DS2290 Ver la hoja de datos (PDF) - Dallas Semiconductor -> Maxim Integrated

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DS2290

T1 Isolation Stik

Dallas Semiconductor -> Maxim Integrated 

TYPICAL DS2290 APPLICATION Figure 4

LCLK

LPOS

LNEG

RX+

RX–

B8ZS

LB2

RECEIVE

T1 PAIR

RXTIP

RXRING

LPWR–

LPWR+

TXTIP

TXRING

TRANSMIT

T1 PAIR

TPOS

TNEG

TCLK

LB0

LB1

TAIS

LB

RX+

RX–

RCLK

RPOS

RNEG

B8ZS

BPV

PCS

DJA

RST

LCLK

LNEG

LPOS

LOCK RCLLB

DS2290

RCLK

RPOS

RNEG

RSER

TPOS

TNEG

TCLK

TSER

SERIAL

PORT

DS2250

SOFT MICROCONTROLLER Stik

NETWORK SIDE PIN DESCRIPTION Table 1

PIN SYMBOL I/O

DESCRIPTION

25 RXTIP

27 RXRING

I Receive Tip and Ring Inputs. Connects directly to the receive T1 twisted pair.

These inputs are transformer coupled and terminated at 100 ohms. See Figure

2.

28 TXTIP

30 TXRING

O Transmit Tip and Ring Outputs. Connects directly to the transmit T1 twisted

pair. Output signal level is programmable via the LB0 to LB2 pins. (See Table 3.)

26 LPWR+

29 LPWR–

– Loop Power Connections. These pins connect to the internal center–taps of

the transmit and receive transformers. They provide access to the DC power

on the T1 line (may not be provided by carriers in the future). Tie together if no

simplex power arrangement is needed.

022798 5/9

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