74HCT594
8-BIT SHIFT REGISTER WITH 8-BIT OUTPUT REGISTER
Description
The 74HCT594 is a high speed CMOS device that is designed to be
pin compatable with 74LS low power Schottky types.
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 shift register reset function (SHR) sets all shift
register values to zero and is independent of all clocks. Also when
asserted low the storage register reset function (STR) sets all shift
register values to zero and is independent of all clocks
Data from the input serial shift register is placed in the output
register 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.
All registers capture data on rising edge and change output on the
falling edge. If both clocks are connected together, the input shift
register is always one clock cycle ahead of the output register.
Pin Assignments
Features
•
•
•
•
•
•
Wide Supply Voltage Range from 4.5V to 5.5V
Sinks or sources 8mA at V
CC
= 4.5V
CMOS low power consumption
Schmitt Trigger Action at All Inputs
Inputs accept up to 6.0V
ESD Protection Tested per JESD 22
Exceeds 200-V Machine Model (A115-A)
Exceeds 2000-V Human Body Model (A114-A)
Exceeds 1000-V Charged Device Model (C101C)
•
•
•
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)
Applications
•
•
•
•
General Purpose Logic
Serial to Parallel Data conversion
Capture and hold data for extended periods of time.
Allow simple serial bit streams from a microcontroller to
control as many peripheral lines as needed.
•
Wide array of products such as:
o
o
o
Computer peripherals
Appliances
Industrial control
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 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 <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl)
and < 1000 ppm antimony compounds.
Click for Ordering Information
74HCT594
Document number: DS35491 Rev. 2 - 2
1 of 12
www.diodes.com
June 2013
© Diodes Incorporated
74HCT594
Absolute Maximum Ratings
(Note 4) (@T
A
= +25°C, unless otherwise specified.
Symbol
ESD HBM
ESD CDM
ESD MM
V
CC
V
I
V
o
I
IK
I
IK
I
OK
I
OK
I
O
I
CC
I
GND
T
J
T
STG
P
TOT
Notes:
Description
Human Body Model ESD Protection
Charged Device Model ESD Protection
Machine Model ESD Protection
Supply Voltage Range
Input Voltage Range
Voltage applied to output in high or low state
Input Clamp Current
Input Clamp Current
Output Clamp Current
Output Clamp Current
V
I
< -0.5V
VI > V
cc
+0.5V
V
O
<-0.5V
V
O
> V
CC
+ 0.5V
Q7 standard output
Qn bus driver outputs
Rating
2
1
200
-0.5 to 7.0
-0.5 to 7.0
-0.3 to V
CC
+0.5
-20
20
-20
20
+/- 25
+/- 35
70
-70
-40 to +150
-65 to +150
500
Unit
KV
KV
V
V
V
V
mA
mA
mA
mA
mA
mA
mA
mA
°C
°C
mW
Continuous output current
Continuous current through V
cc
Continuous current through GND
Operating Junction Temperature
Storage Temperature
Total Power Dissipation
4. Stresses beyond the absolute maximum may result in immediate failure or reduced reliability. These are stress values and device
operation should be within recommend values.
Recommended Operating Conditions
(Note 5) (@T
A
= +25°C, unless otherwise specified.)
Symbol
V
CC
V
I
V
O
t/V
T
A
Notes:
Parameter
Supply Voltage
Input Voltage
Output Voltage
Input transition rise or fall rate
Operating free-air temperature
Conditions
Min
4.5
0
0
Max
5.5
5.5
V
CC
500
+125
Unit
V
V
V
ns/V
°C
Active Mode
V
CC
= 4.5V to 5.5V
-40
5. Unused inputs should be held at V
CC
or Ground.
74HCT594
Document number: DS35491 Rev. 2 - 2
4 of 12
www.diodes.com
June 2013
© Diodes Incorporated
74HCT594
Electrical Characteristics
(@T
A
= +25°C, unless otherwise specified.)
V
CC
4.5 V to 5.5 V
4.5 V to 5.5 V
4.5 V
4.5 V
4.5 V
T
A
= +25°C
Min
2.0
Typ
1.6
Max
-40°C to +85°C
Min
2.0
Max
-40°C to +125°C
Unit
Min
2.0
Max
Symbol
V
IH
V
IL
Parameter
High-level
Input Voltage
Test Conditions
0.8
0.8
0.8
V
V
Low-level input
voltage
I
OH
= -20μA
High Level
Output Voltage All outputs
4.4
3.98
3.98
4.5
4.32
4.32
4.4
3.85
3.85
4.4
3.7
3.7
0.1
0.26
0.26
±0.1
8.0
0.1
0.33
0.33
±1
80
0.1
0.4
0.4
±1
160
V
V
OH
Q7S output
Qn Bus
Outputs
I
OH
= -4.0mA
I
OH
= -6.0 mA
I
OL
= 20μA
Low-level
Output Voltage All outputs
V
OL
Q7S output
Qn Bus
Outputs
I
I
I
CC
Input Current
Supply Current
I
OL
= 4.0mA
I
OL
= 6.0mA
V
I
=GND to
5.5 V
V
I
= GND or
I
O
=0
V
CC
Test Per
Pin
V
I
= V
cc
I
CC
Additional
Supply Current Other
-2.1 V
V
I
= Vcc
or GND
I
O
=0
C
i
Input
Capacitance
V
i
= V
CC
or GND
PINS
SHCP
SHST
SHR
STR
PIN
DS
5.5 V
4.5 V
4.5 V
4.5 V
0
0.15
0.16
V
μA
μA
5.5 V
5.5 V
4.5V to 5.5 V
100
240
300
300
μA
4.5V to 5.5 V
3.5
75
120
150
150
10
10
10
pF
Operating Characteristics
Parameter
Test
Conditions
f = 1 MHz all outputs switching-no load
V
I
= GND TO V
CC
– 1.5V
V
CC
= 5V
TYP
51
Unit
C
pd
Power dissipation
capacitance
pF
74HCT594
Document number: DS35491 Rev. 2 - 2
5 of 12
www.diodes.com
June 2013
© Diodes Incorporated
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