MT90820AL Zarlink, MT90820AL Datasheet - Page 31

• Manufacturer Part Number: MT90820AL
• Description: Switch Fabric 2K x 2K/1K x 1K/512 x 512 131.072Mbps 5V 100-Pin MQFP Tray
• Manufacturer: Zarlink

Specifications of MT90820AL

• Package: 100MQFP
• Number Of Ports: 16
• Fabric Size: 2K x 2K|1K x 1K|512 x 512
• Switching Bandwidth: 131.072 Mbps
• Switch Core: Non-Blocking
• Port Speed: 2.048|4.096|8.192 Mbps
• Operating Supply Voltage: 5 V

AC Electrical Characteristics - Multiplexed Bus Timing (Mode 1)
Note 1:
10 WR pulse width (fast write)
11 WR delay after ALE falling
12 CS setup from WR
13 Data setup from WR (fast write)
14 Valid Data Delay on write (slow write)
15 Data hold after WR inactive
16 Acknowledgment Delay:
17 Acknowledgment Hold Time
1
2
3
4
5
6
7
8
9
ALE pulse width
Address setup from ALE falling
Address hold from ALE falling
RD active after ALE falling
Data setup from DTA Low on Read
CS hold after RD/WR
RD pulse width (fast read)
CS setup from RD
Data hold after RD
Reading/Writing Registers
Reading/Writing Memory, @ 2Mb/s
High Impedance is measured by pulling to the appropriate rail with R
C
L
.
Characteristics
@ 8Mb/s
@ 4Mb/s
ODE
STo
Figure 14 - Output Driver Enable (ODE)
HiZ
t
t
t
Sym.
t
Zarlink Semiconductor Inc.
t
t
ALWR
t
t
t
t
t
ALRD
t
CSRW
t
t
t
t
DHW
ALW
ADH
DDR
t
DHR
CSW
DSW
SWD
AKD
AKH
ADS
CSR
WW
RW
t
ODE
MT90820
Valid Data
31
Min.
20
10
10
10
10
10
10
90
10
0
0
0
t
ODE
Typ.
80
90
45
L
HiZ
, with timing corrected to cancel time taken to discharge
760/780
400/420
220/240
V
55/60
Max.
V
122
TT
TT
75
80
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
C
C
Note 1.
C
C
C
C
C
Note 1.
L
L
L
L
L
L
L
=150pF
=150pF, R
=150pF
=150pF
=150pF
=150pF
=150pF, R
Test Conditions
Data Sheet
L
L
=1K,
=1K,