MAX458 Datasheet, PDF (12/16 Pages) Maxim Integrated Products – 8x4 Video Crosspoint Switches with Buffers

8x4 Video Crosspoint Switches with Buffers
CS
SCLK
DIN
tCS0
tCSS
t_CH
tDS
tDH
D0
D3 (OUT3)
DOUT
D3
DATA FROM PREVIOUS WRITE CYCLE
Figure 6. Serial-Mode Timing
•••
tCL
•••
•••
tD0
D2 (OUT3)
D1 (OUT0)
•••
D2
D1
tCSH
D0 (OUT0)
D0
tCSW
tCS1
D3
CS
SCLK
DIN
DOUT
D3
D2
D1
D0
D3
D2
D1
D0
D3
D2
D1
D0
D3
D2
D1
D0
OUT3
OUT2
OUT1
OUT0
D3
D2
D1
D0
D3
D2
D1
D0
D3
D2
D1
D0
D3
D2
D1
D0 D3
DATA FROM PREVIOUS WRITE CYCLE
Figure 7. Serial-Mode Data Sequence
1
SERIAL
DIN
DATA IN
CS
SCLK
UPDATE
WR
MAX458
CE
MAX459
A0
40 _{CHIP SELECT}
39 SERIAL
CLOCK
38
V_CC
37
VCC
36
VCC
26
19
20
SERIAL
DATA OUT
SHDN
DOUT
A1 ²⁵
D0 ²⁴
D1 ²³
D2 ²²
D3 ²¹
Pin numbers apply to DIP package.
Figure 8. Serial Connection (only logic pins shown)
SCLK
MAX458 ^DIN
MAX459
CS
DOUT
SK
MICROWIRE
SO PORT
I/O
SI
THE DOUT-SI CONNECTION IS NOT REQUIRED FOR
WRITING TO THE MAX458/MAX459, BUT MAY BE USED
FOR DATA-ECHO PURPOSES.
Figure 9. Microwire Connection
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