ucq5818af Allegro MicroSystems, Inc., ucq5818af Datasheet - Page 4

• Manufacturer Part Number: ucq5818af
• Description: Bimos Ii 32-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
Data
Input Input I
H
L
X
L = Low Logic Level
5818-F
32-BIT SERIAL-INPUT,
LATCHED SOURCE DRIVERS
FOR -40 C TO +85 C OPERATION
BLANKING
STROBE
DATA IN
CLOCK
(Data Set-Up Time) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 ns
(Data Hold Time) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 ns
Output Transistion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 ns
Clock
OUT
N
H
L
R
X
P
1
1
1
Shift Register Contents
I
R
R
R
X
P
2
2
1
1
2
H = High Logic Level
A
C
I
R
R
R
X
P
3
B
3
2
2
3
...
...
...
...
...
...
D
E
I
R
R
R
X
P
N-1
N-1
N-2
N-2
N-1
F
I
R
R
R
X
P
N
G
N
N-1
N-1
N
X = Irrelevant
Output
Serial
Data
R
R
R
X
P
N
N-1
N-1
N
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
Strobe
Input
P = Present State
H
L
Dwg. No. A-12,649A
I
R
P
X
1
1
1
Latch Contents
I
R
P
X
2
2
2
I
R
P
X
3
R = Previous State
3
3
...
...
...
...
I
R
P
X
N-1
N-1
N-1
R
P
I
X
N
N
N
Blanking
H
L
I
P
L
1
1
I
P
L
Output Contents
2
2
I
P
L
3
3
... I
... P
... L
N-1
N-1
I
P
L
N
N