MT9173 Datasheet, PDF (2/22 Pages) Mitel Networks Corporation – Digital Subscriber Interface Circuit with RxSB

MT9173/74
Preliminary Information
LOUT 1
VBias ²
VRef 3
MS2 4
MS1 ⁵
MS0 6
RegC 7
RxSB 8
F0/CLD ⁹
CDSTi/CDi ¹⁰
CDSTo/CDo ¹¹
VSS ¹²
24 _VDD
23 _LIN
22 _TEST
21 _{LOUT DIS}
20 _Precan
19 _OSC1
18 NC
17 OSC2
16 _C4/TCK
15 F0o/RCK
14 DSTi/Di
13 DSTo/Do
MS2 ⁵
•
25 NC
NC ⁶
24 LOUT DIS
MS1 ⁷
23 Precan
MS0 8
22 OSC1
RegC 9
21 OSC2
RxSB ¹⁰
20 NC
F0/CLD ¹¹
19 _C4/TCK
24 PIN PDIP/ SSOP
28 PIN PLCC
Figure 2 - Pin Connections
Pin Description
Pin #
24 28
Name
Description
1
2
L_OUT Line Out. Transmit Signal output (Analog). Referenced to V_Bias.
2
3
V_Bias Internal Bias Voltage output. Connect via 0.33 µF decoupling capacitor to V_DD.
3
4
V_Ref Internal Reference Voltage output. Connect via 0.33 µF decoupling capacitor to V_DD.
4,5, 5,7, MS2-MS0 Mode Select inputs (Digital). The logic levels present on these pins select the various
6
8
operating modes for a particular application. See Table 1 for the operating modes.
7
9
RegC Regulator Control output (Digital). A 512 kHz clock used for switch mode power
supplies. Unused in MAS/MOD mode and should be left open circuit.
8
10
RxSB Receive Sync Bit output (Digital). In DN mode, this output is held high until receive
synchronization occurs (i.e., until the sync bit in Status Register =1). Once low,
indicating synchronized transmission, a high going pulse (6.24 µs wide pulse @ 160
kb/s and 12.5 µs wide @ 80 kb/s) indicates the temporal position of the receive
"SYNC" bit in the biphase line transmission. Inactive and low in MOD mode.
9 11 F0/CLD Frame Pulse/C-Channel Load (Digital). In DN mode a 244 ns wide negative pulse
input for the MASTER indicating the start of the active channel times of the device.
Output for the SLAVE indicating the start of the active channel times of the device.
Output in MOD mode providing a pulse indicating the start of the C-channel.
10 12 CDSTi/ Control/Data ST-BUS In/Control/Data In (Digital). A 2.048 Mbit/s serial control &
CDi signalling input in DN mode. In MOD mode this is a continuous bit stream at the bit
rate selected.
11 13 CDSTo/ Control/Data ST-BUS Out/Control/Data Out (Digital). A 2.048 Mbit/s serial control &
CDo signalling output in DN mode. In MOD mode this is a continuous bit stream at the bit
rate selected.
12 14
V_SS Negative Power Supply (0V).
13 15 DSTo/Do Data ST-BUS Out/Data Out (Digital). A 2.048 Mbit/s serial PCM/data output in DN
mode. In MOD mode this is a continuous bit stream at the bit rate selected.
14 16 DSTi/Di Data ST-BUS In/Data In (Digital). A 2.048 Mbit/s serial PCM/data input in DN mode.
In MOD mode this is a continuous bit stream at the bit rate selected.
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