TFBS4652 Vishay, TFBS4652 Datasheet - Page 2

• Manufacturer Part Number: TFBS4652
• Description: Infrared Transceiver 9.6 Kbit/s To 115.2 Kbit/s Sir
• Manufacturer: Vishay

TFBS4652
Vishay Semiconductors
Functional Block Diagram
Pin Description
Pinout
TFBS4652, bottom view
weight 0.05 g
www.vishay.com
132
Pin Number
1
2
3
4
5
6
7
Function
IREDA
V
RXD
GND
TXD
V
SD
logic
CC
Receiver Output. Normally high, goes low for a defined pulse duration with
the rising edge of the optical input signal. Output is a CMOS tri-state driver,
transmitter, and un-tri-states the receiver output. It must be driven high for
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
IRED Anode, connected via a current limiting resistor to V
This input switches the IRED with the maximum transmit pulse width of
which swings between ground and V
Shut Down. Logic Low at this input enables the receiver, enables the
Reference for the logic swing of the output and the input logic levels.
TXD
SD
19288
transmitter drive section. Connect V
PD
unregulated power supply can be used.
ASIC
Amplifier
19284
shutting down the transceiver.
about 50 µs.
Description
transmitter.
Comparator
Ground
output.
Control
Mode
GND
V
CC
logic.
Definitions:
In the Vishay transceiver data sheets the following nomenclature is
used for defining the IrDA operating modes:
SIR: 2.4 kbit/s to 115.2 kbit/s, equivalent to the basic serial infrared
standard with the physical layer version IrPhY 1.0
MIR: 576 kbit/s to 1152 kbit/s
FIR: 4 Mbit/s
VFIR: 16 Mbit/s
MIR and FIR were implemented with IrPhY 1.1, followed by IrPhY
1.2, adding the SIR Low Power Standard. IrPhY 1.3 extended the
Low Power Option to MIR and FIR and VFIR was added with IrPhY
1.4. A new version of the standard in any case obsoletes the former
version.
cc1
Receiver echoes transmitter
via an optional filter.
V
IRED Driver
log
Tri-State
Driver
cc2
. A separate
IREDA
IRED
RXD
Document Number 84671
I/O
O
I
I
I
Rev. 1.1, 03-Jul-06
Active
HIGH
HIGH
LOW