DS21455 Maxim Integrated Products, DS21455 Datasheet - Page 170

• Manufacturer Part Number: DS21455
• Description: Network Controller & Processor ICs Quad E1-T1-J1 Single -Chip Transceiver (S
• Manufacturer: Maxim Integrated Products

Specifications of DS21455

• Product: Framer
• Number Of Transceivers: 4
• Data Rate: 64 Kbps
• Supply Voltage (max): 3.465 V
• Supply Voltage (min): 3.135 V
• Supply Current (max): 328 mA
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Package / Case: BGA

Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bits 0 to 3/Receive Level Bits (RL0 to RL3). Real-time bits.
Bit 4/Transmit Open-Circuit Detect (TOCD). A real-time bit set when the device detects that the TTIP and TRING outputs
are open-circuited.
Bit 5/Transmit Current Limit Exceeded (TCLE). A real-time bit set when the 50mA (RMS) current limiter is activated,
whether the current limiter is enabled or not.
Bit 6/BOC Detected (BD). A real-time bit that is set high when the BOC detector is presently seeing a valid sequence and set
low when no BOC is currently being detected.
Bit 7/BERT Real-Time Synchronization Status (BSYNC). Real-time status of the synchronizer (this bit is not latched). Will
be set when the incoming pattern matches for 32 consecutive bit positions. Will be cleared when six or more bits out of 64 are
received in error. Refer to BSYNC in the BERT status register, SR9, for an interrupt-generating version of this signal.
RL3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
RL2
BSYNC
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
7
0
RL1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
BD
INFO2
Information Register 2
11h
6
0
RL0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
TCLE
RECEIVE LEVEL
5
0
Greater than -2.5
Less than -37.5
-30.0 to –32.5
-10.0 to -12.5
-12.5 to -15.0
-15.0 to -17.5
-17.5 to -20.0
-20.0 to -22.5
-22.5 to -25.0
-25.0 to -27.5
-27.5 to -30.0
-32.5 to -35.0
-35.0 to -37.5
-7.5 to -10.0
-2.5 to -5.0
-5.0 to -7.5
(dB)
TOCD
4
0
170 of 270
RL3
3
0
RL2
2
0
RL1
1
0
RL0
0
0