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參數資料
| 型號： | MT89L80 |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | Digital Switch(數字開關) |
| 中文描述： | 數字開關（數字開關） |
| 文件頁數： | 2/15頁 |
| 文件大小： | 75K |
| 代理商： | MT89L80 |
MT89L80
Advance Information
2-4
Figure 2 - Pin Connections
Pin Description
Pin #
Name
Description
44
PLCC
48
SSOP
2
2
DTA
Data Acknowledgment
(5V Tolerant Three-state Output)
.
This active low output
indicates that a data bus transfer is complete. A pull-up resistor is required at this
output.
3-5
3-5
STi0-2
ST-BUS Inputs 0 to 2
(5V-tolerant Inputs). Serial data input streams. These streams
have data rates of 2.048Mbit/s with 32 channels.
7-11
7-11
STi3-7
ST-BUS Inputs 3 to 7
(5V-tolerant Inputs). Serial data input streams. These streams
may have data rates of 2.048Mbit/s with 32channels.
12
12,36
V
DD
RESET Device Reset
( 5v-tolerant input). This pin is only available for the 48-pin SSOP
package.This active low input puts the device in its reset state. It clears the internal
counters and registers. All ST-BUS outputs are set to the high impedance state. In
normal operation. The RESET pin must be held low for a minimum of 100nsec to reset
the device.
+3.3 Volt Power Supply
.
13
13
14
F0i
Frame Pulse
(5V-tolerant Input). This is the input for the frame synchronization
pulse for the 2048 kbit/s ST-BUS streams. A low on this input causes the internal
counter to reset on the next negative transition of C4i.
14
15
C4i
4.096 MHz Clock
(5V-tolerant Input). ST-BUS bit cell boundaries lie on the alternate
falling edges of this clock.
15-17
16-18
A0-2
Address 0-2 / Input Streams 8-10
(5V-tolerant Input). These are the inputs for the
address lines on the microprocessor interface.
1
6
5
4
3
2
4
4
4
4
4
39
38
37
36
35
34
33
32
31
30
29
7
8
9
10
11
12
13
14
15
16
17
2
1
1
2
2
2
2
2
2
2
2
STi3
STi4
STi5
STi6
STi7
V
F0i
C4i
A0
A1
A2
STo3
STo4
STo5
STo6
STo7
V
SS
D0
D1
D2
D3
D4
N
S
D
O
S
N
N
A
D
C
D
N
A
A
R
D
D
44 PIN PLCC
S
S
C
S
S
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
48 PIN SSOP
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
ODE
STo0
STo1
STo2
NC
STo3
STo4
STo5
STo6
STo7
V
SS
V
DD
D0
D1
D2
D3
D4
NC
D5
D6
D7
CS
V
SS
DTA
STi0
STi1
STi2
NC
STi3
STi4
STi5
STi6
STi7
V
DD
RESET
F0i
C4i
A0
A1
A2
NC
A3
A4
A5
DS
R/W
48
CSTo
V
SS
(JEDEC MO-118, 300mil Wide)
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