參數(shù)資料
型號(hào)： MT8981DP
廠商： ZARLINK SEMICONDUCTOR INC
元件分類： 路由/交換
英文描述： Digital Switch
中文描述： TELECOM, DIGITAL TIME SWITCH, PQCC44
封裝： PLASTIC, MS-018AC, LCC-44
文件頁(yè)數(shù)： 3/17頁(yè)
文件大小： 561K
代理商： MT8981DP
ISO-CMOS
MT8981D
2-19
22-
24
25-
27
D7-D5
Data 7 to 5 (Three-state I/O Pins).
microprocessor interface.
These are the bidirectional data pins on the
25-
29
29-
33
D4-D0
Data 4 to 0 (Three-state I/O Pins).
microprocessor interface.
These are the bidirectional data pins on the
30
34
V
SS
Power Input.
Negative Supply (Ground).
31-
34
35-
38
IC
Internal Connections.
Leave pins disconnected.
35
39
STo3
ST-BUS Output 3 (Three-state Outputs).
BUS output streams.
These are the pins for the four 2048 kbit/s ST-
36-
38
41-
43
STo2-
STo0
ST-BUS Output 2 to 0 (Three-state Outputs).
kbit/s ST-BUS output streams.
These are the pins for the four 2048
39
44
ODE
Output Drive Enable (Input).
normally. If this input is low, the STo0-STo3 output drivers go into their high impedance state.
NB:
Even when ODE is high, channels on the STo0-STo3 outputs can go high impedance
under software control.
If this input is held high, the STo0-STo3 output drivers function
40
1
IC
Internal Connection.
Leave pin disconnected.
Pin Description (continued)
Pin #
Name
Description
40
DIP
44
PLCC
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