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IDT72V8985 Datasheet(PDF) 13 Page - Integrated Device Technology

Part No. IDT72V8985
Description  3.3 VOLT TIME SLOT INTERCHANGE DIGITAL SWITCH 256 x 256
Download  14 Pages
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Manufacturer  IDT [Integrated Device Technology]
Direct Link  http://www.idt.com
Logo IDT - Integrated Device Technology

IDT72V8985 Datasheet(HTML) 13 Page - Integrated Device Technology

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13
Commercial Temperature Range
IDT72V8985 3.3V Time Slot Interchange
Digital Switch 256 x 256
Figure 12. Motorola Non-Multiplexed Bus Timing
CS
DS
D0-D7
WRITE
5707 drw15
R/
W
A0-A5
D0-D7
READ
DTA
VALID DATA
VALID DATA
tCSS
tRWS
tADS
tCSH
tRWH
tADH
tDHR
tDSW
tSWD
tDDR
tAKD
tDHW
tAKH
AC ELECTRICAL CHARACTERISTICS(1)
 MICROPROCESSOR TIMING
Symbol
Characteristics
Min.
Typ.(2)
Max.
Unit
Test Conditions
tCSS
CS Setup from DS Rising
0

ns
tRWS
R/
W Setup from DS Rising
5

ns
tADS
Add Setup from DS Rising
5

ns
tCSH
CS Hold after DS Falling
0

ns
tRWH
R/
W Hold after DS Falling
5

ns
tADH
Add Hold after DS Falling
5

ns
tDDR
Data Setup from
DTA Low on Read
10

ns
C
L = 150pF
tDHR
Data Hold on Read
10
50
90
ns
R
L = 1KΩ
(3), C
L = 150pF
tDSW
Data Setup on Write (Fast Write)
10

ns
tSWD
Valid Data Delay on Write (Slow Write)

122
ns
tDHW
Data Hold on Write
5

ns
tAKD
Acknowledgment Delay:
C
L = 150pF
Reading Data Memory
560
1220
ns
Reading/Writing Connection Memory
300/370
730/800
ns
Writing to Control Register
45
70
ns
Reading to Control Register
45
70
ns
tAKH
Acknowledgment Hold Time
10
20
40
ns
R
L = 1KΩ
(3), C
L = 150pF
NOTE:
1. Timing is over recommended temperature and power supply voltages.
2. Typical figures are at 25
°C and are for design aid only; not guaranteed and not subject to production testing.
3. High Impedance is measured by pulling to the appropriate rail with R
L, with timing corrected to cancel time taken to discharge CL.


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