PI404MC-A8 American Microsystems, Inc., PI404MC-A8 Datasheet - Page 6

• Manufacturer Part Number: PI404MC-A8
• Description: 400dpi CIS Module
• Manufacturer: American Microsystems, Inc.

Switching Characteristics (25°C)
The Switching Characteristics (25°C) for the I/O clocks are shown in the diagram below. For the
timing symbol definitions see the following table below the timing diagram.
Note:
Item
Clock cycle time
Clock pulse width
Clock duty cycle
Prohibit crossing time of
Start Pulse
Data setup time
Data hold time
Signal delay time
Signal settling time
(1) "Prohibit crossing of start pulse" is to indicate that the start pulse should not be active
high between any two consecutive high going clock pulse or two consecutive low going
clock pulses. See the timing diagram. Only one high going clock under the active high
start pulse initiates the internal shift register, and it must not be active over two high
going clocks. All low going clock pulses will not initiate the shift register, but to ensure
that the start pulse will not be actively high during two consecutive high going clocks, the
circuit should be design to keep the start pulse active only for one low going clock cycle.
CP
SP
Vout
(1)
tds
Table 6. Timing Symbol’s Definition and Timing Values.
tprh
to
tdh
MODULE TIMING DIAGRAM
Symbol
to
tw
tprh
tds
tdh
tdl
tsh
PAGE 6 OF 7 - PI404MC-A8, 01-19-01
FIGURE 3
tsh
1.0
250
25
0
20
0
20
100
tdl
Min.
tw
Typical
4.0
75
Max.
ns
%
ns
ns
ns
ns
ns
s
Units