SEMICONDUCTOR TECHNICAL DATA
1
REV 1
Motorola, Inc. 1997
6/97
"
! !
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: f
max
= 185MHz (Typ) at VCC = 5V
• Low Power Dissipation: ICC = 4µA (Max) at TA = 25°C
• High Noise Immunity: V
NIH
= V
NIL
= 28% V
CC
• Power Down Protection Provided on Inputs
• Balanced Propagation Delays
• Designed for 2V to 5.5V Operating Range
• Low Noise: V
OLP
= 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
INPUT
14
11
10
12
13
SCK
SCLR
RCK
OE
SHIFT
REGISTER
STORAGE
REGISTER
15
1
2
3
4
5
6
7
9
QA
QB
QC
QD
QE
QF
QG
QH
SQH
SI
PARALLEL
DATA
OUTPUTS
SERIAL
DATA
OUTPUT
PIN ASSIGNMENT
13
14
15
16
9
10
11
125
4
3
2
1
8
7
6
RCK
OE
SI
QA
VCC
SQH
SCLR
SCK
QE
QD
QC
QB
GND
QH
QG
QF
D SUFFIX
16–LEAD SOIC PACKAGE
CASE 751B–05
DT SUFFIX
16–LEAD TSSOP PACKAGE
CASE 948F–01
ORDERING INFORMATION
MC74VHCXXXD
MC74VHCXXXDT
MC74VHCXXXM
SOIC
TSSOP
SOIC EIAJ
M SUFFIX
16–LEAD SOIC EIAJ PACKAGE
CASE 966–01
MC74VHC595
MOTOROLA VHC Data – Advanced CMOS Logic
DL203 — Rev 1
2
FUNCTION TABLE
Inputs Resulting Function
Operation
Reset
(SCLR
)
Serial
Input
(SI)
Shift
Clock
(SCK)
Reg
Clock
(RCK)
Output
Enable
(OE
)
Shift
Register
Contents
Storage
Register
Contents
Serial
Output
(SQH)
Parallel
Outputs
(QA – QH)
Clear shift register L X X L, H, ↓ L L U L U
Shift data into shift register H D ↑ L, H, ↓ L D→SRA;
SRN→SR
N+1
U SRG→SR
H
U
Registers remains
unchanged
H X L, H, ↓ X L U ** U **
Transfer shift register
contents to storage register
H X L, H, ↓ ↑ L U SRN³
STR
N
* SR
N
Storage register remains
unachanged
X X X L, H, ↓ L * U * U
Enable parallel outputs X X X X L * ** * Enabled
Force outputs into high
impedance state
X X X X H * ** * Z
SR = shift register contents D = data (L, H) logic level ↓ = High–to–Low * = depends on Reset and Shift Clock inputs
STR = storage register contents U = remains unchanged ↑ = Low–to–High ** = depends on Register Clock input
DC Output Current, per Pin
DC Supply Current, VCC and GND Pins
Power Dissipation in Still Air, SOIC Packages†
TSSOP Package†
_
C
* Absolute maximum continuous ratings are those values beyond which damage to the device
may occur. Exposure to these conditions or conditions beyond those indicated may adversely
affect device reliability . Functional operation under absolute–maximum–rated conditions is not
implied.
†Derating — SOIC Packages: – 7 mW/_C from 65_ to 125_C
TSSOP Package: – 6.1 mW/_C from 65_ to 125_C
RECOMMENDED OPERATING CONDITIONS
Operating Temperature, All Package Types
Input Rise and Fall Time VCC = 3.3V ±0.3V
VCC =5.0V ±0.5V00
This device contains protection
circuitry to guard against damage
due to high static voltages or electric
fields. However, precautions must
be taken to avoid applications of any
voltage higher than maximum rated
voltages to this high–impedance circuit. For proper operation, Vin and
V
out
should be constrained to the
range GND v (Vin or V
out
) v VCC.
Unused inputs must always be
tied to an appropriate logic voltage
level (e.g., either GND or VCC).
Unused outputs must be left open.
MC74VHC595
VHC Data – Advanced CMOS Logic
DL203 — Rev 1
3 MOTOROLA
DC ELECTRICAL CHARACTERISTICS
Minimum High–Level
Input Voltage
Maximum Low–Level
Input Voltage
Minimum High–Level
Output Voltage
Vin = VIH or V
IL
IOH = – 50µA
Vin = VIH or V
IL
IOH = – 4mA
IOH = – 8mA
Maximum Low–Level
Output Voltage
Vin = VIH or V
IL
IOL = 50µA
Vin = VIH or V
IL
IOL = 4mA
IOL = 8mA
Three–State Output
Off–State Current
Vin = VIH or V
IL
V
out
= VCC or GND
Maximum Input
Leakage Current
Maximum Quiescent
Supply Current
AC ELECTRICAL CHARACTERISTICS (Input t
r
= tf = 3.0 ns)
Maximum Clock Frequency
(50% Duty Cycle)
VCC = 3.3 ± 0.3V CL = 15pF
RL = 1kΩ CL = 50pF
VCC = 5.0 ± 0.5V CL = 15pF
RL = 1kΩ CL = 50pF
Propagation Delay,
SCK to SQH
VCC = 3.3 ± 0.3V CL = 15pF
CL = 50pF
VCC = 5.0 ± 0.5V CL = 15pF
CL = 50pF
Propagation Delay,
SCLR
to SQH
VCC = 3.3 ± 0.3V CL = 15pF
CL = 50pF
VCC = 5.0 ± 0.5V CL = 15pF
CL = 50pF
Propagation Delay,
RCK to QA – QH
VCC = 3.3 ± 0.3V CL = 15pF
CL = 50pF
VCC = 5.0 ± 0.5V CL = 15pF
CL = 50pF
Output Enable Time,
OE
to QA – QH
VCC = 3.3 ± 0.3V CL = 15pF
RL = 1kΩ CL = 50pF
VCC = 5.0 ± 0.5V CL = 15pF
RL = 1kΩ CL = 50pF