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115.2 kbps infrared transceiver module
INTRODUCTION: The MS3201 from Novalog is an IrDA 1.0 and 1.2 compliant 115.2 kbps infrared transceiver module ideal for power sensitive personal data transfer applications. Setting a new industry benchmark the MS3201 will operate with the widest available supply voltage range, 1.5V to 5.5V. The MS3201 is also compliant with Sharp ASK/DASK and Consumer IR (TV Remote) specifications. The MS3201 integrates an analog receiver, on-chip LED driver, IR photodiode, IR LED transmitter, and voltage filtering capacitor, Figure 1. Only one external current limiting resistor is required. This external resistor should be selected to optimize transmit distance and system power consumption. An external metal shield is utilized on the MS3201 for high EMI environments.
Pin for Agil pin com redu ient H p SDL- atible w ced 3 pow i er c 201 wit th ons h ump tion .
MS3201
APPLICATIONS: * * * * * * * * * * * * * Personal Digital Assistants (PDAs) Cellular Phones Pagers Financial Messaging (IrFM) Vending Machines Portable printers Digital Cameras Electronic Books Notebook computers MP3 players Storage peripherals Electronic identification Personal data transfer devices
The MS3201 is optically compatible with Novalogs MiniSIR family but utilizing an alternative pin out for existing or new applications. The new 8 pin footprint adds a separate pin for analog ground.
FEATURES: * * * * * * * IrDA 1.4 compliant. Compatible with IrFM specification. 0 to 30 cm transmit range. Data transfer rates from 9600 bps to 115.2 kbps. Evaluation board available to facilitate prototyping. Widest operating voltage range available in compliant transceiver, 1.5V to 3.6V. Ultra low operating power consumption: Shutdown Current (max) 0.2A Receiver Current (max) 160 A Full industrial temperature range, -25C to +85C. Only one external resistor required. Ultra-low system receiver latency. IRRX output disabled during transmit. Separate pin to drive anode of IR LED transmitter. Supplied on Tape & Reel for automated assembly. Meets all European Eye Safety levels.
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Figure 1
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* * * * * * *
Typical Application:
Transmitter Supply may be tied to VDD R1 2.7 1% 8 5 Anode SD
VDD
3 VDD
Motorola DragonBall MC68328
O 26
TXD
7
MS3201 XCVR IRTX
RXD
25
6
IRRX NC 2 Vssa Vss 4 1
Pin Description:
Pin 1 2 3 4 5 6 7 8 Mnemonic VSS NC VDD VSSA SD IRRX IRTX Anode Function Ground No Connection Supply Voltage Analog Ground Shutdown IR Receiver Output IR Transmitter Input Transmitter LED Anode I/O I O I I O I I Active High Low High -
Absolute Maximum Ratings:
Voltage, Any Input ..................................................................... -0.3V to +6.0V Operating Temperature Range ...................................................-25C to +85C Storage Temperature Range .......................................................-30C to +90C
Stress beyond `Absolute Maximum Ratings' may cause damage to the device. These are stress ratings only, no operation beyond operating specifications is implied. Exposure to any absolute maximum condition for extended periods may permanently affect device reliability.
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Package Dimensions:

Notes: Units: mm Tolerance: 0.2mm Coplanarity: 0.1 mm Max.
Recommended PCB Pad Layout:

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AC Timing:
Shutdown Receive Transmit
SD
RX Light TSD IRRX IRTX TR TX Light TD TR TR TD
Device Operation:
The operating mode of the transceiver is controlled by the SD (shutdown) input and the state of the transmitter input. The device is enabled whenever the SD input is a logic low. If the SD input is high IRTX is opened and the IRRX output is tri-stated and the device is said to be shutdown. If the SD input is low half duplex operation is enabled. Care must be taken to ensure that the transmitter input is low when not transmitting (idle), this enables the receiver. Table 1 summarizes the operating modes. Once the transmit input is toggled (or from the last bit transmitted) the receiver is not active for the recovery time, TR. The receive data output may be valid after the recovery time provided there is received light. The MS3201s transmitter LED (IrLED) radiant intensity is proportional to the forward current (IF) through IrLED. System power consumption can be optimized for each application by selection of an appropriate external current limiting resistor. Transmit distance may be approximated using the following equation; D (meters) = (IF(amps)/0.3) Current limiting resistors should be 2% tolerance, non inductive (not wire wound) type.
