MT9043 Zarlink Semiconductor, MT9043 Datasheet - Page 2

• Manufacturer Part Number: MT9043
• Description: T1/E1 System Synchronizer
• Manufacturer: Zarlink Semiconductor

Pin Description
23,31
28,35
Pin #
1,10,
7,17
2
3
4
5
6
8
Name
TCLR
OSCo
RST
SEC
V
PRI
V
IC
DD
SS
Ground. 0 Volts. (Vss pads).
Reset (Input). A logic low at this input resets the MT9043. To ensure proper operation, the
device must be reset after reference signal frequency changes and power-up. The RST
pin should be held low for a minimum of 300ns. While the RST pin is low, all frame pulses
except RST and TSP and all clock outputs except C6o, C16o and C19o are at logic high.
The RST, TSP, C6o and C16o are at logic low during reset. The C19o is free-running
during reset. Following a reset, the input reference source and output clocks and frame
pulses are phase aligned as shown in Figure 12.
TIE Circuit Reset (Input). A logic low at this input resets the Time Interval Error (TIE)
correction circuit resulting in a realignment of input phase with output phase as shown in
Figure 13. The TCLR pin should be held low for a minimum of 300ns. This pin is internally
pulled down to VSS.
Internal Connection. Leave open circuit.
Secondary Reference (Input). This is one of two (PRI & SEC) input reference sources
(falling edge) used for synchronization. One of four possible frequencies (8kHz, 1.544MHz,
2.048MHz or 19.44MHz) may be used. The selection of the input reference is based upon the
MS, and RSEL, control inputs.This pin is internally pulled up to V
Primary Reference (Input). See pin description for SEC. This pin is internally pulled up to
V
Positive Supply Voltage. +3.3V
Oscillator Master Clock (CMOS Output). For crystal operation, a 20MHz crystal is
connected from this pin to OSCi, see Figure 9. Not suitable for driving other devices. For
clock oscillator operation, this pin is left unconnected, see Figure 8.
DD
.
FLOCK
LOCK
C1.5o
OSCo
TCLR
C19o
OSCi
F16o
RSP
SEC
RST
TSP
Vdd
C2o
V
C4o
Vdd
PRI
Vss
F0o
F8o
Vss
SS
IC
IC
Figure 2 - Pin Connections
Zarlink Semiconductor Inc.
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
2
3
4
5
6
7
8
9
MT9043
MT9043AN
DC
2
nominal.
Description
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
TMS
TCK
TRST
TDI
TDO
IC
IC
FS1
FS2
IC
RSEL
IC
MS
Vdd
IC
IC
NC
Vss
IC
IM
Vdd
C6o
C16o
C8o
DD
.
Data Sheet