Features: Single chip transmit and receive interface for E3, DS3 and STS-1 applications.
Interface to 75 ohm coaxial cable over 1100 feet at speeds up to 51.84 Mbps.
Compliant with ANSI T1.102-1993, Telcordia GR-499-CORE and GR-253-CORE, ITU-T G.703 and G.823 for jitter tolerance.
Compliant with ATM FORUM af-phy-0034 (E3 public UNI) and af-phy-0054 (DS3 public UNI).
Easily Interfaced to ATM framer ICs such as PMC 7345 , 7346 QJET and 7321.
Unique clock recovery requires no reference clock or crystal oscillator.
Receive DS3-high and DSX3 monitor signals
Includes diagnostic loop-back for AMI and digital signals.
Includes a selectable B3ZS/HDB3 ENDEC.
Pin compatible to 78P7200 (28-lead PLCC).
28-lead PLCC and 48-lead TQFP packages
3.3 or 5 V operation, ICC<95mA
Input circuit works either Transformer or Capacitor coupledPinout
Specifications
| PARAMETER |
RATING |
| Positive supply, Vcc |
6V |
| Storage temperature |
-65 to 150 |
| Ambient operating temperature |
-40 to +85°C |
Output Pin Voltage (LOUT+, LOUT-)
Input Pin Voltage (LIN+, LIN-) |
VCC -2 to Vcc + 2V |
| Input pin voltage, all other pins |
VCC +0.3 to GND -0.3V |
DescriptionThe 78P2241 is a line interface transceiver IC for E3, DS3, STS-1, NA T3 and ATM applications. It includes clock recovery and transmitter pulse shaping functions for applications using 75-ohm coaxial cable at distances up to 1100 feet. These applications include DSLAMs, T3/E3 digital multiplexers, SONET Add/Drop multiplexers, PDH equipment, DS3 to Fiber optic and microwave modems and ATM WAN access for routers and switches.
The receiver recovers clock and data of the 78P2241 from a B3ZS or HDB3 coded AMI signal. It can compensate for over 12dB of cable and 6dB of flat loss. The transmitter generates a signal that meets the standard pulse shape requirements.
The 28-pin PLCC 78P2241 is pin and functionally compatible to the 78P7200. It adds a B3ZS/HDB3 ENDEC, loop-back and clock polarity selection as well as ability to receive a DSX3 monitor signal.
The 78P2241 is manufactured in an advanced BICMOS process and operates at both 5V and 3.3 V power supply voltages. It consumes less than 95 mA of supply current.
78P2241 Data Sheet
