DS21455 Maxim Integrated Products, DS21455 Datasheet - Page 21

• 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

Signal Name:
Signal Description:
Signal Type:
A pulse at this pin will establish either frame or multiframe boundaries for the transmit side. Can be programmed to output
either a frame or multiframe pulse. If this pin is set to output pulses at frame boundaries, it can also be set via IOCR1.3 to
output double-wide pulses at signaling frames in T1 mode.
Signal Name:
Signal Description:
Signal Type:
Only used when the transmit-side elastic store is enabled. A pulse at this pin will establish either frame or multiframe
boundaries for the transmit side. Should be tied low in applications that do not use the transmit-side elastic store.
Signal Name:
Signal Description:
Signal Type:
When enabled, this input will sample signaling bits for insertion into outgoing PCM data stream. Sampled on the falling edge
of TCLK when the transmit-side elastic store is disabled. Sampled on the falling edge of TSYSCLK when the transmit-side
elastic store is enabled.
Signal Name:
Signal Description:
Signal Type:
Updated on the rising edge of TCLKO with the bipolar data out of the transmit-side formatter. Can be programmed to source
NRZ data via the output-data format (IOCR1.0)-control bit. This pin is normally tied to TPOSI.
Signal Name:
Signal Description:
Signal Type:
Updated on the rising edge of TCLKO with the bipolar data out of the transmit-side formatter. This pin is normally tied to
TNEGI.
Signal Name:
Signal Description:
Signal Type:
Buffered clock that is used to clock data through the transmit-side formatter (either TCLK or RCLKI). This pin is normally
tied to TCLKI.
Signal Name:
Signal Description:
Signal Type:
Sampled on the falling edge of TCLKI for data to be transmitted out onto the T1 line. Can be internally connected to TPOSO
by tying the LIUC/TPD pin high. See the LIUC/TPD pin description for a full explanation of this function. TPOSI and
TNEGI can be tied together in NRZ applications.
TSYNC
Transmit Sync
Input/Output
TSSYNC
Transmit System Sync
Input
TSIG
Transmit Signaling Input
Input
TPOSO
Transmit Positive-Data Output
Output
TNEGO
Transmit Negative-Data Output
Output
TCLKO
Transmit Clock Output
Output
TPOSI (DS21455 Only)
Transmit Positive-Data Input
Input
21 of 270