IBM31T1100A Integrated Infrared Transceiver Module Highlights x IrDA 1.1, HP-SIR and Sharp ASK compliant x Supports IrDA data rates up to 4 Mbps x Low profile (height = 5.6 mm max.) x Minimum external components x On-chip LED protection circuit x Low power consumption x 5 V Supply Voltage x Complete differential receiver design x Ambient light and noise rejection circuitry x Shutdown pin for power management x Programmable bandwidth control x Compatible with all major Super I/Os Package Vcc 3 Noise Rejection Circuit + Amp Comp 2 Driver RX Vcc General Description The IBM31T1100A is a multi-mode integrated infrared (IR) transceiver module for data communication systems. The transceiver supports IrDA speeds up to 4 Mbps, HP-SIR and Sharp ASK modes. Integrated into this tiny package is a photodiode, LED and analog transceiver ASIC to provide a total solution in a single package. A current limiting resistor in series with the LED and a Vcc bypass capacitor are the only external components required to implement a complete transceiver. 8 SD/BW TX 7 LEDA BW 6 Control logic SD Driver 4 GND Block Diagram 1 LEDC IBM31T1100A Pin Assignments and Descriptions TX LEDA 7 8 6 LED LEDC Pin Name 1 LEDC 2 RX 3 Vcc 4 GND 5 NC 6 SD/BW 7 8 TX LEDA Guide Pins (not shown above) 5 Photodiode 1 Pin NC SD/BW 2 3 RX V CC 4 GND Description Indicates the state of the internal LED cathode. Normally not connected. 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. May switch indeterminately when the IBM31T1100A is transmitting. Connect to +5 V power supply. Place a 1.0-10 PF ceramic bypass capacitor as close as possible to this pin. Connect to ground of the power supply. A solid ground plane is recommended for proper operation. This pin is reserved for special application use only. No signal should be connected to this pin. This CMOS input is used to put the IBM31T1100A in shutdown mode. Nominal supply current draw in this mode is 35 PA versus 5 mA in normal mode. Together with the TX input, this pin also sets the receiver bandwidth. If TX is low when SD/BW transitions from high to low, the receiver bandwidth is optimized for operation up to 1.2 Mbps. If TX is high when SD/BW transitions from high to low, the receiver bandwidth is optimized for operation at 4 Mbps. Used to transmit serial data when SD/BW is low. This CMOS input controls the LED driver. An on-chip protection circuit disables the LED driver if TX is high for more than 60 Psec. This pin is also used to program the bandwidth of the receiver. See SD/BW pin description. Connect this input to Vcc through a resistor to set the proper LED current. Add an external LED in series to increase output intensity if required. Two through-hole guide pins provide mechanical stability during board mounting. They also improve heat conduction when the part is in operation. NOTE: The IBM31T1100A is pin and plug compatible with the Temic TFDS6000D. 2 I/O Active O Low O Low I High I High I IBM31T1100A Electrical and Timing Specifications Absolute Maximum Ratings Symbol V CC Parameter Min Supply Voltage Range - 0.5 Typ Max Unit 6 V Condition PD Power Dissipation 450 mW TJ Junction Temperature 125 °C 85 °C Soldering Temperature 240 °C See application notes LED Current 0.8 A <2 µs, ton<10% Vcc+ 0.5 V Storage Temperature Range ILED - 25 Voltage at Any Pin - 0.5 Recommended Operating Conditions Symbol Parameter Min Typ Max Unit V CC Supply Voltage 4.5 5 5.5 V TA Operating Temperature Range 70 °C DC Electrical Characteristics Symbol 0 Condition TA = 0 - 70 qC, VCC = 5 V r 10 %, unless otherwise specified