P H O T O I C
Photo IC for optical link
S8046
Receiver with sleeping mode suitable for 50 Mbps optical link
S8046 is optical communication devices designed for POF (Plastic Optical Fiber) data links. S8046 is a high sensitivity, high-speed
photo IC that receives signals at 50 Mbps and covers a wide dynamic range of 21.5 dB. The output is TTL compatible. S8046 also
features a sleeping mode in which operation automatically switches to low power dissipation mode when no light is input and
switches back to normal operation mode when light is input from the optical fiber. The internal IC checks which mode is currently
selected and this check signal is available from the mode output terminal. Current consumption in sleeping mode is approximately
1/400th that of normal operation mode.
Features
Applications
Sleeping mode (low power dissipation)
4 to 50 Mbps
High-speed data transmission even under poor environmental
conditions with high noise
Monolithic photo IC
High reliability
TTL output
Wide dynamic range
Designed to be used with L8045
ꢀ Absolute m axim um ratings (Ta=25 °C)
Param eter
Supply voltage
Sym bol
Vcc
Vo
Value
-0.5 to +7.0
-0.5 to Vcc+0.5
Unit
V
V
Output voltage
Output current
Io
P
Topr
Tstg
-
10
m A
mW
°C
°C
-
Power dissipation
Operating tem perature
Storage tem perature
Soldering
250 *1
-40 to +85
-40 to +85
230 °C, 5 s, at least 1.8 m m away from package surface
*1: Derate power dissipation at a rate of -1.75 mW /°C above Ta=25 °C
ꢀ Electrical and optical characteristics (Ta=25 °C , Vcc=4.5 to 5.5 V)
Param eter
Sym bol
fD
Condition
bi-phase signal
Min.
4
-
-
-8
-
2.7
-
-
-
-4
-
-
-
-
-
Typ
Max.
50
40
100
-
-28.0
-
0.4
5
5
+8
5
-33
-30
200
500
-
Unit
Mbps
m A
µA
dBm
dBm
V
V
ns
ns
ns
Data rate
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
2, 3
Current consum ption (in operation m ode)
Current consum ption (in sleeping m ode)
Minim um overload
Minim um receiver input power
H level output voltage
Icco
Iccs
Pim ax
Pim in
Voh
Vol
tr
tf
∆t
∆tj
Psl
Pop
tso
tos
Vm h
Vm l
*
Pin= -
∞
2, 3, 5, 6
2, 3, 5, 6
*
*
Ioh= -150 µA *2, 3
Iol=1.6 m A *2, 3
20 to 80 % *2, 3
Output
voltage
L level output voltage
Rise tim e
Fall tim e
2, 3
Pulse width distortion
*
*
*
*
*
*
*
2, 3
Jitter
ns
2, 3, 5
Operation mode to sleeping mode switching input power
Sleeping mode to operation mode switching input power
Sleeping mode to operation mode switching tim e
Operation mode to sleeping mode switching time
dBm
dBm
µs
µs
V
2, 3, 5
2
2
7
Mode
H level voltage
L level voltage
3.0
-
7
output
*
0.5
V
*2: Input is a pseudo-random bi-phase signal at 50 Mbps.
L
*3: C =5 pF (including parasitic capacitance of probes, connectors and PC board)
*4: Optical input signal is generated by our standard signal generator.
*5: Average value (at 50 % duty ratio)
*6: Pe=10-9
*7: “H” in sleeping m ode, “L” in operation m ode
Note)
· A bypass capacitor (0.1 µF) and another capacitor (4.7 µF) are connected between Vcc and GND at a position within 3 m m from
the lead.
· The center of the optical fiber is aligned with the center of the lens on the package. The distance between the fiber end and the
lens is 0.1 m m .
· Output becom es undefined at a baud rate less than 4 Mbps.
1