MT8986 Mitel Semiconductor, MT8986 Datasheet - Page 32

• Manufacturer Part Number: MT8986
• Description: CMOS ST-BUS FAMILY Multiple Rate Digital Switch
• Manufacturer: Mitel Semiconductor

MT8986
AC Electrical Characteristics
Voltages are with respect to ground (VSS) unless otherwise stated.
† Timing is over recommended temperature & power supply voltages.
‡ Typical figures are at 25°C and are for design aid only: not guaranteed and not subject to production testing.
* High Impedance is measured by pulling to the appropriate rail with R
2-94
10 WR pulse width (fast write)
12 CS setup from WR
13 Data setup from WR (fast write)
14 Valid Data Delay on write
15 Data hold after WR inactive
16 Acknowledgement Delay:
17 Acknowledgement Hold Time
11 WR delay after ALE falling
1 ALE pulse width
2 Address setup from ALE falling
3 Address hold from ALE falling
4 RD active after ALE falling
5 Data setup from DTA Low on Read
6 CS hold after RD/WR
7 RD pulse width (fast read)
8 CS setup from RD
9 Data hold after RD
(slow write)
Reading from Control & Mode Reg.
Reading/Writing Conn. Memories
Writing to Control & Mode Reg.
Characteristics
Reading Data Memory
†
- Intel/National- HPC Multiplexed Bus Mode
t
Sym
t
t
t
t
t
t
t
CSRW
t
t
t
t
t
t
t
ALRD
t
ALWR
t
CSW
DSW
SWD
DHW
ALW
ADS
ADH
DDR
CSR
DHR
AKD
AKH
WW
RW
Min
20
10
10
10
90
10
L
8
9
9
0
0
0
8
, with timing corrected to cancel time taken to discharge C
300/370
Typ
560
80
50
90
47
60
60
‡
730/800
1220
Max
122
125
110
90
95
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
C
C
C
C
L
L
L
L
Test Conditions
=150 pF
=150 pF,R
=150 pF
=150 pF,R
L
L
L
.
=1 K
=1 K *