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Электронный компонент: 74VHC594TTR

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1/11
July 2001
s
HIGH SPEED: t
PD
= 4.2ns (TYP.) at V
CC
= 5V
s
LOW POWER DISSIPATION:
I
CC
= 4
A (MAX.) at T
A
=25
C
s
HIGH NOISE IMMUNITY:
V
NIH
= V
NIL
= 28% V
CC
(MIN.)
s
POWER DOWN PROTECTION ON INPUTS
s
SYMMETRICAL OUTPUT IMPEDANCE:
|I
OH
| = I
OL
= 8 mA (MIN)
s
BALANCED PROPAGATION DELAYS:
t
PLH
t
PHL
s
OPERATING VOLTAGE RANGE:
V
CC
(OPR) = 2V to 5.5V
s
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 594
s
IMPROVED LATCH-UP IMMUNITY
s
LOW NOISE: V
OLP
= 0.8V (MAX.)
DESCRIPTION
The 74VHC594 is an high speed CMOS 8-BIT
SHIFT REGISTERS fabricated with sub-micron
silicon gate C
2
MOS technology.
This device contains an 8-bit serial-in, parallel-out
shift register that feeds an 8-bit D-type storage
register. Separate clocks and direct overriding
clear (SCLR, RCLR) are provided for both the shift
register and the storage register.
A serial (QH') output is provided for cascading
purposes.
Both the shift register and storage
register use positive-edge triggered clocks. If the
clocks are connected together, the shift register
state will always be one clock pulse ahead of the
storage register.
Power down protection is provided on all inputs
and 0 to 7V can be accepted on inputs with no
regard to the supply voltage. This device can be
used to interface 5V to 3V.
All inputs are equipped with protection circuits
against static discharge, giving them 2KV ESD
immunity and transient excess voltage.
74VHC594
8 BIT SHIFT REGISTER
WITH OUTPUT REGISTER
PIN CONNECTION AND IEC LOGIC SYMBOLS
ORDER CODES
PACKAGE
TUBE
T & R
SOP
M74VHC594M1R
M74VHC594RM13TR
TSSOP
M74VHC594TTR
TSSOP
SOP
74VHC594
2/11
INPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
TRUTH TABLE
X: Don't Care
PIN No
SYMBOL
NAME AND FUNCTION
1, 2, 3, 4, 5,
6, 7, 15
QA to QH
Data Outputs
9
QH'
Serial Data Output
10
SCLR
Shift Register Clear Input
11
SCK
Shift Register Clock Input
13
RCLR
Storage Register Clear
Input
14
SI
Serial Data Input
12
RCK
Storage Register Clock
Input
8
GND
Ground (0V)
16
V
CC
Positive Supply Voltage
INPUTS
OUTPUTS
SI
SCK
SCLR
RCK
RCLR
X
X
L
X
X
SHIFT REGISTER IS CLEAR
L
H
X
X
FIRST STAGE OF SHIFT REGISTE R GOES LOW
OTHER STAGES STORE THE DATA OF PREVI-
OUS STAGE, RESPECTIVELY
H
H
X
X
FIRST STAGE OF SHIFT REGISTER GOES HIGH
OTHER STAGES STORE THE DATA OF PREVI-
OUS STAGE, RESPECTIVELY
L
H
X
X
SHIFT REGISTER STATE IS NOT CHANGED
X
X
X
X
L
STORAGE REGISTER IS CLEARED
X
X
X
H
SHIFT REGIST ER DATA IS STORED IN THE
STORAGE REGIST ER
X
X
X
H
STORAGE REGIST ER STATE IS NOT CHANGED
74VHC594
3/11
LOGIC DIAGRAM
This logic diagram has not be used to estimate propagation delays
74VHC594
4/11
TIMING CHART
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
Symbol
Parameter
Value
Unit
V
CC
Supply Voltage
-0.5 to +7.0
V
V
I
DC Input Voltage
-0.5 to +7.0
V
V
O
DC Output Voltage
-0.5 to V
CC
+ 0.5
V
I
IK
DC Input Diode Current
- 20
mA
I
OK
DC Output Diode Current
20
mA
I
O
DC Output Current
25
mA
I
CC
or I
GND
DC V
CC
or Ground Current
50
mA
T
stg
Storage Temperature
-65 to +150
C
T
L
Lead Temperature (10 sec)
300
C
74VHC594
5/11
RECOMMENDED OPERATING CONDITIONS
1) V
IN
from 30% to 70% of V
CC
DC SPECIFICATIONS
Symbol
Parameter
Value
Unit
V
CC
Supply Voltage
2 to 5.5
V
V
I
Input Voltage
0 to 5.5
V
V
O
Output Voltage
0 to V
CC
V
T
op
Operating Temperature
-55 to 125
C
dt/dv
Input Rise and Fall Time (note 1) (V
CC
= 3.3
0.3V)
(V
CC
= 5.0
0.5V)
0 to 100
0 to 20
ns/V
Symbol
Parameter
Test Condition
Value
Unit
V
CC
(V)
T
A
= 25
C
-40 to 85
C
-55 to 125
C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
V
IH
High Level Input
Voltage
2.0
1.5
1.5
1.5
V
3.0 to
5.5
0.7V
CC
0.7V
CC
0.7V
CC
V
IL
Low Level Input
Voltage
2.0
0.5
0.5
0.5
V
3.0 to
5.5
0.3V
CC
0.3V
CC
0.3V
CC
V
OH
High Level Output
Voltage
2.0
I
O
=-50
A
1.9
2.0
1.9
1.9
V
3.0
I
O
=-50
A
2.9
3.0
2.9
2.9
4.5
I
O
=-50
A
4.4
4.5
4.4
4.4
3.0
I
O
=-4 mA
2.58
2.48
2.4
4.5
I
O
=-8 mA
3.94
3.8
3.7
V
OL
Low Level Output
Voltage
2.0
I
O
=50
A
0.0
0.1
0.1
0.1
V
3.0
I
O
=50
A
0.0
0.1
0.1
0.1
4.5
I
O
=50
A
0.0
0.1
0.1
0.1
3.0
I
O
=4 mA
0.36
0.44
0.55
4.5
I
O
=8 mA
0.36
0.44
0.55
I
I
Input Leakage
Current
0 to
5.5
V
I
= 5.5V or GND
0.1
1
1
A
I
CC
Quiescent Supply
Current
5.5
V
I
= V
CC
or GND
4
40
40
A