MT8985AL Zarlink, MT8985AL Datasheet - Page 19

• Manufacturer Part Number: MT8985AL
• Description: Switch Fabric 256 x 256 16.384Mbps 5V 44-Pin MQFP Tray
• Manufacturer: Zarlink

Specifications of MT8985AL

• Package: 44MQFP
• Number Of Ports: 8
• Fabric Size: 256 x 256
• Switching Bandwidth: 16.384 Mbps
• Switch Core: Non-Blocking
• Port Speed: 2.048 Mbps
• Operating Supply Voltage: 5 V

AC Electrical Characteristics
† Timing is over recommended temperature & power supply voltages.
‡ Typical figures are at 25
* High Impedance is measured by pulling to the appropriate rail with R
C4i
STi
F0i
STo
1
2
3
4
C4i
F0i
STi/
STo
2.0V
0.8V
2.0V
0.8V
2.0V
0.8V
2.0V
0.8V
O
U
U
T
P
T
S
STo0/7 Delay - Active to High Z
STo0/7 Delay - High Z to Active
Output Driver Enable Delay
CSTo Output Delay
t
r
Characteristics
Detail a
°
C and are for design aid only: not guaranteed and not subject to production testing.
t
f
†
See Detail a
- Serial Streams for ST-BUS and GCI Backplanes
t
DAA
t
F0iS
bit 0
Sym.
t
t
t
t
Zarlink Semiconductor Inc.
XCD
SAZ
SZA
OED
Figure 14 - GCI Timing
t
t
t
F0iH
CL
WFH
MT8985
Min.
0
19
L
, with timing corrected to cancel time taken to discharge C
t
bit 1
CH
t
Note: bit 0 identifies the first bit of the GCI frame
Typ.
STiS
‡
t
STiH
Max.
100
100
65
60
bit 2
Units
ns
ns
ns
ns
t
C4i
R
C
R
C
L
L
L
L
=1 KΩ*, C
=150 pF
=1 KΩ*, C
=150 pF
Test Conditions
bit 3
Data Sheet
L
L
=150 pF
=150 pF
L
.