MT90823AG Zarlink Semiconductor, Inc., MT90823AG Datasheet - Page 29

• Manufacturer Part Number: MT90823AG
• Description: Switch Fabric, 131.072Mbps Switching Bandwidth, 3.3V Supply Voltage, 120-PBGA
• Manufacturer: Zarlink Semiconductor, Inc.

AC Electrical Characteristics - Multiplexed Bus Timing (Mode 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
Note:
1
2
3
4
5
6
7
8
9
1. High Impedance is measured by pulling to the appropriate rail with R
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
AD0-AD7
Reading/Writing Registers
Reading/Writing Memory @ 2Mb/s
D8-D15
ALE
DTA
WR
CS
RD
Characteristics
HiZ
t
t
ADS
ALW
Figure 16 - Multiplexed Bus Timing (Mode 1)
@ 4Mb/s
@ 8Mb/s
ADDRESS
t
ALWR
t
t
ADH
ALRD
t
t
CSR
CSW
t
t
t
t
Sym
CSRW
t
t
t
t
t
t
t
t
ALWR
t
ALRD
t
t
t
t
CSW
DSW
SWD
DHW
DDR
DHR
ALW
ADS
ADH
CSR
AKD
AKH
WW
RW
t
SWD
HiZ
Min
20
45
10
45
20
t
AKD
3
3
3
5
5
0
3
0
5
L
t
DDR
, with timing corrected to cancel time taken to discharge C
Typ
t
t
RW
WW
t
DSW
DATA
760/750
400/390
220/210
43/43
Max
122
20
22
CMOS
t
t
t
DHR
CSRW
DHW
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
t
AKH
C
C
Note 1.
C
C
C
C
C
Note 1.
Test Conditions
L
L
L
L
L
L
L
HiZ
=150pF
=150pF, R
=150pF
=150pF
=150pF
=150pF
=150pF, R
MT90823
L
L
L
V
V
V
V
V
=1K,
=1K,
V
.
CT
CT
CT
CT
CT
CT
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