HAMAMATSU L7726, L7727 Datasheet

LED/PHOTO IC

Red LED/Photo IC for optical link

L7726/S7727

Emitter/receiver for 156 Mbps POF communications

L7726 and S7726 are 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.

Features Applications

l

L7726

l

Red LED for POF data link

l

650 nm emission suitable for POF communications

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High-speed response: fc=100 MHz Typ.

l

High output power: Po= -1.5 dBm (I

F

=30 mA, φ1 mm, POF)

S7727

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Photo IC receiver for POF data link

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Monolithic structure immune from external noise

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Data rates from 4 Mbps to 156 Mbps

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P-ECL voltage conversion output
(Note: Unlike normal P-ECL output, S7727 output
cannot be terminated with 50 W.)

Plastic optical fiber communications (FA, office machine,
home automation, LAN)

l

Data transmission in locations subject to high
electromagnetic noise

L7726

Absolute maximum ratings (Ta=25 °C)

■

Parameter Symbol Value Unit

Forward current I
Power dissipation Pmax 250
Operating temperature Topr 0 to 60 °C
Storage temperature Ts tg -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

Electrical and optical characteristics (Ta=25 °C)

■

Parameter Symbol Condition Min. Typ. Max. Unit

Forward voltage V
Peak emission wavelength
Spectral half width (FWHM)
Fiber coupled optical power Po I.=30 mA
Cut-off frequency fc I.=30 mA - 100 - MHz

*2: Measured using a 1-meter long optical fiber (MH4001 made by Mitsubishi Rayon).

lp
Dl

.

I.=30 mA - 2.3 - V

.

I.=30 mA 640 650 660 nm
I.=30 mA - 10 - nm

*2

50 mA

*1

- -1.5 - dBm

mW

Red LED/Photo IC for optical link

L7726/S7727

S7727

■ 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

*3

mW
Operating temperature Topr -20 to +70 °C
Storage temperature Ts tg -40 to +85 °C
Soldering - 230 °C, 5 s, at least 1.5 mm away from package surface -

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

■ Electrical and optical characteristics (Ta=25 °C, Vcc=5.0 V)

Parameter Symbol Condition Min. Typ. Max. Unit

Data rate fD

Current consumption Icc
High level output voltage Voh Ioh= -1 mA
Low level output voltage Vol
Minimum overload Pimax
Minimum receiver input power Pimin
Rise time tr - - 3 ns
Fall time tf
Pulse width distortion
Jitter

DT
Dtj

Bi-phase signal
NRZ conversion

*4, *5, *8

*4, *5, *8

Iol= -0.5 mA

*4, *5, *6, *7, *8

*4, *5, *6, *7, *8

10 to 90 %

*4, *5, *6, *8

*4, *5, *6, *8

*4, *5, *8

*4, *5, *8

*4: Measured with 156 Mbps input signal (Bi-phase signal)
*5: A 3 pF capacitor is connected to GND as a capacitive load (including parasitic capacitance such as probes, connectors and

evaluation PCB patterns)
*6: An optical input waveform is generated with a Hamamatsu standard transmitter.
*7: A detectable signal level is an average value, measured using a plastic fiber (MH4001 made by Mitsubishi Rayon).
*8: A 3 kW resistor is externally connected between Q and GND and also between QB and GND.

Note)

■ Dimensional outline (unit: mm)

● 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.

● 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.

● 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.

4 - 156 Mbps

- - 40 mA

3.9 - 4.3 V

2.9 - 3.4 V

-2 - - dBm

- - -22 dBm

- - 3 ns

-3 - 3 ns

- - 3 ns

5.2 ± 0.3

(INCLUDING BURR)

5.0

1.4

4.3

4.5 ± 0.3

(2.15)

(INCLUDING BURR)

0.5

(1.5)

0.4

5.7 ± 0.4

1.77

0.97

0.69

10˚

1.8

(0.9)

0.25

10˚

4.3

1.27

1.27 1.27

(SPECIFIED AT THE LEAD ROOT)

(0.9)

10˚

10˚

Information furnished by HAMAMATSU is believed to be reliable. However, no responsibility is assumed for possible inaccuracies or omissions.
Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein. ©2002 Hamamatsu Photonics K.K.

(0.9)

Tolerance unless otherwise

5.0

noted: ±0.1, ±2˚
Shaded area indicates burr.

Values in parentheses indicate
reference value.

L7726PIN No. S7727

CATHODE

CATHODE

ANODE

CATHODE

QB

GND

Q

Vcc

HAMAMATSU PHOTONICS K.K., Solid State Division
1126-1 Ichino-cho, Hamamatsu City, 435-8558 Japan, Telephone: [phone], Fax: [phone], http://www.hamamatsu.com

U.S.A.: Hamamatsu Corporation: 360 Foothill Road, P.O.Box 6910, Bridgewater, N.J. 08807-0910, U.S.A., Telephone: [phone], Fax: [phone]
Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: [phone], Fax: [phone]
France: Hamamatsu Photonics France S.A.R.L.: 8, Rue du Saule Trapu, Parc du Moulin de Massy, 91882 Massy Cedex, France, Telephone: [phone], Fax: [phone]
United Kingdom: Hamamatsu Photonics UK Limited: 2 Howard Court, 10 Tewin Road, Welwyn Garden City, Hertfordshire AL7 1BW, United Kingdom, Telephone: [phone], Fax: [phone]
North Europe: Hamamatsu Photonics Norden AB: Smidesvägen 12, SE-171 41 Solna, Sweden, Telephone: [phone], Fax: [phone]
Italy: Hamamatsu Photonics Italia S.R.L.: Strada della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: [phone], Fax: [phone]

KPICA0029EA

Cat. No. KPIC1034E01
Aug. 2002 DN