IRM5000D
Microline, 115 Kb/s Data Transceiver
Dimensions in inches (mm)
0.353 (8.96)
±.003
(.08)
0.131 (3.33)
±.008
(.20)
0.193 (4.89)
0.078 (1.98)
±.008
(.20)
E
FEATURES
• Compliant with IrDA
Physical Layer Specification 1.3
• SIR Data Rates 2.4 Kb/s to 115 Kb/s
• High EMI Immunity,
Eliminates the Need for Shielding
• Battery & Power Management Features:
– Low standby current - 110
µ
A Typical
– Shutdown - 2 nA Typical
– Independent LED Anode Supply—2.7 V up to
9.0 V DC
– Wide V
CC
Voltage Range 2.4 V to 5.0 V,
operable at 1.8 V at room temperature
– V
CC
Noise Rejection >100 mV
p–p
• Shutdown Tri-States Receiver Output and
Disables TxD Allowing Bus Interfacing
• TxD Echo-Off; RxD is quiet during transmission
• Provides Integrated Protection for Eye Safety
• High Immunity to Fluorescent Light Noise
• High DC Ambient Rejection
• Receiver Latency Less than 100
µ
s
• Microline Packaging
– (H) 2.74 mm x (D) 3.33 mm x (L) 8.96 mm
Applications:
• Ideal for Battery Operated Hand-held Products
• PDAs, PCS Phones, Calculators, Isolated Medical
Instruments, Infrared ID or Key Systems
DESCRIPTION
The Vishay IRM5000D is an IrDA compliant infrared
data transceiver. Unlike the IRM5000C, the IRM5000D
eliminates receiver RxD output signals while transmit-
ting. The RxD pin is quiet during transmission. This fea-
ture is called Echo-Off. The Shut Down (SD) feature
cuts current consumption to typically less than 0.01
µ
A.
The Shut Down (SD) mode disables the transmit input
and tri-states the receiver output. The transmit input is
Document Number: 82589
Revision 05-July-02
D
0.108 (2.74)
±.003
(.08)
0.040 (1.02)
AC coupled, limiting transmit pulse duration to 70
µ
s, preventing transmit-
ter damage. This also provides integrated protection for eye safety.
Absolute Maximum Ratings,
T
A
=25°C (except where noted)
Supply Voltage Range, all states, V
CC
............................... –0.5 to +7.0 V
LED Anode Voltage,
V
CC
=0 to 5.0 V, not transmitting, V
LEDA
.......................... –0.5 to +9.0 V
LED Anode Voltage,
V
CC
=1.5 to 5.0 V, transmitting, V
LEDA
......................–0.5 to V
CC
+4.0 V
Input Current
I
CC
during transmit, V
CC
=5.0 V, TxD=V
CC
(peak) ....................... 20 mA
Output RxD Current ........................................................................ 20 mA
Storage Temperature,
storage or reduced performance, T
S
............................... –25 to +85°C
Ambient Temperature, operating, T
A
................................... –25 to +85°C
Lead Solder Temperature, 240°C .................................................... <10 s
Average IR LED Current, I
LED
....................................................... 100 mA
Repetitive Pulsed IR LED Current,
<10
µ
s, t
on
<20%, LED Anode=3.3 V, I
LED(RP)
......................... 500 mA
Input Voltage: TxD, Shut Down (SD)............................–0.5 to V
CC
+0.5 V
RxD Voltage, ................................................................–0.5 to V
CC
+0.5 V
Table 1. Pin Functions
Pin no.
Function
1
2
3
IR LEDA
TxD
RxD
Pin no.
4
5
6
Function
SD
V
CC
GND
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1
Figure 1. Block Diagram
Differential
Photodiode
Pre
amp
Main
amp
Lowpass
Filter
Receive
Detector
+
-
+
Tri-State
CMOS Buffer
V
CC
500 kΩ
V
CC
V
CC
Pin 5
RxD
Pin 3
Receiver Output
Tri-State
Control
Regulated
Voltage &
Current
Sources
Power Down
SD
Ambient DC
Cancelling
-
Detector
Reference
Receive Ouput
Blanking
Pin 4
AGC
AGC & Signal
Reference
Processor
Tx
Blanking
Tx Input
Buffer
TxD
Pin 2
500
kΩ
GND
Pin 6
Tx In
Switched
current source
V
CC
Transmit
IR LED
Error
amp
LED Anode
Pin 1
Current Limited
Driver
Theory of operation
The IRM5000D Microline Infrared Data Transceiver consists
of a detector photodiode, an IR LED transmitter, an IC con-
taining ambient light suppressor and Automatic Gain control
circuitry (AGC).
The AGC in the IC is to keep the system output constant by
varying the gain to accommodate a wide range of input sig-
nals. It also provides noise immunity in the high noise ambi-
ent environment.
For normal operation of the transmit and receiver modes,
the Shut Down (SD) pin should be held low. It is recom-
mended that this pin be connected to GND if Shut Down
(SD) feature is not used.
In receive mode, the receiver output (RxD) which normally
stays high, will go low for duration of the received pulses. It
is a push-pull CMOS driver capable of driving a standard
CMOS or TTL load. No external pull-up or pull-down resistor
is required.