Parameter Min Typ Max Unit Condition ICC Dynamic Supply Current 5 7 mA SD = 0 V ICC Standby Supply Current 35 100 uA SD = VCC - 0.5, SC = NC ILED Repetitive Pulsed LED Current 0.55 A < 60 µs, ton d 25 % V OL RX Output Voltage Low @ IOL = 2.5 mA 0.5 V V OH RX Output Voltage High @ -IOH = 2.5 mA V IL Input Voltage Low (TX, SD/BW) V IH Input Voltage High (TX) V IH Input Voltage High (SD/BW) IL Input Leakage Current CI Input Capacitance 0.3 VCC - 0.5 0 V 0.8 V 3.0 V VCC - 0.5 V -10 3 +10 uA 5 pF IBM31T1100A TA = 0 - 70 qC, VCC = 5 V r 10 %, unless otherwise specified AC Electrical Characteristics Symbol Parameter Min Typ Max Unit RLED = 2.0 K:, C = 50 pF tR RX Rise Time 10 40 ns tF RX Fall Time 10 40 ns tS TX Setup Time to SD/BW Low 200 ns tH TX Hold Time from SD/BW Low 200 ns t PW RX Pulse Width 0.8 20 us 9.6 kbps t PW RX Pulse Width 100 500 ns 1.2 Mbps t PW RX Pulse Width 60 165 ns 4 Mbps t PW RX Pulse Width 185 290 ns 4 Mbps double pulse 2 us d 1.2 Mbps 2 tD Output Delay @ Ee = 40 mW/cm tL Latency 120 us RX Valid After Shutdown 60 us LEDC Inactive After TX High 60 us t RXEN t DIS_ LED Optical Characteristics Symbol E emin E emin E emin E emax 1 Ie Parameter Min Typ Minimum Detection Irradiance (SIR mode) 0.025 Minimum Detection Irradiance 0.035 Minimum Detection Irradiance Maximum Detection Irradiance 0.07 Max 0.035 0.05 0.08 5000 140 320 (1) Unit 9.6 - 115 kbps -2 1.2 Mbps -2 4 Mbps -2 Wm All speeds mW/sr Tx = High, SD = Low, RLED = 5.6 : Wm Wm Wm VCC=5.0, D=0 q, D=r15 q, TA=25 qC r24 Output Radiant Intensity Half Angle Peak Wavelength Condition -2 Output Radiant Intensity 0.4 D OP RLED = 2.0 K:, C = 50 pF TA = 0 - 70 qC, VCC = 5 V r 10%, unless otherwise specified 100 880 Optical Overshoot 1. Condition Maximum intensity specified for class 1 operation of IEC 825-1 4 uW/sr q 900 nm 25 % Tx=Low or SD=High, RLED=5.6 : VCC=5.0, D=0 q, D=r15 q, TA=25 qC I F LED Forward Current (mA) IF Forward Current (mA) IBM31T1100A 700 600 500 Min 400 Max 300 200 100 2.0 2.2 2.4 Input Irradiance in mW/cm**2 Output Intensity in mW/Sr Typ Min 75 50 25 0.6 200 100 1.9 2.1 100 10.0 1.0 0.1 0.01 0.001 50 0.8 100 150 200 RX pulse width in ns Figure 3. Output Intensity vs. Current Figure 4. RX pulse width vs. Irradiance - 4 Mbps mode. Output Intensity in mW/Sr VLEDA to GND Voltage (V) 1.7 1000 IF Forward Current in Amperes 2.4 2.3 2.2 2.1 Max 300 Figure 2. LED Forward Voltage vs. Current 150 0.4 Min 400 VF LED Forward Voltage (V) - TA = 25°C 175 0.2 500 1.5 Figure 1. VLEDA to GND Voltage vs. peak LED current. 100 600 2.6 VLEDA Forward Voltage (V) - TA = 25°C 125 700 IF =430mA 2.0 1.9 1.8 175 150 125 100 IF =430mA 75 50 25 10 20 30 40 50 60 70 80 10 20 30 40 50 60 70 80 Temperature in °C Temperature in °C Figure 6. Output Intensity vs. Temperature Figure 5. VLEDA to GND Voltage vs. Temperature. 5 IBM31T1100A Timing Diagrams V IH V IH TX SD/BW 50% 50% V IL V IL tL t RXEN V OH 50% RX 50% RX V OL Figure 7. Latency Timing Figure 8. RX valid after Shutdown. V IH TX t PW V OH 50% 50% RX V IL t DIS_LED V OL Vcc LEDC 50% Figure 9. LED Protection Timing t PW Figure 10. RX Timing, 1.2 and 4 Mbps mode tF t RXH 90% VOH RX 50% tR VOH RX 50% 10% VOL Figure 11. RX Timing, SIR mode. The output is indeterminate in the shaded area. Spurious transitions may occur. Figure 12. RX Rise and Fall timing measurements. 