SN74AHC595-Q1 Datasheet, PDF (1/11 Pages) Texas Instruments – 8-BIT SHIFT REGISTER WITH 3-STATE OUTPUT REGISTERS

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FEATURES
1
• Qualified for Automotive Applications
• Operating Range 2-V to 5.5-V V_CC
• 8-Bit Serial-In, Parallel-Out Shift
• Shift Register Has Direct Clear
SN74AHC595-Q1
8-BIT SHIFT REGISTER
WITH 3-STATE OUTPUT REGISTERS
SCLS537B – AUGUST 2003 – REVISED JANUARY 2008
PW PACKAGE
(TOP VIEW)
Q_B 1
Q_C 2
Q_D 3
Q_E 4
Q_F 5
Q_G 6
Q_H 7
GND 8
16 VCC
15 Q_A
14 SER
13 OE
12 RCLK
11 SRCLK
10 SRCLR
9 Q_H′
DESCRIPTION/ORDERING INFORMATION
The SN74AHC595 contains an 8-bit serial-in, parallel-out shift register that feeds an 8-bit D-type storage register.
The storage register has parallel 3-state outputs. Separate clocks are provided for both the shift and storage
registers. The shift register has a direct overriding clear (SRCLR) input, serial (SER) input, and a serial output for
cascading. When the output-enable (OE) input is high, all outputs, except Q_H', are in the high-impedance state.
Both the shift-register clock (SRCLK) and storage-register clock (RCLK) are positive-edge triggered. If both
clocks are connected together, the shift register always is one clock pulse ahead of the storage register.
T_A
–40°C to 125°C
TSSOP – PW
ORDERING INFORMATION⁽¹⁾
PACKAGE ⁽²⁾
ORDERABLE PART NUMBER
Reel of 2000
SN74AHC595QPWRQ1
TOP-SIDE MARKING
HA595Q
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
(2) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
SER
X
X
X
L
H
X
SRCLK
X
X
X
↑
↑
X
INPUTS
SRCLR
X
X
L
H
H
X
RCLK
X
X
X
X
X
↑
FUNCTION TABLE
FUNCTION
OE
H
Outputs Q_A–Q_H are disabled.
L
Outputs Q_A–Q_H are enabled.
X
Shift register is cleared.
X
First stage of the shift register goes low.
Other stages store the data of previous stage, respectively.
X
First stage of the shift register goes high.
Other stages store the data of previous stage, respectively.
X
Shift-register data is stored into the storage register.
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2003–2008, Texas Instruments Incorporated