TFDT4000
Edition January 7, 1996
Integrated Transceiver
Description
The
TFDT4000
is an infrared transceiver for data communication systems. The
transceiver is compatible to the IRDA standard and allows data rates up to 115 kbit/sAn
internal AGC (Automatic Gain Control) ensures proper operation under EMI conditions.
The internal IRED driver can be connected by the external current control resistor to an
independent unregulated power supply. This will add more freedom in circuit design and
efficient serial drive capability for external IREDs for high power applications.
Features:
Compatible to IRDA standard
SMD top view and through hole side view
Wide supply voltage range (2.7V...5.5V)
Low Profile (height = 5.6 mm max.)
Microcomputer compatible
Fewest external components
Low power consumption
AGC for EMI immunity
Open collector IRED driver
Package:
Pins, see pg. 7:
1: IRED Anode
2: IRED Cathode
3: Txd (Input)
4: Rxd (Output)
5: NC
6: V
CC
(Supply Voltage)
7: SC (Sensitivity Control)
8: Ground
2 stand off pins internally connected to ground.
Block Diagram
Vcc
6
Driver
Amplifier
Comparator
Rxd 4
1
7 SC
AGC
logic
3 Txd
Open Collector
Driver
8 GND
1
2
TFDT4000
Edition January 7, 1996
Absolute maximum ratings
Reference Point Pin 8, unless otherwise noted.
Parameter
Supply Voltage Range
Voltage Range of IRED pin 1,
Drive Output
Txd "LOW"
Input Currents
all pins
except 1, 8, see
IRED current
Test Conditions
Symbol
V
cc
MIN
- 0.5
- 0.5
TYP
MAX
6
6
10
Unit
V
V
mA
Remark
Output Sinking Current
Power Dissipation
Junction Temperature
Ambient Temperature
Range (Operating)
Storage temperature
range
Soldering temperature
Average IRED current
Rep. pulsed IRED
current
Peak IRED current
IRED Anode Voltage
Transmitter Data Input
Voltage
Receiver Data Output
Voltage
t= 20 s @215°C
IIRED(DC)
IIRED(RP)
IIRED(PK)
VIREDA
VTxd
VRxd
- 0.5
- 0.5
- 0.5
Ptot
TJ
Tamb
Tstg
0
- 25
215
25
200
125
70
85
230
100
500
1
V
cc
+0.5
V
cc
+0.5
V
cc
+0.5
mA
mW
°C
°C
°C
°C
mA
mA
A
V
V
V
<90µs, t on<20%
<2µs, ton<10%
s. TEMIC IrDA Design
Guide
s. derating curve, pg. 8
2