6 VOL IBM31T1100A Programming the Receiver Bandwidth The IBM31T1100A powers on with the upper limit of the receiver bandwidth set to 1.2 Mbps operation. To set the bandwidth for operation at 4 Mbps, apply timings as shown in Figure 14 to the SD/BW and the TX inputs. Note that the internal LED driver is disabled when SD/BW is active and is not enabled until the next rising edge of TX. This ensures that the LED(s) will not be active during bandwidth adjustment. It is recommended that the SD/BW pin be connected to GND if bandwidth adjustment and shutdown mode are not used. V IH SD/BW 50% V IL tS tH V IH TX 50% 50% (Setting high bandwidth mode) V IL To switch the IBM31T1100A from the default state to 4 Mbps and vice versa, the programming specifications are as follows: TX (Setting low bandwidth mode) V IL Figure 13. Bandwidth Programming Setting the receiver to 4 Mbps mode Setting the receiver to 9.6 kbps-to-1.2 Mbps mode 1. 2. 3. 1. 2. 3. 4. Set the SD/BW input to logic high. Set the TX input to logic high. Wait tS t 200 ns. Set the SD/BW to logic low. (This high-to-low transition latches the state of TX, which determines the receiver bandwidth.) After waiting tH t 200 ns, set the TX input to logic low. The receiver is now in high bandwidth mode, the optimal setting for 4 Mbps operation. 4. Set the SD/BW input to logic high. Ensure that the TX input is at logic low. Wait tS t 200 ns. Set the SD/BW to logic low. (This high-to-low transition latches the state of TX, which determines the receiver bandwidth.) Ensure that the TX input remains low for tH t 200 ns. The receiver is now in low bandwidth mode, which is the optimal setting for data rates from 9.6 kbps to 1.2 Mbps. Package Dimensions 13 ± 0.5 5.45 ± 0.5 A 6.5 ± 0.5 3.75 ± 0.5 B 0.5 ± 0.1 0.9 ± 0.1 0.275 ± 0.075 2.35 ± 0.3 6.7 ± 0.4 0.5 B Dimensions in mm. 7 (7X) 1.27 (2X) 1.45 1.5±0.2 0.635 0.6 ± 0.2 5.3 ± 0.3 4.0±0.3 A 3.3 ± 0.5 5 ± 3° 3.7 ± 0.5 0.5 IBM31T1100A Revision History The following changes have been made in the specifications from the IBM31T1100 data sheet. 1. Improved Irradiance values have been updated. 2. LED protection circuit has been added. 3. The RX rise time specification is 40 ns instead of 35 ns. 4. 200K internal pull-down resistor has been removed from the SD/BW pin. 5. Output Intensity and RX pulse width graphs have been updated. £ ¤ International Business Machines Corporation 1995 Printed in the United States of America 5-97 All Rights Reserved £ IBM and the IBM logo are registered trademarks of the IBM Corporation. IBM Microelectronics is a trademark of the IBM Corporation. ¥ Hewlett-Packard is a registered trademark of Hewlett-Packard Corporation. Sharp is a trademark of Sharp Electronics Corporation. Ordering Information Order Part Number IBM31T1100A All other registered trademarks and trademarks are the properties of their respective companies. Qty/Reel 750 Pieces The information provided is believed to be accurate and reliable. IBM reserves the right to make changes to the product described without notice. No liability is assumed as a result of its use nor for any infringement of the rights of others. This document may contain preliminary information and is subject to change by IBM without notice. IBM assumes no responsibility of liability for any use of the information contained herein. Nothing in this document shall operate as an express or implied license or indemnity under the intellectual property rights of IBM or third parties. The products described in this document are not intended for use in implantation or other direct life support applications where malfunction may result in direct physical harm or injury to persons. NO WARRANTIES OF ANY KIND, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE OFFERED IN THIS DOCUMENT. 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