Features: ` 5 V operation
` Per-channel programmable gains, equalization, termination impedance, and hybrid balance
` Programmable m-law, linear, or A-law modes
- Up to 256 time slots per frame
- Supports PCM data rates of 512 kbits/s to 16.384 Mbits/s
- Double-clock mode timing compatible with ISDN standard interfaces
` Fully programmable time-slot assignment with bit offset
` Analog and digital loopback test modes
` Serial microprocessor interface
- Normal and byte-by-byte control modes
- Fast scan mode
` Six bidirectional control leads per channel, for SLIC and line card function control
` Differential analog output
- Mates directly to SLICs, eliminating external components
` Sigma-delta converters with dither noise reduction
` Quad design to minimize package count on dense line card applications
` Meets or exceeds ITU-T G.711 -G.712 and relevant
Telcordia Technologies* requirementsDescriptionThe T8536A consists of four independent channels of codec and digital signal processing functions on one chip. In addition to the classic A-to-D and D-to-A conversion, each channel provides termination impedance synthesis and a hybrid balance network.
The T8536A is controlled by a serial microprocessor interface, and a series of bidirectional I/O leads are provided so that this control mechanism can be utilized to operate the battery feed device, ringing voltage switches, etc. Common data and clock paths can be shared over any number of devices. All the filter coefficients, signal processing, SLIC, and test features are accessible through this interface. This serial interface can be operated at speeds up to 4.096 Mbits/s.
4.096 Mbits/s.
The choice of a PCM bus is also programmable, with any channel capable of being assigned to any time slot. The PCM bus can be operated at speeds up to 6.384 Mbits/s, allowing for a maximum of 256 time slots. Separate transmit and receive interfaces are available for 4-wire bus designs, or they can be strapped together for a 2-wire PCM bus.
The T8536A is available in four packages.
The T8536A 64-pin TQFP features five data latches per channel and has two PCM ports.
The T8536A 100-pin TQFP features six data latches per channel and has two PCM ports.
The T8536A 68-pin PLCC features six data latches per channel and has one PCM port.
The T8535A 44-pin PLCC has no data latches and one PCM port.
The T8536A and the T8533 Quad Programmable Line Card Signal Processor with Echo Cancellation are pin compatible, as are the T8536A 68-pin PLCC device and the T8534 68-pin PLCC Quad Programmable Line Card Signal Processor with Echo Cancellation.
T8536A Data Sheet
