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Part: IRMS6452
Category:
Description: 4 Mb/s Infrared Data Transceiver (Side View/top View)
Company: Vishay Intertechnology
Datasheet: Download IRMS6452 datasheet File size : 52 kB
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Datasheet text preview:
SIDE VIEW IRMS6452/TOP VIEW IRMT6452 4 Mb/s Infrared Data Transceiver
Preliminary
Dimensions in inches (mm)
C (.116 L (.106 2.95) 2.70)
E D
(.157 4.00)
(.190 4.83) PIN 1
PIN 1 E=Emitter
.138 (3.50) .374 (9.86)
D=Detector
IRMS6452
IRMT6452
Absolute Maximum Ratings, TA=25°C (except where noted) Supply Voltage Range, all states, VCC ....... 0.5 to +5.5 V Storage Temperature, TSTG ....... 25 to +85°C Ambient Temperature, operating, TA .. 25 to +75°C Lead Solder Temperature, .... 240°C<10 s IC Junction Temperature, TJ ...125°C Average IR LED Current, DC, ILED ..... 100 mA Repetitive Pulsed IR LED Current, <90 µs, ton <25%, ILED(RP)...... 710 mA Transmit Data Input Voltage, VTxD ...... 0.5 to VCC + 0.5 V Receive Data Output Voltage, VRxD ... 0.5 to VCC + 0.5 V
Pin Number 1 2 3 4 5 6 7 8 Symbol LEDA LEDC TxD RxD SD/ Mode VCC NC GND Description LED Anode LED Cathode Transmit Data Receive Data Shutdown/ Mode Select Positive Supply (Power) GND Ground
Features · IrDA, HP-SIR, Local Talk and Sharp ASK · Ultracompact package: · H 4.0 mm x D 4.8 mm x L 9.8 mm · Data rates from 9.6 Kbit/s to 4 Mbit/s · Supply voltage 2.7 V to 5.25 V · Power Shutdown mode (<100 nA) · Low power consumption 1.7 mA (typ) @ 2.7 V 3.2 mA (typ) @ 5.0 V · Zero external resistors required Description Responding to the volumetric constraints of today's ultra-compact and power conscious portable products, Vishay has developed the next generation in infrared wireless communication transceivers. The transceiver has been designed to support up to 4 Mbit/s IrDA, HP-SIR, Local Talk and Sharp ASK modes. The device combines an LED, photodiode, LED driver and a fully differential receiver into a single integrated package.
Document Number: 82579 Revision 05-July-02
www.vishay.com
1
Table 1. Input/Output Functional Description
Symbol RxD I/O Type Output Polarity Active Low Function This output indicates received serial data. 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. This output may switch indeterminately when the module is transmitting. This output pin is in tri-state mode when the module is in shutdown mode and during digital serial programming operations. RxD is high at initializaton. This CMOS input is used to transmit serial data when SD/ Mode is low. An on-chip protection circuit disables the LED driver if the TxDpin is asserted for longer than 60 µs. When used in conjunction with the SD/ Mode pin. TxD is low at initializaton. Assertion of this pin high for a period of time exceeding 400 µs places the module into shutdown mode. On the falling edge of this signal, the state of the TxDpin is sampled and used to set receiver low bandwidth (TxD= Low) or high bandwidth (TxD= High) mode. See Figures 7 and 8 for timings. SD is low at initializaton Connect to positive power supply (2.7 V to 5.25 V). Placement of a 1.0 µF to 10.0 µF decoupling ceramic capacitor as close as possible to the V CC pin is recommended. Connect to power supply ground. A solid ground plane is recommended. This pin could be connected to ground. This pin can be connected directly to VCC. No series resistor is required. LED cathode. Leave this pin unconnected. This pin may be monitored to determine the state of the LED.
