82P2821BH IDT, Integrated Device Technology Inc, 82P2821BH Datasheet - Page 18

• Manufacturer Part Number: 82P2821BH
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of 82P2821BH

• Number Of Transceivers: 1
• Screening Level: Industrial
• Mounting: Surface Mount
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Lead Free Status / RoHS Status: Not Compliant

2
Note:
1. The pin number of the pins with the footnote ‘n’ is listed in order of channel (CH0 ~ CH21).
2. The content in the brackets indicates the position and the register name of the preceding bit. After the register name, if the punctuation ‘,...’ is followed, this bit is in a per-channel register.
If there is no punctuation following the address, this bit is in a global register or in a channel 0 only register. The addresses and details are included in Chapter 5 Programming Information.
3. XCLK is derived from MCLK. It is 1.544 MHz in T1/J1 mode or 2.048 MHz in E1 mode.
Pin Description
IDT82P2821
(n=0~21)
(n=0~21)
RRINGn
TRINGn
RTIPn
Name
TTIPn
PIN DESCRIPTION
Output
Input
I / O
L26, G26, F28, D6, D4, D3, G4, H5,
H30, E30, C30, A6, B4, B3, D1, E1,
K26, F26, E28, E6, D5, E3, F4, G5,
J30, F30, D30, A5, A4, A3, C1, F1,
AE26, AA26, W28, T28, R26, L28,
AD30, AA30, W30, T30, P30, L30,
P3, R5, V4, W5, AA4, AB5, AE28,
AD26, Y26, W27, R28, P26, K28,
K1, M2, R2, T1, W1, AA2, AE30,
AC30, Y30, V30, R30, N30, K30,
N3, P5, U4, V5, Y4, AA5, AD28,
L1, M1, R1, U1, Y1, AA1, AF30,
Pin No.
M5
L5
J1
J2
1
RTIPn / RRINGn: Receive Bipolar Tip/Ring for Channel 0 ~ 21
The receive line interface supports both Receive Differential mode and Receive Single Ended
mode.
In Receive Differential mode, the received signal is coupled into RTIPn and RRINGn via a 1:1
transformer or without a transformer (transformer-less).
In Receive Single Ended mode, RRINGn should be left open. The received signal is input on
RTIPn via a 2:1 (step down) transformer or without a transformer (transformer-less).
These pins will become High-Z globally or channel specific in the following conditions:
TTIPn / TRINGn: Transmit Bipolar Tip /Ring for Channel 0 ~ 21
The transmit line interface supports both Transmit Differential mode and Transmit Single
Ended mode.
In Transmit Differential mode, TTIPn outputs a positive differential pulse while TRINGn out-
puts a negative differential pulse. The pulses are coupled to the line side via a 1:2 (step up)
transformer or without a transformer (transformer-less).
In Transmit Single Ended mode, TRINGn should be left open (it is shorted to ground inter-
nally). The signal presented at TTIPn is output to the line side via a 1:2 (step up) transformer.
These pins will become High-Z globally or channel specific in the following conditions:
Refer to Section 3.3.8 Output High-Z on TTIP and TRING for details.
Line Interface
• Global High-Z:
• Per-channel High-Z
• Global High-Z:
• Per-channel High-Z
- Connecting the RIM pin to low;
- Loss of MCLK
- During and after power-on reset, hardware reset or global software reset;
- Receiver power down by writing ‘1’ to the R_OFF bit (b5, RCF0,...)
- Connecting the OE pin to low;
- Loss of MCLK;
- During and after power-on reset, hardware reset or global software reset;
- Writing ‘0’ to the OE bit (b6, TCF0,...)
- Loss of TCLKn in Transmit Single Rail NRZ Format mode or Transmit Dual Rail NRZ
- Transmitter power down by writing ‘1’ to the
- Per-channel software reset;
- The THZ_OC bit (b4, TCF0,...) is set to ‘1’ and the transmit driver over-current is
21(+1) CHANNEL HIGH-DENSITY T1/E1/J1 LINE INTERFACE UNIT
Format mode, except that the channel is in Remote Loopback or transmit internal pat-
tern with XCLK
detected.
18
3
;
Description
2
;
T_OFF bit (b5, TCF0,...);
February 6, 2009