ucq5812 Allegro MicroSystems, Inc., ucq5812 Datasheet - Page 4

• Manufacturer Part Number: ucq5812
• Description: Bimos Ii 20-bit Serial-input, Latched Source Drivers For -40? To +85? Operation
• Manufacturer: Allegro MicroSystems, Inc.

A. Minimum Data Active Time Before Clock Pulse
B. Minimum Data Active Time After Clock Pulse
C. Minimum Data Pulse Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 ns
D. Minimum Clock Pulse Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 ns
E. Minimum Time Between Clock Activation and Strobe . . . . . . . . . . . 300 ns
F. Minimum Strobe Pulse Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 ns
G. Typical Time Between Strobe Activation and
Timing is representative of a 3.3 MHz clock. Higher speeds may be attainable
with increased supply voltage; operation at high temperatures will reduce the
specified maximum clock frequency.
Serial
L = Low Logic Level
Input
Data
5812-F
20-BIT SERIAL-INPUT,
LATCHED SOURCE DRIVERS
FOR -40 C TO +85 C OPERATION
H
X
L
BLANKING
(Data Set-Up Time) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 ns
(Data Hold Time) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 ns
Output Transistion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 ns
STROBE
DATA IN
CLOCK
Clock
Input
OUT
N
Shift Register Contents
I
H
L
R
X
P
1
1
1
H = High Logic Level
A
I
R
R
R
X
P
2
C
2
1
1
2
B
I
R
R
R
X
P
3
3
2
2
3
D
E
… I
… R
… R
… R
… X
… P
N-1
N-1
N-2
N-2
N-1
F
G
I
R
R
R
X
P
N
N-1
N-1
N
N
X = Irrelevant
Output
Serial
Data
R
R
R
P
X
N-1
N-1
N
N
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
Strobe
Input
H
L
P = Present State R = Previous State
Dwg. No. 12,649A
I
R
P
X
1
1
1
Latch Contents
I
R
P
X
2
2
2
I
R
P
X
3
3
3
… I
… R
… P
… X
N-1
N-1
N-1
I
X
R
P
N
N
N
Blanking
H
L
I
P
L
1
1
Output Contents
I
P
L
2
2
I
P
L
3
3
… I
… P
… L
N-1
N1
I
P
L
N
N