Table 1:
SD input 0 0 1
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IRTX input 0 Toggling x
IrLED Off Toggling Off
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Receiver Enabled Disabled, for TR min Shutdown
IRRX Output Valid Data Tri-State Tri-State
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MS3201 Electrical and Optical Characteristics
Device Specifications:
Symbol Parameter Conditions No received data, transmitter off @3.0V, T=25C IDD Supply Current ISD Shutdown Current SD=Logic High VDD Supply Voltage Min. Typical 90 0.001 Max. 160 0.2 3.6 Max. VDD+0.5 0.2 VDD 0.4 +1.0 +1.0 100.0 Typical Max. 200 200 2.5 400 1.8 150 50 Max. 100 0.3 Units S S nS S nS S S S Units mW/sr mW/sr nS nm nm % Units W/cm2 W/cm2 W/cm2
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1.5 Min. Typical 0.6 VDD -0.5 1.5 -1.0 -1.0 4.0 Min.
Units A A V Units A A V
Digital Input/Output:
Symbol VIH VIL VOH VOL IOL IIL II Symbol TR TSD TR/TF TW TJ TD TW(max) TL Symbol Parameter Input High Input Low Output High Output Low Output Leakage Input Leakage Input Current Parameter Recovery Delay Shutdown Delay Rise & Fall Time Pulse Width Pulse Jitter Pulse Delay Max. Pulse Width Receiver Latency Conditions IRTX, SD inputs IRTX and SD inputs IRRX = -250 A @ 2.5V IRRX = 0.3 mA SD = Logic High SD, IRTX = Logic Low IRTX = High, SD = Low Conditions from Shutdown to Full Sensitivity IRRX output, VDD = 1.5 to 5.5V IRRX output IRRX output IRRX output IRTX=Logic 1>200S
AC Parameters:
100 1.0
18 17
Transmitter:
Parameter Radiant Intensity Radiant Intensity Half Instensity Angle Optical Rise/Fall Time Peak Wavelength Optical Bandwidth Optical Overshoot Conditions LED peak IF = 300mA, IRTX = 1 IRTX = 0 Min. 46 Typical
850 IF=50mA
20 40 875 40
900 3
Receiver:
Symbol Parameter Detector Threshold Irradiance Overload Irradiance Half Angle (Photodiode) Sunlight Ambient Rejection
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Conditions
Min. 500
Typical 2.5 35
Max. 3.5
no modulation
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500
IMPORTANT NOTICE: Novalog, Inc. reserves the right to make changes to its products and specifications or to discontinue any semiconductor product without notice. Customers are advised to obtain the latest version of a products specification, which should be considered in evaluating its appropriateness for a particular use. There is no assurance that Novalog semiconductors are appropriate for any application by a customer. Novalog, Inc. makes no warranties expressed or implied other than compliance with Novalogs data sheet for the component at the time of delivery. Any claim against Novalog must be made within sixty (60) days from the date of delivery from Novalog or its authorized representative. Novalog has no liability thereafter. Any Novalog representative or authorized distributor liability is limited to replacement of defective items or return of amounts paid for defective items. Novalog, Inc. products are not authorized for use in critical components in life support devices or systems. No warranty is expressed or implied with the correctness of this document. Novalog assumes no responsibility for the use of any circuitry other than circuitry embodied in a Novalog product. No other circuit patent licenses are implied. Information contained herein supercedes previously published specifications.
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