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74LV595 Datasheet PDF : 20 Pages
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NXP Semiconductors
74LV595
8-bit serial-in/serial-out or parallel-out shift register; 3-state
7. Functional description
Table 3. Function table[1]
Input
SHCP STCP OE MR DS
X
X
L
L
X
X
↑
L
L
X
X
X
H
L
X
↑
X
L
H
H
X
↑
L
H
X
↑
↑
L
H
X
Output
Q7S Qn
L
NC
L
L
L
Z
Q6S NC
NC QnS
Q6S QnS
Function
a LOW-state on MR only affects the shift register
empty shift register loaded into storage register
shift register clear; parallel outputs in high-impedance OFF-state
logic HIGH-state shifted into shift register stage 0. Contents of all
shift register stages shifted through, e.g. previous state of stage 6
(internal Q6S) appears on the serial output (Q7S).
contents of shift register stages (internal QnS) are transferred to
the storage register and parallel output stages
contents of shift register shifted through; previous contents of the
shift register is transferred to the storage register and the parallel
output stages
[1] H = HIGH voltage state; L = LOW voltage state; ↑ = LOW-to-HIGH transition; X = don’t care; NC = no change;
Z = high-impedance OFF-state.
8. Limiting values
Table 4. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
Symbol
Parameter
Conditions
Min
Max Unit
VCC
supply voltage
IIK
input clamping current
VI < −0.5 V or VI > +0.5 V
IOK
output clamping current
VI < −0.5 V or VI > +0.5 V
IO
output current
−0.5 V < VO < VCC + 0.5 V
standard driver outputs
−0.5 +4.6 V
-
±20
mA
-
±50
mA
-
25
mA
bus driver outputs
35
mA
ICC
supply current
standard driver outputs
bus driver outputs
50
mA
70
mA
IGND
ground current
standard driver outputs
bus driver outputs
−50
mA
−70
mA
Tstg
storage temperature
Ptot
total power dissipation
Tamb = −40 °C to +125 °C
DIP16
−65
[2]
-
+150 °C
750
mW
SO16, SSOP16, TSSOP16
-
500
mW
[1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
[2] For DIP16 packages: above 70 °C the value of Ptot derates linearly with 12 mW/K.
For SO16 packages: above 70 °C the value of Ptot derates linearly with 8 mW/K.
For (T)SSOP16 packages: above 60 °C the value of Ptot derates linearly with 5.5 mW/K.
74LV595_3
Product data sheet
Rev. 03 — 21 April 2009
© NXP B.V. 2009. All rights reserved.
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