ML4632
PIN CONFIGURATION
ML4632
14-Pin PDIP (P14)
ECLN
VBIAS
LED
GND
RTSET
RPK
PEAK
1
2
3
4
5
6
7
14
13
12
11
10
9
8
ECLP
TTL
PTAT
DRV
VREF
I
OFF
V
CC
ML4632
16-Pin Wide SOIC (S16W)
ECLN
VBIAS
LED
GND
RTSET
RPK
PEAK
NC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
ECLP
TTL
PTAT
DRV
VREF
I
OFF
V
CC
NC
TOP VIEW
TOP VIEW
PIN DESCRIPTION
NAME
FUNCTION
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.
BIAS voltage for single ended ECL operation.
Fiber optic LED drive pin. Connect the LED
between this pin and V
CC
.
Negative power supply. The pin should be
tied to the grounded side of RTSET to improve
output accuracy and avoid a ground loop.
Output current programming pin. Connect a
resistor of value V
DRV
/I
LED
from this pin to
ground to set the high LED output current.
Peaking circuit bias pin. Connect a resistor of
value V
DRV
/I
PEAK
from this pin to ground
when using the peaking circuit. Leave open
circuited when peaking is not used.
Peaking circuit output pin. When using
peaking, connect this pin to V
CC
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.
V
CC
I
OFF
Positive power supply. +5 volts.
Connect a resistor from this pin to V
CC
to
increase the off current to the LED, i.e. 4.3KΩ
for 1mA. With this pin open, the default I
OFF
current is between 0.5–1.0mA.
A constant 1.2V reference output used to set
up DRV.
A DC input that sets the positive swing on
RTSET and the high level output current to
the LED.
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 data input. Can also be used as an enable
during ECL operation. TTL = High (enabled),
TTL = Low (disabled).
Positive ECL data input controls signal to the
LED. Tie to VBIAS during TTL only operation
or use as an enable.
VBIAS
LED
GND
VREF
DRV
RTSET
PTAT
RPK
TTL
PEAK
ECLP
2
MICRO-LINEAR [ MICRO LINEAR CORPORATION ]
