RCV1551-DN Agilent(Hewlett-Packard), RCV1551-DN Datasheet - Page 2

• Manufacturer Part Number: RCV1551-DN
• Description: Fiber Optic Light to Logic Receiver
• Manufacturer: Agilent(Hewlett-Packard)

Connection Diagram
Top View
Pin Descriptions
Pins 5, 17, 18, 19, 20 NC:
These pins are not connected and
should be left open circuit on the
application PCB.
Pins 1, 2, 3, 4, 6, 8, 13, 15, 16
GND:
These pins should be connected
to the circuit ground.
Pins 7, 9, DATA, DATA:
These pins provide complemen-
tary PECL DATA and DATA
outputs. The DATA output is
noninverting, an optical pulse
causes the DATA output to go to
the PECL logic high state (+4 V
nominal).
PD BIAS
DATA
DATA
GND
GND
GND
GND
GND
GND
NC
1
2
3
4
5
6
7
8
9
10
Pin 10, PD Bias:
This pin must be connected to
any voltage from 0 V (GND) to
-5 V. This provides the
photodiode bias. The current
drawn is directly proportional
to the average received
photocurrent.
I = Responsitivity x Mean Power.
The responsivity will be between
0.7 A/W and 1.0 A/W.
Pin 11, +5 V:
This pin should be connected to
+5 V supply. The network shown
below should be placed as close
as possible to pin 11.
PIN 11
FIBER PIGTAIL
20
19
18
17
16
15
14
13
12
11
10 µF
NC
NC
NC
NC
GND
GND
ALARM
GND
ALARM
+5 V
100 nF
1 µH
100 nF
+5 V
Pins 12, 14 ALARM, ALARM:
These pins provide complemen-
tary differential ALARM and
ALARM outputs. This is the low
light alarm. ALARM goes to a
logic low (3.3 V nominal) state
when the optical power drops
below the threshold level
(insufficient optical power).
The optical power must increase
to a higher level than the level
where the alarm went low before
ALARM will return to a logic
high. This difference is the alarm
hysteresis.
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