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SN65555 Datasheet(PDF) 3 Page - Texas Instruments

Part No. SN65555
Description  ELECTROLUMINESCENT COLUMIN DRIVERS
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
Logo TI - Texas Instruments

SN65555 Datasheet(HTML) 3 Page - Texas Instruments

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SLDS031A
– APRIL 1985 – REVISED APRIL 1993
4
–3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
logic diagram (positive logic)
LATCH
ENABLE
ENABLE
OUTPUT
Buffers
Output
VCC2
R1
R2
R31
R32
Register
Shift
Latches
1D
LC32
LC31
LC2
LC1
2D
C2
2D
C2
C2
2D
2D
Q1
Q2
Q31
Q32
C2
CLOCK
DATA IN
SERIAL OUT
C1
C1
1D
C1
1D
1D
C1
28 Stages
(Q3 thru Q30)
Not Shown
FUNCTION TABLE
CONTROL INPUTS
SHIFT REGISTER
LATCHES
OUTPUTS
FUNCTION
CLOCK
LATCH
OUTPUT
SHIFT REGISTER
R1 THRU R32
LATCHES
LC1 THRU LC32
SERIAL
Q1 THRU Q32
CLOCK
ENABLE
ENABLE
R1 THRU R32
LC1 THRU LC32
SERIAL
Q1 THRU Q32
Load
No
X
X
X
X
Load and shift†
No change
Determined by
LATCH ENABLE‡
R32
R32
Determined by OUTPUT ENABLE
Latch
X
X
L
H
X
X
As determined above
Stored data
New data
R32
Determined by OUTPUT ENABLE
Output
Enable
X
X
X
X
L
H
As determined above
Determined by
LATCH ENABLE‡
R32
R32
All L
LC1 thru LC21, respectively
H = high level,
L = low level,
X = irrelevant,
= low-to-high-level transition.
† R32 and the serial output take on the state of R31, R31 takes on the state of R30,. . .R2 takes on the state of R1, and R1 takes on the state of
the data input.
‡ New data enter the latches while LATCH ENABLE is high. These data are stored while LATCH ENABLE is low.


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