mh89760b Mitel, mh89760b Datasheet - Page 2

• Manufacturer Part Number: mh89760b
• Description: St-bus? Family T1/esf Framer & Interface
• Manufacturer: Mitel

MH89760B
4-56
Pin Description
Pin #
10
11
12
13
14
15
16
2
3
4
5
6
7
8
9
Name
CSTi1
CSTi0
E1.5o
E8Ko
CSTo
RxR
RxA
RxT
RxB
XCtl
V
XSt
NC
NC
NC
DD
No Connection.
1.544 MHz Extracted Clock (Output): This clock is extracted by the device from the
received DS1 signal. It is used internally to clock in data received at RxT and RxR.
System Power Supply. +5V.
Received A (Output): The bipolar DS1 signal received by the device at RxR and RxT is
converted to a unipolar format and output at this pin.
Receive Tip and Ring Inputs: Bipolar split phase inputs designed to be connected
directly to the input transformer.
Impedance between pins=430 .
Received B (Output): The bipolar DS1 signal received by the device at RxR and RxT is
converted to a unipolar format and output at this pin.
No Connection.
Control ST-BUS Input #1: A 2048 kbit/s serial control stream which carries 24 per-
channel control words.
Control ST-BUS Input #0: A 2048 kbit/s serial control stream that contains 24 per
channel control words and two master control words.
8 kHz Extracted Clock (Output): This is an 8 kHz output generated by dividing the
extracted 1.544 MHz clock by 193 and aligning it with the received DS1 frame.
kHz signal can be used for synchronizing system clocks to the extracted 1.544 MHz
clock. When digital loopback is enabled, the 8kHz is derived from C1.5.
External Control (Output): This is an uncommitted external output pin which is set or
reset via bit 3 in Master Control Word 1 on CSTi0. The state of XCtl is updated once per
frame.
External Status (Schmitt Trigger Input): The state of this pin is sampled once per
frame and the status is reported in bit 5 of Master Status Word 2 on CSTo.
Control ST-BUS Output: This is a 2048 kbit/s serial control stream which provides the
24 per-channel status words, and two master status words.
No Connection.
CSTi1
CSTi0
E1.5o
E1.5o
CSTo
E8Ko
DSTi
VDD
RxR
RxA
RxT
RxB
XCtl
XSt
C2i
NC
NC
NC
F0i
Figure 2 - Pin Connections
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Impedance to ground is approximately 1k .
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
Description
NC
NC
LOS
NC
TxFDL
NC
TxFDLClk
VSS
RxFDLClk
DSTo
RxFDL
OUTB
C1.5i
RxSF
TxSF
OUTA
NC
NC
NC
VSS
Preliminary Information
The 8