MC74VHC595 Datasheet, PDF (1/9 Pages) Motorola, Inc – 8-Bit Shift Register with Output Storage Register

MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
8-Bit Shift Register with
Output Storage Register
(3-State)
The MC74VHC595 is an advanced high speed 8–bit shift register with an
output storage register fabricated with silicon gate CMOS technology.
It achieves high speed operation similar to equivalent Bipolar Schottky
TTL while maintaining CMOS low power dissipation.
The MC74VHC595 contains an 8–bit static shift register which feeds an
8–bit storage register.
Shift operation is accomplished on the positive going transition of the Shift
Clock input (SCK). The output register is loaded with the contents of the shift
register on the positive going transition of the Register Clock input (RCK).
Since the RCK and SCK signals are independent, parallel outputs can be
held stable during the shift operation. And, since the parallel outputs are
3–state, the VHC595 can be directly connected to an 8–bit bus. This register
can be used in serial–to–parallel conversion, data receivers, etc.
The internal circuit is composed of three stages, including a buffer output
which provides high noise immunity and stable output. The inputs tolerate
voltages up to 7V, allowing the interface of 5V systems to 3V systems.
• High Speed: fmax = 185MHz (Typ) at VCC = 5V
• Low Power Dissipation: ICC = 4µA (Max) at TA = 25°C
• High Noise Immunity: VNIH = VNIL = 28% VCC
• Power Down Protection Provided on Inputs
• Balanced Propagation Delays
• Designed for 2V to 5.5V Operating Range
• Low Noise: VOLP = 1.0V (Max)
• Pin and Function Compatible with Other Standard Logic Families
• Latchup Performance Exceeds 300mA
• ESD Performance: HBM > 2000V; Machine Model > 200V
• Chip Complexity: 328 FETs or 82 Equivalent Gates
LOGIC DIAGRAM
SERIAL
DATA _SI ¹⁴
INPUT
SHIFT
REGISTER
11
SCK
10
SCLR
12
RCK
13
OE
STORAGE
REGISTER
15 _QA
1 _QB
2 _QC
3 _QD
4 _QE
5 _QF
6 _QG
7 _QH
PARALLEL
DATA
OUTPUTS
9 _SQH
SERIAL
DATA
OUTPUT
MC74VHC595
D SUFFIX
16–LEAD SOIC PACKAGE
CASE 751B–05
DT SUFFIX
16–LEAD TSSOP PACKAGE
CASE 948F–01
M SUFFIX
16–LEAD SOIC EIAJ PACKAGE
CASE 966–01
ORDERING INFORMATION
MC74VHCXXXD
MC74VHCXXXDT
MC74VHCXXXM
SOIC
TSSOP
SOIC EIAJ
PIN ASSIGNMENT
QB 1
QC 2
QD 3
QE 4
QF 5
QG 6
QH 7
GND 8
16 VCC
15 QA
14 SI
13 OE
12 RCK
11 SCK
10 SCLR
9 SQH
6/97
© Motorola, Inc. 1997
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