TFDU6108
Vishay Semiconductors
Fast Infrared Transceiver Module Family (4 Mbit/s)
for 2.7 V to 5.5 V Operation
Serial Interface Compatible
Description
The TFDU6108 is a infrared transceiver module
compliant to the latest IrDA standard for fast infrared
data communication, supporting IrDA speeds up to
4.0 Mbit/s (FIR), HP-SIR, Sharp ASK and carrier
based remote control modes up to 2 MHz. Integrated
within the transceiver modules are a photo PIN diode,
an infrared emitter (IRED), and a low–power CMOS
control IC to provide a total front–end solution in a
single package.
These FIR transceivers with an integrated serial
interface are also compliant with the IrDA “Serial
Interface Standard for Transceiver Control”. The
transceivers are capable of directly interfacing with a
wide variety of I/O devices which perform the
modulation/ demodulation function. At a minimum, a
V
CC
bypass capacitor is the only external component
required implementing a complete solution. For
limiting the transceiver internal power dissipation one
additional resistor might be necessary.
New Features
The functionality of the device is similar to the
TFDU6102 series. The IrDA compatible serial
interface function is replacing the former programming
method, guaranteeing a perfect IrDA standardized
and compliant programmability. The IRED current is
programmable to different levels, no external current
limiting resistor is necessary.
Features
D
Compliant to the latest IrDA physical layer specifi-
cation (Up to 4 Mbit/s),
HP–SIR
®
, Sharp ASK
®
and TV Remote Control
D
Compliant to the IrDA
“Serial Interface Specification for Transceivers”
D
For 3.0 V and 5.0 V Applications, fully specified
2.7 V to 5.5 V Opreational down to 2.6 V
D
Compliant to all logic levels between 1.5 V and 5 V
D
Low Power Consumption
(typ. 2.0 mA Supply Current)
D
Power Shutdown Mode (<1
mA
Shutdown Current)
D
Surface Mount Package Options
–
Universal (9.7
×
4.7
×
4.0 mm)
–
Side and Top View
D
Tri-State-Receiver Output,
Weak Pull–up when in Shutdown Mode
D
High Efficiency Emitter
D
Baby Face (Universal) Package Capable of
Surface Mount Soldering to Side and Top View
Orientation
D
Directly Interfaces with Controller Devices of any
Logic Level
D
Built–In EMI Protection including GSM bands – No
External Shielding Necessary
D
Few External Components Required
D
Pin to Pin Compatible to Legacy Vishay Telefunken
SIR and FIR Infrared Transceivers
D
Split power supply, transmitter and receiver can be
operated from two power supplies with relaxed
requirements saving costs
Applications
D
Notebook Computers, Desktop PCs,
Palmtop Computers (Win CE, Palm PC), PDAs
D
Digital Still and Video Cameras
D
Printers, Fax Machines, Photocopiers,
Screen Projectors
Document Number 82537
Rev. A1.2, 29-May-02
D
Telecommunication Products
(Cellular Phones, Pagers)
D
Internet TV Boxes, Video Conferencing Systems
D
External Infrared Adapters (Dongles)
D
Medical and Industrial Data Collection Devices
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TFDU6108
Vishay Semiconductors
Pin Description
Pin Number
1
Function
IRED Anode
Description
IRED anode to be externally connected to V
CC2.
This pin is
allowed to be supplied from an uncontrolled power supply
separated from the controlled V
CC1
supply. For V
CC2
> 4 V
a serial resistor R1 for reducing the internal power dissipation
might be used depending on the ambient conditions,
see derating curve.
Transmit Data Input, dynamic loaded for noise suppression.
This input is used to transmit serial data when the device is
enabled. An on–chip protection circuit disables the LED driver
if the Txd pin is asserted for longer than 80
µs
Received Data Output, push-pull CMOS driver output capable
of driving a standard CMOS or TTL load. No external pull-up
or pull-down resistor is required. When disabled it is connected
to V
logic.
by a weak pull–up (500 kΩ)
Pin is current limited for protection against bus collisions by-
programming errors
Serial Clock, dynamically loaded
Supply Voltage
Supply voltage for digital part, 1.5 V to 5.5 V, defines logic
swing for Txd, SCLK, and Rxd
Ground
I
HIGH
I/O Active
2
3
IRED Cathode IRED cathode, internally connected to driver transistor
Txd
4
Rxd
O
LOW
5
6
7
8
SCLK
V
cc
V
logic
GND
I
HIGH
“U” Option BabyFace
(Universal)
IRED
Detector
1
2 3 4 5 6
7 8
Figure 2. Pinnings
Document Number 82537
Rev. A1.2, 29-May-02
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3 (23)
TFDU6108
Vishay Semiconductors
Electrical Characteristics
T
amb
= 25_C, V
CC
= 2.7 V to 5.5 V unless otherwise noted.
Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.
Parameters
Transceiver
Supply Voltage V
CC1
Supply Voltage V
logic
Dynamic Supply Current
Dynamic Supply Current
T = –25°C to 85°C
Dynamic Supply Current
T = –25°C
Dynamic Supply Current
T = –25°C to 85°C idle
Dynamic Supply Current
T = –25°C to 85°C active
Active, no load
E
e
= 0 klx
E
e
= 1 klx
*)
Receive mode,
E
Eo
= 100 mW/m
2
(9.6 kbit/s to 4.0 Mbit/s),
RL = 10 kW to V
logic
= 5 V,
CL = 15 pF
Inactive,
set to Shutdown mode
T = 25°C, E
e
= 0 klx
T = 25°C, E
e
= 1 klx
*)
Shutdown mode,
T = 85°C,
Not Ambient Light Sensitive
Operating Temperature
Range
Output Voltage Low
Output Voltage High
Input Voltage Low
(Txd, SCLK)
Input Voltage High
(Txd, SCLK)
Input Leakage Current
(Txd, SCLK)
Input Leakage Current,
Mode
Input Capacitance
*)
**)
C
load
= 15 pF
V
logic
= 5 V
C
load
= 15 pF
V
logic
= 5 V
CMOS level
**)
CMOS level
**)
I
logic
I
logic
V
CC1
V
logic
2.7
1.5
5.5
5.5
V
V
Test Conditions / Pins
Symbol
Min.
Typ.
Max.
Unit
Receive mode only. In transmit mode, add the averaged programmed
current of IRED current as I
CC2
Active, no signal
E
e
= 0 klx
I
CC1
2.0
2.35
2.3
5
1
mA
mA
µA
mA
Standby Supply Current
I
SD
1
1.5
I
SD
5
µA
µA
µA
T
A
V
OL
V
OH
V
IL
V
IH
I
L
I
L
C
I
–25
0.5
V
logic
–0.5
+85
0.8
°C
V
V
0.15
*)
V
logic
0.9
*)
V
logic
–10
–80
+10
+80
5
V
V
µA
µA
pF
Standard Illuminant A
The typical threshold level is between 0.5 x V
logic/
2 (V
logic
= 3 V) and 0.4 x V
logic
(V
logic
= 5.5 V).With that
the device will work with less tight levels than the specified min/ max values. However, it is recommended
to use the specified min/max values to avoid increased operating/standby supply currents.
Document Number 82537
Rev. A1.2, 29-May-02
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