TOTX1960(F) Toshiba, TOTX1960(F) Datasheet - Page 6

• Manufacturer Part Number: TOTX1960(F)
• Manufacturer: Toshiba

Specifications of TOTX1960(F)

• Lead Free Status / Rohs Status: Supplier Unconfirmed

General-Purpose Optical Modules
Application circuits for the TOTX1950(F) and TORX1950(F), a
pair of transmitting and receiving modules, are shown in the
figure on the right.
The TOTX1950(F) transmission module requires an external
resistor to supply current to the LED. Additionally, it requires a
capacitor as a noise filter.
The TORX1950(F) receiving module requires an
inductor-capacitor noise filter on the Vcc line. The module
case is made of conductive resin to provide a shielding effect
against external noise. Pins #5 and #6 must be connected to
the system ground.
There are also duplex modules in the general-purpose
TOSLINK series; their application circuits are generally the
same as for simplex modules.
All the general-purpose modules have a TTL interface for
easy connection with peripheral digital ICs.
Generally, the width of pulse trains
generated by a receiving module varies
with the input optical power. This is
referred to as pulse width distortion.
The figure at right shows the pulse
width distortion of a replacement and a
predecessor module, the TODX2950(F)
and TODX295A(F).
The replacement module provides a
stable performance over a wider range
of input optical power.
Toshiba offers several TOSLINK modules housed in ceramic packages
that have higher reliability than plastic molded packages.
In ceramic packages, devices are mounted on a ceramic substrate and
hermetically sealed in metal shells.
Ceramic packages provide superior moisture resistance and also reduce
the stress put on the internal LED, leading to longer life.
Connecting general-purpose optical modules
Typical pulse width performance of general-purpose optical modules
General-purpose optical modules in ceramic packages
–10
–20
–30
30
20
10
0
–30
Ta = 25˚C, Vcc = 5.0 V
10 Mb/s, 50% duty cycle
APF cable
–28
6
–26
Application circuits for the TOTX1950(F) and TORX1950(F)
Soldered to
PC board
–24
Typical Pulse Width Distortion
5
Fiber-optic connector
Input
transmitting module
Input Optical Power (dBm)
(Bottom view)
4
TOTX1950(F)
–22
insertion side
V
Optical
3
Metal shell
Optical receiving module in a ceramic package
CC
5.6 k
2
–20
Glass window
Transmitting IC
GND
Soldered to
PC board
1
0.1 F
TODX295A(F)
6
–18
GND
–16
LED
Capacitors
5
–14
Fiber-optic connector
PIN-PD
GND
Receiving IC
TORX1950(F)
receiving module
4
TODX2950(F)
(Bottom view)
insertion side
V
Optical
3
0.1 F
CC
–12
47 H
Ceramic substrate
2
Output
Lead
1
–10
Bonding pads
6
GND
–8