus driver outputs. Data in the
storage register appears at the output whenever the output enable input (OE
) is LOW.
2. Features and benefits
5 V tolerant inputs/outputs for interfacing with 5 V logic
Wide supply voltage range from 1.2 V to 3.6 V
CMOS low-power consumption
Direct interface with TTL levels
Balanced propagation delays
All inputs have Schmitt-trigger action
Complies with JEDEC standard JESD8-B/JESD36
ESD protection:
HBM JESD22-A114-D exceeds 2000 V
CDM JESD22-C101-C exceeds 1000 V
Specified from 40 C to +85 C and 40 C to +125 C.
3. Applications
Serial-to-parallel data conversion
Remote control holding register
74LVC595A
8-bit serial-in/serial-out or parallel-out shift register; 3-state
Rev. 2 — 20 June 2014 Product data sheet