M66515FP データシートの表示（PDF） - Renesas Electronics

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M66515FP

Laser Diode Driver/Controller

Renesas Electronics 

M66515FP

Pin Configuration (top view)

Description of Pin

Pin name

LD

PD

RS

RB

VB

DATA

1RM, 2RM

ENB

RO

S/H

CH

Vref

Vr

TEST

VCC1

VCC2

GND1

GND2

Name

Laser current output

Monitor diode input

Switching current setting load

output

Bias current setting load

output

Bias current setting voltage

input

Switching data input

Load input for monitoring

Laser current enable input

Laser current load output

Sample hold control input

Hold capacitor load

input/output

Reference voltage output

Reference voltage input

Test pin

Power supply pin 1

Power supply pin 2

GND pin 1

GND pin 2

Function

Connected to the semiconductor LD cathode

Connected to the monitor PD anode

Connects the load resistance to set the current for switching (ISW) to GND

Connects the load resistance to set the bias current (IB) to GND. If IB is not

used, this pin should be left open.

The bias current value (IB) can be set by applying a voltage to this pin. If IB

is not used, this pin should be left open.

At "L", the current ISW+IB flows to the LD; at "H", the current to the LD is IB

Connect a load resistance to convert the monitor PD current to a voltage

across 1RM and 2RM

When "H", all current source circuits are turned off

Connect a laser current load resistance between this pin and VCC

When "L", sample (APC) operation is performed; when "H", hold

(switching) is performed

Connect a hold capacitor between this pin and GND. This pin is connected

within the M66515 to the sample hold circuit output and ISW current source

input.

Output pin for the M66515 internal reference voltage (1.2 V typ)

A reference voltage is applied to cause operation of the comparator within

the sample hold circuit. When using the reference voltage within the

M66515, this pin should be connected to the Vref pin.

Pin used for testing at time of shipment of the M66515; should be left open

Power supply for the internal analog system; connect to a positive power

supply (+5 V)

Power supply for the internal digital system; connect to a positive power

supply (+5 V)

GND for internal analog system

GND for internal digital system

Rev.1.00, Sep.22.2003, page 2 of 11

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