ML4632 datasheet(2/8 Pages) MICRO-LINEAR

部件名	ML4632

功能描述	Fiber Optic LED Driver

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制造商	MICRO-LINEAR [Micro Linear Corporation]

网页	http://www.microlinear.com

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2 / 8 page

ML4632

2

PIN CONFIGURATION

NAME

FUNCTION

ECLN

Negative ECL data input. Tie to VBIAS for

single ended ECL operation or when ECLP is

used as an enable. Tie to ground during TTL

only operation.

VBIAS

BIAS voltage for single ended ECL operation.

LED

Fiber optic LED drive pin. Connect the LED

between this pin and VCC.

GND

Negative power supply. The pin should be

tied to the grounded side of RTSET to improve

output accuracy and avoid a ground loop.

RTSET

Output current programming pin. Connect a

resistor of value VDRV/ILED from this pin to

ground to set the high LED output current.

RPK

Peaking circuit bias pin. Connect a resistor of

value VDRV/IPEAK from this pin to ground

when using the peaking circuit. Leave open

circuited when peaking is not used.

PEAK

Peaking circuit output pin. When using

peaking, connect this pin to VCC through a

resistor of value RRPK. Then connect a

capacitor from this pin to the LED cathode.

When peaking is not used, open circuit RPK.

PIN DESCRIPTION

NAME

FUNCTION

VCC

Positive power supply. +5 volts.

IOFF

Connect a resistor from this pin to VCC to

increase the off current to the LED, i.e. 4.3K

Ω

for 1mA. With this pin open, the default IOFF

current is between 0.5–1.0mA.

VREF

A constant 1.2V reference output used to set

up DRV.

DRV

A DC input that sets the positive swing on

RTSET and the high level output current to

the LED.

PTAT

Proportional to Absolute Temperature. A 1.0V

reference at 25

°C that moves proportional to

absolute temperature, also used to set up

DRV. (See figure 1)

TTL

TTL data input. Can also be used as an enable

during ECL operation. TTL = High (enabled),

TTL = Low (disabled).

ECLP

Positive ECL data input controls signal to the

LED. Tie to VBIAS during TTL only operation

or use as an enable.

ECLP

TTL

PTAT

DRV

VREF

IOFF

VCC

ECLN

VBIAS

LED

GND

RTSET

RPK

PEAK

14

13

12

11

10

9

8

1

2

3

4

5

6

7

TOP VIEW

ML4632

14-Pin PDIP (P14)

ML4632

16-Pin Wide SOIC (S16W)

TOP VIEW

ECLN

VBIAS

LED

GND

RTSET

RPK

PEAK

NC

ECLP

TTL

PTAT

DRV

VREF

IOFF

VCC

NC

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

类似零件编号 - ML4632

制造商	部件名	数据表	功能描述
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类似说明 - ML4632

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