• The CP1121A is one of the OPTRANS series chips designed by Chiphomer Technology Limited. It is extended to provide a flexible, low cost System-on-chip (SOC) solution for fast growing metropolitan

transmission market, especially in Multi-service Transport Platform (MSTP) and Customer Premises Equipment (CPE) applications. It integrated one SDH overhead processor for dual STM-4 or dual STM-1, one extend interface for dual STM-4s or dual STM-1s, a tributary unit payload processor for 8 STM-1, E1 mapper for asynchronous mapping and demapping of 21 port E1, a 18 X 18 high and low order cross connecter.

• SDH Overhead Processor

- Dual channel SDH STM-4 or STM-1 Serial LVDS interfaces

- Dual channel multi-rate CDR macro is integrated

- High jitter performance complies with ITU-T specification

- Regenerator and multiplex section overheads are terminated

- High order AU-4 pointer interpretation and generation

- VC-4 path overheads termination

- Full access SOH through external serial interfaces

- Support path loop-back

- Support Multiplex Section Protection Switch

• TUPP

- Process TU-12/TU-3 Pointer

- Aligns SDH tributary unit within 8 STM-1.

- TU3 or TU12 modefor every TUG3 in AU4

- Bypass mode for VC-4 Applications

• Extended interface supports

- Two byte-width 19.44 Telecom Bus, or two byte-wide 77.76MHz Telecom Bus, or

- Two 2bit-width 77.76MHz Telecom Bus

• 21 channel E1 mapper

- 21 channels E1 asynchronous mapping and de-mapping to/from a STM-1.

- 1+1 path protection, re-timing mode for channel #0 to #7

• High and low order cross connecter

- 18 X 18 STM-1 non-blocking switching for high order or low order

• Provides 16-bit Intel/Motorola microprocessor interface

• 1.8V/3.3V power supply. 3.3V CMOS I/O. LVDS I/O

• Supports IEEE 1149.1 boundary scan

• Operating Industrial temperature range: -40℃—85℃

• Maximum power consumption less then 2.9W

• TEBGA 421 package

SDH Add/Drop Multiplexers、SDH Ternimal Multiplexers、Multi-service Transport Platform (MSTP)、Customer Premises Equipment (CPE)