Features
Applications
L E D / P H O T O I C
Transmitter/receiver photo IC for optical link
For MOST
automotive network, 50 Mbps band POF communications
L8628/S8627
PRELIMINARY DATA
Jan. 2003
L8628 and S8627 are transmitter and receiver photo ICs developed for MOST (Media Oriented System Transport) networks used in vehicles to
communicate multimedia information. The transmitter photo IC L8628 consists of a red LED, driver IC and current regulator chip incorporated into a
clear plastic package and can be set to an operating mode that reduces the optical output level by half. The receiver photo IC S8627 is a monolithic
photo IC fabricated by the PiN-BiP process and features a wide dynamic range. It also has a low power consumption "sleeping mode" and an
optical wakeup mode triggered by input of light. Both the transmitter and receiver photo IC input and output digital signals through a TTL interface.
l DC to 50 Mbps data communications
l TTL input
l Optical output 50 % cut mode
l Vehicle networks (MOST)
l Factory automation networks
l Office machine networks
l Data communications requiring high reliability
due to locations with excessive noise
L8628
S8627
l 4 M to 50 Mbps data communications
l Monolithic structure immune from external noise
l TTL output
l Wide dynamic range
l Sleeping mode with optical wakeup
1
I Absolute maximum ratings (Ta= 25
C
)
Parameter
Symbol
L8628/S8627
Unit
Supply voltage
Vcc
-0.5 to +7.0
V
Operating temperature
Topr
-40 to +85
C
Storage temperature
Tstg
-40 to +100
C
Soldering
Tsol
260 C, 5 s, 3 times, at least 2.5 mm away from lead root
C
I
Electrical and optical characteristics (Ta= -40 to +85 C, Vcc=4.75 to 5.25 V)
Parameter
Symbol
Condition
Min.
Typ.
Max.
Unit
Current consumption
(operation mode)
Icco
*
1,
*
2
-
-
30
mA
Current consumption (sleeping mode)
Iccs
Dark state
-
-
30
A
Receiver level
Popt3
Bi-phase signal
-25
-
-2
dBm
High level output voltage
Voh
Ioh= -150 m
2.5
-
-
V
Low level output voltage
Vol
Iol=1.6 mA
-
-
0.4
V
Rise time
tr
-
-
9
Vout
Fall time
tf
10 to 90 % *
1,
*
2
-
-
7
ns
Pulse width variation
tpwv
*
1,
*
2,
*
3,
*
5
15.5
-
32.7
ns
Pulse width distortion (average value)
tapwd
*
1,
*
2,
*
3,
*
5
0
-
+8
ns
Operation to sleeping mode transition receivable level
Psl
Sleeping mode to operation transition receivable level
Pop
*
1,
*
2,
*
4
-40-
-28
dBm
High level voltage
Vmh
Ioh= -20 A
4.0
-
-
V
Mode
out
Low level voltage
Vml
Iol=0.88 mA
-
-
0.5
V
*1: Measured with input signals conforming to SP3 MOST specification of physical layer rev. 1.0.
*2: Measured with R
L
=50 k9, C
L
=15 pF (including parasitic capacitance such as probe, connector and evaluation circuit board
pattern), and threshold voltage=1.5 V.
*3: An optical input waveform is generated with a Hamamatsu standard transmitter.
*4: Average optical power is measured with a POF (NA=0.5).
*5: Measured with PRBS at 45.2 Mbps (NRZ signal conversion).
Note)
If modulated light at 4 Mbps or less (including DC light and no light input) is input to S8627, the high and low levels cannot
be discerned.
A bypass capacitor (0.1 F) connected between Vcc and GND at a position within 3 mm from the lead, and
a 10 F 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.
S8627
HAMAMATSU PHOTONICS K.K., Solid State Division
1126-1 Ichino-cho, Hamamatsu City, 435-8558 Japan, Telephone: (81) 053-434-3311, Fax: (81) 053-434-5184, 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: (1) 908-231-0960, Fax: (1) 908-231-1218
Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: (49) 08152-3750, Fax: (49) 08152-2658
France: Hamamatsu Photonics France S.A.R.L.: 8, Rue du Saule Trapu, Parc du Moulin de Massy, 91882 Massy Cedex, France, Telephone: 33-(1) 69 53 71 00, Fax: 33-(1) 69 53 71 10
United Kingdom: Hamamatsu Photonics UK Limited: 2 Howard Court, 10 Tewin Road, Welwyn Garden City, Hertfordshire AL7 1BW, United Kingdom, Telephone: (44) 1707-294888, Fax: (44) 1707-325777
North Europe: Hamamatsu Photonics Norden AB: Smidesvgen 12, SE-171 41 Solna, Sweden, Telephone: (46) 8-509-031-00, Fax: (46) 8-509-031-01
Italy: Hamamatsu Photonics Italia S.R.L.: Strada della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: (39) 02-935-81-733, Fax: (39) 02-935-81-741
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. 2003 Hamamatsu Photonics K.K.