TxD
Input
Active High Active High
SD/ Mode Input
VCC
GND NC LEDA LEDC
Positive Supply Ground (Power) No Connect Input Output
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Figure 1. Block Diagram
VCC
Figure 2. Minimum Vishay Low-Power Integrated Infrared Transceiver Circuit Diagram
VCC
C1= 1 µF to 10 µF
Amp
Comp
Driver
RxD VCC LEDA
IR Controller
IRTX GPO
VCC LEDA LEDC NC TxD
SD/Mode TxD
Mode & Power Control
IRMS6452
SD/ Mode RxD
Driver
LEDC
IRRX GND
GND
Table 2. Recommended Operating Conditions
Symbol VCC TA Parameter Supply Voltage Ambient Operating Temperature Min 2.7 -25 Typical Max 5.25 75 Unit V °C Conditions
Table 3. DC Electrical Characteristics
Symbol ICC ICC ISD Parameter Supply Current; Listening Supply Current; Receiving Supply Current; Shutdown Min 2.0 Typical 3.2 3.8 50 Max 4.5 15 100 Unit mA mA nA Conditions Typical value obtained at Vcc=5 V Interface and optical input power dependent VSD=VCC
Table 4. Receiver DC Electrical Characteristics
Symbol VOL IOL VOH IOH RL CL Parameter RxD Output Low Voltage Static Sink Current on RxD RxD Output High Voltage Static Source Current on RxD RxD Rosistive Load RxD Capacitive Load 2.2 50 Vcc-0.5 2.4 Min Typical Max 0.5 2.4 Unit V mA V mA k pF
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Conditions 2.2K load. 2.2K load.
Document Number: 82579 Revision 05-July-02
Table 5. Transmitter DC Electrical Characteristics
Symbol VIL VIH Ci Parameter TxD Input Voltage Low TxD Input Voltage High Input Capacitance 2.4 5 Min Typical Max 0.8 Unit V V pF Conditions
Table 6. SD/Mode DC Electrical Characteristics
Symbol VIL VIH Ci Parameter SD/ Mode Input Voltage Low SD/ Mode Input Voltage High Input Capacitance 2.4 5 Min Typical Max 0.8 Unit V V pF Conditions
Table 7. Optical Characteristics
Symbol Emin Emin Emin tr,tf txpw txpw txpw Ie aÅ p Parameter Minimum Detection Irradiance 9.6-115.2 kbit/s, SIR Minimum Detection Irradiance 1.152Mbit/s, MIR Minimum Detection Irradiance 4 Mbit/s, FIR LED Optical Rise/Fall Time SIR Optical Pulse Width MIR Optical Pulse Width FIR Optical Pulse Width Output Radiant Intensity Output Radiant Half Intensity Angle Peak Wavelength Optical Overshoot 1.41 147 115 110 ±15 850 870 900 25 200 Min Typical 3.7 4 7.9 9 40 22.13 261 140 400 Max 4 Unit µW/ cm2 µW/ cm2 µW/ cm2 ns µs ns ns mW/sr ° nm % TxD Input Pulse Width = 3/16 duty cycle TxD Input Pulse Width = 217ns TxD Input Pulse Width = 125ns TxD=High, SD/Mode=Low, VCC=3.3 V, = ±15°, TA=25°C, TX@2MHz and 25% Conditions 9.6 kbit/s to 115.2 kbit/s 1.152 Mbit/s 4 Mbit/s
Table 8. AC Electrical Characteristics
Symbol tr tf tSU,tH tw tw tw tw tL tRxDEN tLEDP ILED ILED Parameter RxD Rise Time RxD Fall Time TxDSetup and Hold to SD/ Mode Falling Edge RxD Pulse Width (SIR) RxD Pulse Width (4Mbit/s, single pulse) RxD Pulse Width (4Mbit/s, double pulse) Receiver Latency RxD Valid After Shutdown LED Protection Time-out Peak Transmit Current Average Transmit Current 10 5 10 1.0 80 210 2.1 600 165 290 100 200 100 710 150 Min Typical Max 60 50 Unit ns ns ns µs ns ns ns µs µs µs mA mA 25% duty cycle 25% duty cycle Conditions RL=2.2 K, CL=50 pF RL=2.2 K, CL=50 pF
RxD Pulse Width (1.152Mbit/s) 100
Document Number: 82579 Revision 05-July-02
www.vishay.com
3
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