ML53301/ML53311 TC-622Pro/Pro+
622 Mbps ATM Transmission Convergence Sublayer SONET Framer
1. DESCRIPTION
The ML53301 TC-622Pro and ML53311 TC-622Pro+ are single-chip integrated circuit devices that per-
form Asynchronous Transfer Mode (ATM) transmission convergence sub-layer functions for the public
User Network Interface (UNI) using the Synchronous Optical Network (SONET) processing standard.
The physical layer supports the STS-12/STS-12c 622 Mbps SONET/SDH format. The STS-12 mode of
operation supports four separate STS-3c (155 Mbps) channels. STS-12c mode supports a single 622 Mbps
channel. The TC-622Pro/Pro+ can be used to interface an ATM terminal to an ATM switching system via
the SONET/SDH Interface.
The ML53301 TC-622Pro contains a full-featured 32-bit PCI Bus interface for accessing the register array.
The ML53311 TC-622Pro+ contains a simplified 16-bit microprocessor interface (MPI) ideal for use in
low-cost applications. Figure 1 shows a typical STS-12/12c application using the TC-622Pro/Pro+.
Figure 2 shows a block diagram of the ML53301 TC-622Pro and ML53311 TC-622Pro+ devices.
2. FEATURES
• STS-12/12c modes under register control
• UTOPIA level 2 Multi-PHY (MPHY) interface
• Full-featured 32-bit PCI bus interface (TC-622Pro)
• Low cost 16-bit MPI bus interface (TC-622Pro+)
• Test cell insertion and extraction
• Four receive and four transmit cell processors
• Lower power mode reduces power consumption to
1.3 W maximum
• Four STS-3c frames multiplexed to construct one STS-
12 frame.
• One STS-12 frame demultiplexed to construct four
STS-3 frames
• Separate performance monitors for individual cell
processors
• Line and Path alarm indication signal inserted into
the transmit signal
• Loss of signal (LOS), loss of frame synchronization
(LOF), loss of pointer (LOP), and loss of cell
delineation (LCD) conditions detected in the
incoming signal
• Transmit processor handles single or octet-wide cell
streams
• 176-pin LQPF package for both devices
TC-622Pro/Pro+
External
Converter
Transmit
Framer
Transmit Core
Logic
Transmit
UTOPIA
TxD
Line Data
RxD
Parallel
to Serial
8
8
TxData [15:0]
RxData [15:0]
Optical
Transceiver
ATM Layer
Serial to
Parallel
Receive
Framer
Receive Core
Logic
Receive
UTOPIA
Microprocessor Interface
PCI Bus (TC-622Pro)
MPI Bus (TC-622Pro+)
Figure 1. Typical STS12/12c Application
Oki Semiconductor
1
OKI [ OKI ELECTRONIC COMPONETS ]