Cat. No. KPIC1048E02
Feb. 2003 DN
Transmitter/receiver photo IC for optical link
L8628/S8627
2
IElectrical and optical characteristics (Ta= -40 to +85 C, Vcc= 4.75 to 5.25 V)
Parameter
Symbol
Condition
Min.
Typ.
Max.
Unit
Current consumption
Icc
Vin= 2.0 V, Rcont=13.5 kW
-
-
40
mA
Peak emission wavelength
lp
630
650
670
nm
Spectral half width (FWHM)
Dl
-
20
30
nm
Fiber coupled optical power 1
Po1
Rcont=13.5 kW *
6,
*
7
-8.5
-
-2.5
dBm
Fiber coupled optical power 2
Po2
Rcont=27 kW *
6,
*
7
-11.8
-
-5.2
dBm
Extinction ratio
re
10
-
-
dB
Rise time at pulse drive
tr
20 to 80 % *
6
-
-
6.0
ns
Fall time at pulse drive
tf
80 to 20 % *
6
-
-
6.0
ns
Pulse width variation
tpwv
50 % *
6,
*
8
20.9
-
24.3
ns
Pulse width distortion (average value)
tapwd
50 % *
6,
*
8
-0.5
-
+1.5
ns
*
6: Measured with input signals conforming to SP1 MOST specification of physical layer rev. 1.0.
*7: Average value measured with a plastic fiber (f1 mm, SI-POF, NA=0.5, 1 m) made by Mitsubishi Rayon.
*8: Measured with PRBS at 45.2 Mbps (NRZ signal conversion).
NOTE) A bypass capacitor (0.1 F) connected between Vcc and GND at a position within 3 mm from the lead, and a 10 F
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.
I Dimensional outlines (unit: mm)
L8628
I Mode output waveform
KPICC0085EA
I Output waveform example
Vertical axis: 1 V/div., Horizontal axis: 5 ns/div.
(Ta=25 C, Vcc=5.0 V, Pi= -26 dBm)
tso
tos
Voh
Vmh
Vol
INPUT SIGNAL DATA
OPTICAL INPUT
NO INPUT SIGNAL
MODE OUTPUT
OUTPUT VOLTAGE
OUTPUT DATA
Vml
S8627
2.03
2.94
5.92
(2 ) d = 0.8 0.05
7.2 0.2 (INCLUDING BURR)
8.98 0.2 (INCLUDING BURR)
5.9 0.2
(INCLUDING B
URR)
(18.0)
5.1
2.54
(4 ) 0.5 0.05
2.54
(SPECIFIED AT THE LEAD ROOT)
(SPECIFIED AT THE LEAD ROOT)
2.54
2.45
3.7 0.05
1.07
a'
a
1.27
(4 ) 0.25 0.05
1.50
(2
) 10
(2
) 10
2.85
2.72
1.57
0.97
2.0 DEPTH 0.15 MAX.
0.6
2.92
1.8
1.24
0.2
0.66
(2
) 5
0.05
+ 0.05
a-a' CROSS SECTION
0.23
- 0.03
Pin No.
S8627
Vcc
GND
MODEOUT
Vout
L8628
V
IN
GND
Vcc
Cont
2.03
2.94
5.92
(2 ) d = 0.8 0.05
7.2 0.2 (INCLUDING BURR)
8.98 0.2 (INCLUDING BURR)
5.9 0.2
(INCLUDING B
URR)
(18.0)
5.1
2.54
(4 ) 0.5 0.05
2.54 2.54
2.45
3.7 0.05
1.07
a'
a'
1.27
EMITTING POINT
ACTIVE
AREA
Tolerance unless otherwise
noted: 0.1, 2
R0.3 MAX.
Values in parentheses indicate
reference value.
Lead surface finish: Silver plating
Shaded area indicates burr.
KPICA0046EB
L8628
PDF 
ZIP