S7726 is designed for high-speed POF (Plastic Optical Fiber) communications. Both devices are molded into miniature plastic packages with

lenses, allowing easy and efficient coupling to a POF. S7727 uses a monolithic photo IC that ensures high resistance to external noise and high

reliability, and provides P-ECL voltage conversion output.

PHOTO

IC

Photo IC for optical link

Receiver for 156 Mbps POF communications

S7727

Features

l Photo IC receiver for POF data link

l Monolithic structure immune from external noise

l Data rates from 4 Mbps to 156 Mbps

l P-ECL voltage conversion output

(Note: Unlike normal P-ECL output, S7727 output

cannot be terminated with 50

9.)

l Designed to be used with L9534 or L7726

Applications

l Plastic optical fiber communications (FA, office machine,

home automation, LAN)

l Data transmission in locations subject to high

electromagnetic noise

1

s Absolute maximum ratings (Ta=25

°C)

Parameter

Symbol

Value

Unit

Supply voltage

Vcc

-0.5 to +7.0

V

Output voltage

Vo

-0.5 to Vcc + 0.5

V

Output current

Io

8

mA

Power dissipation

Pmax

250 *

1

mW

Operating temperature

Topr

-20 to +70

°C

Storage temperature

Tstg

-40 to +85

°C

Soldering

-

230 °C, 5 s, at least 1.5 mm away from package surface

-

*1: Derate power dissipation at a rate of 1.7 mW/°C above Ta=25 °C

s Electrical and optical characteristics (Ta=25

°C, Vcc=5.0 V)

Parameter

Symbol

Condition

Min.

Typ.

Max.

Unit

Data rate

fD

Bi-phase signal

NRZ conversion

4

-

156

Mbps

Current consumption

Icc

*

-

-

40

mA

High level output voltage

Voh

Ioh= -1 mA *

3.9

-

4.3

V

Low level output voltage

Vol

Iol= -0.5 µA *

2.9

-

3.4

V

Minimum overload

Pimax

*

-2

-

-

dBm

Minimum receiver input power

Pimin

*

-

-

-22

dBm

Rise time

tr

-

-

3

ns

Fall time

tf

10 to 90 % *

-

-

3

ns

Pulse width distortion

-3

-

3

ns

Jitter

∆tj

*

-

-

3

ns

*2: Measured with 156 Mbps input signal (Bi-phase signal)

*3: A 3 pF capacitor is connected to GND as a capacitive load (including parasitic capacitance such as probes, connectors and

evaluation PCB patterns)

*4: An optical input waveform is generated with a Hamamatsu standard transmitter.

*5: A detectable signal level is an average value, measured using a plastic fiber (GH4001 made by Mitsubishi Rayon).

*6: A 3 k

Ω resistor is externally connected between Q and GND and also between QB and GND.

Note)

q A bypass capacitor (0.1 µF) connected at a position within 2 mm from the lead, and a 4.7 µF capacitor is also connected to the

power supply line nearby.

q The optical axis of the package lens is exactly aligned with the center axis of the optical plug, and the gap between the lens surface

and the optical reference plane of the plug is 0.1 mm.

q If modulated light at 4 Mbps or less (including DC light and no light input) is input to S7727, the high and low levels cannot be

discerned.