In transit mode, by asserting the TxD pin above
1
⁄
2
V
CC
will
turn on IR LED transmitter. LED Anode (pin 1) can be con-
nected to V
CC
or an unregulated power supply (not to
exceed V
CC
+ 4.0 V). It is recommended that a series resis-
tor be connected at Pin1 (LED Anode) to reduce the thermal
dissipation and to lower LED current when V
LED
is greater
than 3.3 V.
Table 2. Microline IRM5000D Truth Table
Inputs
SD
High
Low
Outputs
RxD
500 k
Ω
pull-up
High
LED
Off
On
Off
V
CC
2.4 to 5.0 V
2.4 to 5.0 V
2.4 to 5.0 V
2.4 to 5.0 V
TxD
X=don’t
care state
High
Low
Detector
X=don’t
care state
<0.4
µ
W/cm
2
<4.0
µ
W/cm
2
High
Low
Document Number: 82589
Revision 05-July-02
www.vishay.com
2
Electrical Characteristics
Table 3. Basic Operating Parameters,
T
A
=25°C (except where noted)
Parameter
Sym.
Min.
Typ.
Max.
Supported IrDA Data Rate
—
2.4
2.4
—
—
—
—
—
—
—
—
0.01
110
120
1.7
115.2
5.0
Unit
Kb/s
V
V
µA
µA
µA
mA
Conditions
1.63 µs or 3/16 clock period
–25°C to +85°C,
V
CC
to
V
SS
V
CC
Voltage
Maximum LED Anode Voltage
V
CC
V
LEDA
I
CC1
I
CC2
I
CC3
I
CC5
V
CC
+4
1.0
—
—
2.5
V
CC
=2.4 V to 5.0 V
SD=
V
CC
,
V
CC
=2.7 V to 5.0 V
SD=0,
V
CC
=2.7 V no signal
I
CC
Shut Down Current
(Note 1)
I
CC
Standby Current (Average)
I
CC
Receiving Current (Average)
I
CC
Transmitting Current (Average)
V
CC
=2.7, E=40W/m
2
V
CC
=2.7 V to 3.3 V, No LED resistor
V
LED
=3.0 V DC
Table 4. I/O Parameters
Parameter
TxD, SD input capacitance
TxD Input Impedence
TxD, SD Input Threshold
(Note 1)
SD to RxD Tri-State
SD to RxD Enable
RxD Output High
RxD Output High
RxD Output Low
RxD Output Low
RxD Short Circuit
RxD Short Circuit
RxD to
V
CC
Tri-State Imp
RxD Rise/Fall Time
RxD Rise/Fall Time
Sym.
—
—
—
—
—
V
OH
V
OH
V
OL
V
OL
—
—
—
t
r
, t
f
t
r
, t
f
Min.
—
—
0.8
—
—
—
—
—
—
—
—
—
—
—
Typ.
5.0
500
1.4
35
90
4.3
1.7
0.7
0.3
25
4.0
500
35
60
Max.
—
—
2.0
100
200
—
—
—
—
—
—
—
—
—
Unit
pF
k
Ω
V
ns
ns
V
V
V
V
mA
mA
k
Ω
ns
ns
Conditions
V
CC
=2.4 V to 5.0 V
TxD=
V
CC
,
V
CC
=2.4 V to 5.0 V
V
CC
=2.4 V to 5.0 V
V
CC
=2.4 V to 5.0 V
V
CC
=2.4 V to 5.0 V
V
CC
=5.0 V, I
OH
=4.0 mA
V
CC
=2.4 V, I
OH
=1.0 mA
V
CC
=5.0 V, I
OL
=4.0 mA
V
CC
=2.4 V, I
OL
=1.0 mA
V
CC
=5.0 V, RxD=0, RxD=V
CC
V
CC
=2.4 V, RxD=0, RxD=V
CC
SD=
V
CC
,
V
CC
=2.0 V to 5.0 V
V
CC
=5.0 V, Load=15 pF
V
CC
=2.0 V, Load=15 pF
Table 5. Receiver Parameters,
T
A
=25°C
Parameter
Sym.
Supported IrDA Data Rate
Receive 1/2 Angle
Minimum Signal Detect Irradiance
Maximum Signal Detect Irradiance
Maximum Signal Irradiance No detect
Maximum DC Ambient Irradiance 5.0 V
Maximum DC Ambient Irradiance 2.4 V
Transmit Receiver Latency
(Note 2)
Powerup Receiver Latency
Output Pulse Width at RxD
Small Ripple Power Supply Rejection
(Note 3)
Large Ripple Power Supply Rejection
(Note 3)
—
—
E
IH
min
E
E
max
—
—
—
t
L
—
—
—
—
Min.
2.4
15
—
—
—
—
—
—
—
1.0
—
—
Typ.
—
20
2.0
500
—
10
2.5
50
100
1.6
100
200
Max.
