74AHCT594
8-BIT SHIFT REGISTER WITH 8-BIT OUTPUT REGISTER
Description
Pin Assignments
The 74AHCT594 is an advanced high speed CMOS device that is
( Top View )
designed to be pin compatable with 74LS low power Schottky types.
Q1
1
16
Vcc
asserted low the shift register reset function (SHR) sets all shift
Q2
2
15
Q0
register values to zero and is independent of all clocks. Also when
Q3
3
14
DS
register values to zero and is independent of all clocks.
Q4
4
13
STR
Data from the input serial shift register is placed in the output register
Q5
5
12
STCP
Q6
6
11
SHCP
Q7
7
10
SHR
8
9
Q7S
An eight bit shift register accepts data from the serial input (DS) on
each positive transition of the shift register clock (SHCP).
When
asserted low, the storage register reset function (STR) sets all shift
with a rising pulse on the storages resister clock (STCP).
The
storage resister includes output Q7S which is used for cascading
information between devices. As the information moves into the
storage register, it is asserted on the push-pull outputs Q0-Q7.
GND
All registers capture data on rising edge and change output on the
SO-16 / TSSOP-16
falling edge. If both clocks are connected together, the input shift
register is always one clock cycle ahead of the output register.
Features
Applications
Wide Supply Voltage Range from 4.5V to 5.5V
Sinks or sources 8mA at VCC = 4.5V
General Purpose Logic
Serial to Parallel Data conversion
CMOS low power consumption
Capture and hold data for extended periods of time.
Schmitt Trigger Action at All Inputs
Inputs accept up to 6.0V
Allow simple serial bit streams from a microcontroller to control as
many peripheral lines as needed.
ESD Protection Tested per JESD 22
Wide array of products such as:
Exceeds 200-V Machine Model (A115-A)
Computer Peripherals
Exceeds 2000-V Human Body Model (A114-A)
Appliances
Exceeds 1000-V Charged Device Model (C101C)
Industrial control
Latch-Up Exceeds 250mA per JESD 78, Class II
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain
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