IRM1021
1.15 Mb/s Infrared Data Transceiver
Preliminary
Dimensions in inches (mm)
C
L
0.177
(4.50)
Plastic
PCB
Pin 1
0.378 (9.60)
0.158
(4.00)
FEATURES
Pin 1
• Fully Compliant with IrDA Specification
• IrDA Data Rates 9.6 Kb/s to 1.152 Mb/s
• High Immunity to Fluorescent Light Noise
• Battery & Power Management Features:
Absolute Maximum Ratings, T =25°C (except where noted)
Supply Voltage Range, all states, V ................................–0.5 to +7.0 V
A
– Receive – 1.8 mA Typical
CC
– Shutdown – 10 nA Typical
– Independent LED Anode Supply – up to
9.0 V DC
LED Anode Voltage,
V
=0 to 5.5 V, not transmitting, V
LED Anode Voltage,
=2.4 to 5.5 V, transmitting, V
..........................–0.5 to +9.0 V
CC
LEDA
– Wide Operating Voltage Range 2.4 V to 5.5 V
V
..................... –0.5 to V +4.0 V
CC
Input Current,
during transmit, V =5.0 V, TxD=V (peak).......................20 mA
Output RxD Current ........................................................................50 mA
Storage Temperature,
CC
LEDA
– High V Noise Rejection >100 mV
CC
P–P
• Shutdown Tri-States Receiver Output and
Disables TxD allowing Bus Interfacing
I
CC
CC
CC
• Integrated Protection for Eye Safety—
AC Coupled Transmit Input
storage or reduced performance, T .............................–40 to +100°C
S
Ambient Temperature, operating, T ..................................... –25 to 85°C
• High DC Ambient Rejection—Operates Outdoors
A
Lead Solder Temperature, 230°C .................................................... <10 s
• Receiver Latency Less <100 µs
• Slimline Package:
H 4.0 mm x D 4.5 mm x L 9.6 mm
IC Junction Temperature, T ........................................................... 125°C
J
Average IR LED Current, LED Anode=3.3 V, I
Repetitive Pulsed IR LED Current,
........................100 mA
LED
<10 µs, t <20%, LED Anode=3.3 V, I
..........................600 mA
on
LED(RP)
DESCRIPTION
Input Voltage: TxD, SD................................................. –0.5 to V +0.5 V
CC
IRM1021 is an IrDA compliant 1.152 Mb/s infrared
data transceiver. The IRM1021 consists of a PIN pho-
todiode, an infrared LED and a custom ASIC, all
attached to a printed circuit board. Its external shut-
down (SD) feature cuts the current consumption to
less that 0.01 µA . The transmit pulse is limited to
70µs, extending transmitter life and ensuring eye
safety. The flat top surface is ideal for high speed
pick-and-place manufacturing.
RxD Voltage ................................................................ –0.5 to V +0.5 V
CC
Table 1. Pin Functions
Pin no.
Function
IR LEDA
IR LEDC
TxD
Pin no.
Function
1
2
3
4
5
6
7
8
SD
V
CC
GND
GND
RxD
Document Number: 82580
Revision: 17-August-01
www.vishay.com
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