115.2
30
4.0
—
0.3
—
—
100
150
3.0
—
—
Unit
Kb/s
degrees
µ
W/cm
2
µW/cm
2
Conditions
1.63 µs with E
e
=4.0
µ
W/cm
2
to 500 mW/cm
2
IrDA
Physical Layer
specification
Bit error Rate=10
–8
, 1.63
µs
pulse
mW/cm
2
Bit error Rate=10
–8
, 1.63
µs
pulse
< 0.1 pulse per second detect, 20 kHz—
200 kHz square wave <100 ns rise/fall
mW/cm
2
V
CC
=5.0 V
mW/cm
2
V
CC
=2.4 V
µs
µs
µs
mV/µs
mV/ms
0 to 3.0 mW/cm
2
DC ambient input
0 to 2.5 mW/cm
2
DC ambient input
1.63µs, 4µW/cm
2
to 500mW/cm
2
input
100 mV
p–p
triangle wave on V
CC
1.0 V
p–p
triangle wave on V
CC
Document Number: 82589
Revision 05-July-02
www.vishay.com
3
Table 6. Transmitter Output
Parameter
Maximum Data Rate
TxD Radiant Intensity
TxD 1/2 Angle
TxD Peak Wavelength
Radiant 50% Pulse Width, TX High/Low
Optical Rise/Fall Time, TX High or Low
Sym.
—
—
—
—
—
—
—
Min.
—
40
15
850
1.51
—
250
Typ.
—
70
20
870
1.61
30
350
Max.
115.2
230
30
900
1.71
600
400
Unit
Kb/s
mW/Sr
degrees
nm
µs
ns
mA
Conditions
TxD pulse width=1.63
µs
5.1
Ω
LED resistor, 5.0 V LED supply
IrDA
Physical Layer
specification 1.3
—
TxD=1.63
µs,
I
LED
=330 mA, V
CC
=5.0 V
TxD=1.63
µs,
V
CC
=5.0 V
TxD=V
CC
, LED anode=3.3 V, V
CC
=5.0 V
I
LED
Limit, TX Standard
Note 1:
For Shut Down (SD) current to fall below 1.0
µA
requires
driving Shut Down (SD) to within 0.5 V of V
CC
to ensure cut-
off of the PMOS transistor of the input CMOS totem pole. In
most applications this is not an issue if Shut Down (SD) is
driven from a CMOS driver supplied from the same voltage
supply.
Note 2:
“Near-far Receiver Latency” is the time required for the
AGC and ambient correction circuits to return to maximum
sensitivity (Far) following reception of a maximum (Near)
signal or a change in ambient. “Transmit Receiver Latency”
is commonly called “Receiver Latency” or “Transmitter Turn-
around Time”.
Note 3:
The receiver V
CC
power supply rejection is significantly bet-
ter for small ripple of less than 100 mV
p-p
than for larger val-
ues. For ripple of more than 100 mV
p-p
,
internal circuits can
maintain operating headroom provided that the slew rate is
significantly slower. Typically, these specifications allow
operation without an external filter from either switching sup-
plies with less than 50 mV
p-p
ripple or unregulated supplies
with less than 1.0 V
p-p
of 120 Hz ripple.
Figure 2. Timing Diagrams
Transmit Mode
5.0 V
SD 0 V
5.0 V
TxD In
0V
Φ
e
LED
Optical SignalOutput
5.0 V
RxD Out 0 V
(Echo-off)
Receive Mode
5.0 V
SD
0V
5.0 V
TxD In
0V
1.6
µs
8.7
µs
Ε
e
Optical Signal
Received 5.0 V
RxD Out
0V
1.6
µs
8.7
µs
Latency
5.0 V
SD
0V
5.0 V
TxD In
RxD Out
0V
5.0 V
0V
100
µs
Document Number: 82589
Revision 05-July-02
www.vishay.com
4
Figure 3. Input Schematics
V
CC
Figure 4. Output Schematics
V
CC
500 kΩ
pull-up
V
CC
TxD
V
CC
V
CC
V
CC
V
CC
V
CC
RxD
Figure 5. Infrared Reflow Soldering Profile
240
220
200
180
160
140
120
100
80
60
40
20
0
0
4874
10 s max.
@ 230°C
Temperature (
°
C )
2°C - 4°C/s
120 s - 180 s
90 s max
2°C - 4°C/s
50
100
150 200 250
Time ( s )
300
350
Interface Diagrams
Figure 6. Super I/O (PC87338VLJ) to IRM5000D
Figure 7. With independent V
LED
power supply
V
CC
Vcc
47 Ohms
V
LED
R
LED
0.1µF
21
V
CC
65
IRTx
22µF
1
R
LED
5
V
CC
0.1µF
22µF
C
3
=0.1
µF
C
4
=22
µF
21
V
CC
IR Tx 65
PC87338VLJ
IR Rx1 67
2
LED
ANODE
TxD
5
V
CC
2 TxD
C1=0.1
µF
C2=22
µF
1
LED
Anode
PC87338VLJ
67
IRRx1
IR SLO
40
68
3
IRM5000D
RxD
IRM5000D
IRMS5000
3 RxD
SD
4
GND
6
GND
SD GND
6
4
IR SLO 68
GND
GND
40
Document Number: 82589
Revision 05-July-02
www.vishay.com
5
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