DS33R11 Ethernet Mapper with Integrated T1/E1/J1 Transceiver

 

 

 

 

 

 

 

NAME

PIN

TYPE

FUNCTION

 

 

 

T1/E1/J1 ANALOG LINE INTERFACE

 

 

 

 

 

 

 

 

 

 

 

Transmit Analog Tip Output for the T1/E1/J1 Transceiver:

 

TTIP

R1, R2

O

Analog line-driver outputs. Two connections are provided to

 

 

improve signal quality. These pins connect via a 1:2 step-up

 

 

 

 

 

 

 

 

 

 

transformer to the network. See Section 10.24 for details.

 

 

 

 

 

Transmit Analog Ring Output for the T1/E1/J1 Transceiver:

 

 

TRING

T1,T2

O

Analog line-driver outputs. Two connections are provided to

 

 

improve signal quality. These pins connect via a 1:2 step-up

 

 

 

 

 

 

 

 

 

 

transformer to the network. See Section 10.24 for details.

 

 

RTIP

K1

I

Receive Analog Tip Input for the T1/E1/J1 Transceiver: Analog

 

 

input for clock recovery circuitry. These pins connect via a 1:1

 

 

 

 

 

transformer to the network. See Section 10.24 for details

 

 

RRING

M1

I

Receive Analog Ring Input for the T1/E1/J1 Transceiver:

 

 

Analog input for clock recovery circuitry. These pins connect via a

 

 

 

 

 

1:1 transformer to the network. See Section 10.24 for details

 

 

 

 

T1/E1/J1 TRANSMIT FRAMER INTERFACE

 

 

 

 

 

 

 

 

 

 

 

Transmit Serial Data Input to the T1/E1/J1 Framer: Transmit

 

TSERI

E3

I

NRZ serial data. Sampled on the falling edge of TCLKT when the

 

 

transmit-side elastic store is disabled. Sampled on the falling edge

 

 

 

 

 

 

 

 

 

 

of TSYSCLK when the transmit-side elastic store is enabled.

 

 

TCLKT

D2

I

Transmit Clock for the T1/E1/J1 Transceiver: 1.544MHz or a

 

 

2.048MHz primary clock. Used to clock data from the TSERI pin

 

 

 

 

 

through the transmit-side formatter.

 

 

 

 

 

Transmit Channel Block for the T1/E1/J1 Transceiver: A user-

 

 

 

 

 

programmable output that can be forced high or low during any of

 

 

TCHBLK

A2

O

the channels. Synchronous with TCLKT when the transmit-side

 

 

elastic store is disabled. Synchronous with TSYSCLK when the

 

 

 

 

 

transmit-side elastic store is enabled. Useful for locating individual

 

 

 

 

 

channels in drop-and-insert applications, for external per-channel

 

 

 

 

 

loopback, and for per-channel conditioning.

 

 

 

 

 

Transmit Channel Clock for the T1/E1/J1 Transceiver: A

 

 

 

 

 

192kHz (T1) or 256kHz (E1) clock that pulses high during the LSB

 

 

TCHCLK

G1

O

of each channel. Can also be programmed to output a gated

 

 

transmit-bit clock for fractional T1/E1 applications. Synchronous

 

 

 

 

 

with TCLKT when the transmit-side elastic store is disabled.

 

 

 

 

 

Synchronous with TSYSCLK when the transmit-side elastic store is

 

 

 

 

 

enabled. Useful for parallel-to-serial conversion of channel data.

 

 

 

 

 

Transmit System Sync for the T1/E1/J1 Transceiver: Only used

 

 

TSSYNC

A5

I

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.

 

 

 

 

 

Transmit Sync for the T1/E1/J1 Transceiver: A pulse at this pin

 

 

 

 

 

will establish either frame or multiframe boundaries for the transmit

 

 

TSYNC

C1

I/O

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 TR.IOCR1.3 to output double-wide pulses at

 

 

 

 

 

signaling frames in T1 mode.

 

 

 

 

 

Transmit System Clock for the T1/E1/J1 Transceiver:

 

 

TSYSCLK

E4

I

1.544MHz, 2.048MHz, 4.096MHz, 8.192MHz, or 16.384MHz clock.

 

 

Only used when the transmit-side elastic-store function is enabled.

 

 

 

 

 

Should be tied low in applications that do not use the transmit-side

 

 

 

 

 

elastic store.

 

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Image 31
Maxim DS33R11 specifications Name PIN Type Function T1/E1/J1 Analog Line Interface, T1/E1/J1 Transmit Framer Interface