mt8981dl Mitel, mt8981dl Datasheet - Page 2

• Manufacturer Part Number: mt8981dl
• Description: Iso-cmos St-bus ?amily Digital Switch
• Manufacturer: Mitel

MT8981D
Pin Description
2-18
DIP
2-4
6-9
10
11
40
1
5
Pin #
PLCC
8-11
STi3
VDD
3-5
44
12
13
C4i
F0i
2
7
A0
A1
A2
IC
IC
IC
IC
QFP
41-
2-5
40
43
44
6
1
7
7
8
9
10
11
12
13
14
15
16
17
Name
ISO-CMOS
STi0-
STi2
STi3 ST-BUS Input 3 (Input). These are the inputs for the 2048 kbit/s ST-BUS input
DTA
V
F0i
44 PIN PLCC
IC
DD
Data Acknowledgement (Open Drain Output). This is the data acknowledgement
on the microprocessor interface. This pin is pulled low to signal that the chip has
processed the data. A 909 , 1/4W, resistor is recommended to be used as a pullup.
ST-BUS Input 0 to 2 (Inputs). These are the inputs for the 2048 kbit/s ST-BUS input
streams.
streams.
Internal Connections. Must be connected to V
Power Input. Positive Supply.
Framing 0-Type (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.
39
38
37
36
35
34
33
32
31
30
29
Figure 2 - Pin Connections
VDD
DTA
STi0
STi1
STi2
STi3
40 PIN CERDIP/PLASTIC DIP
R/W
C4i
F0i
DS
A0
A1
A2
A3
A4
A5
IC
IC
IC
IC
STo3
IC
IC
IC
IC
VSS
D0
D1
D2
D3
D4
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
STi3
VDD
Description
IC
ODE
STo0
STo1
STo2
STo3
IC
IC
IC
IC
VSS
D0
D1
D2
D3
D4
D5
D6
D7
CS
C4i
F0i
A0
A1
A2
IC
IC
IC
IC
1
2
3
4
5
6
7
8
9
10
11
DD
.
44 PIN QFP
33
32
31
30
29
28
27
26
25
24
23
STo3
IC
IC
IC
IC
VSS
D0
D1
D2
D3
D4