IDT72V8985 Integrated Device Technology, IDT72V8985 Datasheet - Page 10

• Manufacturer Part Number: IDT72V8985
• Description: 3.3 Volt Time Slot Interchange Digital Switch 256 X 256
• Manufacturer: Integrated Device Technology

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.
AC ELECTRICAL CHARACTERISTICS  ST-BUS TIMING
IDT72V8985 3.3V Time Slot Interchange
Digital Switch 256 x 256
C4i
F0i
RX
TX
Symbol
t
t
t
t
t
t
F0iW
tr, tf
STiS
STiH
t
F0iS
F0iH
DAA
t
t
C4i
CH
CL
Parameter
Frame Pulse Width
Frame Pulse Setup Time
Frame Pulse Hold Time
TX delay Active to Active
RX Setup Time
RX Hold Time
Clock Period
CK Input Low
CK Input High
Clock Rise/Fall Time
Ch. 31, Bit 0
Ch. 31, Bit 0
t
F0iS
t
F0iW
t
F0iH
t
DAA
Min.






10
10
Figure 7. ST-BUS
5
5
t
STiS
Ch. 0, Bit 7
Ch. 0, Bit 7
10
Typ.
244
244
122
122



20
20
40
(2)
®
t
Timing
C4i
t
STiH
Max.
190
190






60
10
t
f
t
CH
Ch. 0, Bit 6
t
r
Units
Commercial Temperature Range
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
t
CL
Ch. 0, Bit 6
Test Conditions
C
L
= 150pF
Ch. 0, Bit 5
Ch. 0,
Bit 5
5707 drw10