TZA3031 데이터 시트보기 (PDF) - Philips Electronics

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TZA3031

SDH/SONET STM1/OC3 laser drivers

Philips Electronics 

Philips Semiconductors

SDH/SONET STM1/OC3 laser drivers

Product specification

TZA3031AHL; TZA3031BHL;

TZA3031U

handbook, full pagewidth

GND 1

MONIN 2

GND 3

TONE 4

TZERO 5

BGAP 6

VCC(G) 7

GND 8

TZA3031BHL

24 GND

23 ZERO

22 ONE

21 VCC(R)

20 DLOOPQ

19 DLOOP

18 VCC(R)

17 GND

MBK845

Fig.4 Pin configuration of TZA3031BHL.

FUNCTIONAL DESCRIPTION

The TZA3031AHL, TZA3031BHL and TZA3031U laser

drivers accept a 155 Mbits/s STM1 Non-Return to Zero

(NRZ) input data stream, and generate an output signal

with sufficient current to drive a solid state Fabry Perot

(FP) or Distributed FeedBack (DFB) laser. They also

contain dual loop control circuitry for stabilizing the true

laser optical power levels representing logic 1 and logic 0.

The input buffers present a high impedance to the data

stream on the differential inputs (pins DIN and DINQ);

see Fig.5. The input signal can be at a CML level of

approximately 200 mV (p-p) below the supply voltage, or

at a PECL level up to 800 mV (p-p). The inputs can be

configured to accept CML signals by connecting pins DIN

and DINQ to VCC(R) via external 50 Ω pull-up resistors.

If PECL compatibility is required, the usual Thevenin

termination can be applied.

handbook, full pagewidth

10 kΩ

DIN, DLOOP

100 Ω

VCC(R)

10 kΩ

100 Ω

DINQ, DLOOPQ

2000 Feb 22

GND MGS910

Fig.5 DIN/DINQ and DLOOP/DLOOPQ inputs.

6

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