TFBS4650-TR4 VISHAY [Vishay Siliconix], TFBS4650-TR4 Datasheet - Page 2

• Manufacturer Part Number: TFBS4650-TR4
• Description: Infrared Transceiver 9.6 kbit/s to 115.2 kbit/s (SIR)
• Manufacturer: VISHAY [Vishay Siliconix]

Functional Block Diagram
Pin Description
Pinout
TFBS4650, bottom view
weight 0.05 g
Document Number 84672
Rev. 1.2, 28-May-08
Pin number
1
2
3
4
5
6
7
Function
IREDC
IREDA
GND
RXD
TXD
V
SD
CC
TXD
SD
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19283
the rising edge of the optical input signal. Output is a CMOS tri-state driver,
which swings between ground and V
Receiver output. Normally high, goes low for a defined pulse duration with
transmitter, and un-tri-states the receiver output. It must be driven high for
IRED anode, connected via a current limiting resistor to V
Power supply, 2.4 V to 3.6 V. This pin provides power for the receiver and
Transmitter data input. Setting this input above the threshold turns on the
This input switches the IRED with the maximum transmit pulse width of
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Shut down. Logic low at this input enables the receiver, enables the
PD
transmitter drive section. Connect V
IRED cathode, do not connect for standard operation
ASIC
Amplifier
unregulated power supply can be used.
shutting down the transceiver.
Comparator
19284
Control
about 50 µs.
Mode
Description
transmitter.
GND
Ground
V
CC
cc
. Receiver echoes transmitter output.
CC1
IRED Driver
via an optional filter.
Tri-State
Driver
CC2
. A separate
IREDA
IRED
IREDC
Vishay Semiconductors
RXD
I/O
O
I
I
TFBS4650
www.vishay.com
Active
High
High
Low
2