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Details, datasheet, quote on part number:LMS202IM
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| Part: | LMS202IM |
| Category: | Interface and Interconnect => RS-232 (EIA-232) => RS-232 Serial Port |
| Description: | LMS202 - 5V Single Supply TIA/EIA-232 Dual Transceivers, Package: Soic Narrow, Pin Nb=16 |
| Company: | National Semiconductor Corporation |
| Datasheet: | Download LMS202IM datasheet File size : 107 kB |
| Request For quote: | Find where to buy LMS202IM
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Datasheet text preview:
LMS202 5V Single Supply TIA/EIA-232 Dual Transceivers
March 2003
LMS202 5V Single Supply TIA/EIA-232 Dual Transceivers
General Description
The LMS202 features two transmitters and two receivers for RS-232 communication. It has a DC-to-DC converter that permits the device to operate with only a single +5V power supply. The on-chip DC-to-DC converter which utilizes four external 0.1µF capacitors to generate dual internal power supplies for RS-232 compatible output levels. The device meet EIA/TIA-232E and CCITT V.28 specifications up to 230kbits/sec. The LMS202 is available in a 16 pin narrow and Wide SOIC package.
Features
n n n n n Single +5V power supply 230 kbps data rate On-board DC-to-DC converter 0.1µF charge pump capacitors Drop-in replacement to Maxim's MAX202
Applications
n POS equipment (Bar code reader) n Hand-held equipment n General purpose RS-232 communication
Connection Diagram and Typical Circuit
20062901
© 2003 National Semiconductor Corporation
DS200629
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LMS202
Pin Descriptions
Pin Number 1, 3 2 4, 5 6 7, 14 Pin Name C1+, C1- V+ C2+, C2- V- T1out, T2out Pin Function External capacitor connection pins. Recommended external capacitor C1 = 0.1µF (6.3V) Positive supply for TIA/EIA-232E drivers. Recommended external capacitor C4 = 0.1µF (6.3V) External capacitor connection pins. Recommended external capacitor C2 = 0.1µF (16V) Negative supply for TIA/EIA-232E drivers. Recommended external capacitor C3 = 0.1µF (16V) Transmitter output pins conform to TIA/EIA-232E levels. The typical transmitter output swing is ± 8V when loaded 3k load to ground. The open-circuit output voltage swings from (V+ - 0.6V) to V- Receiver inputs accept TIA/EIA-232 Transmitter input pins are TTL/CMOS compatible. Inputs of transmitter do not have pull-up resistors. Connect all unused transmitter inputs to ground Ground pin Power supply pin for the device, +5V ( ± 10%)
8,13 9, 12 10, 11 15 16
R1in, R2in Tin1, Tin2 GND VS
R1out and R2out Receiver output pins are TTL/CMOS compatible
Ordering Information
Package Part Number LMS202CM 16-Pin SOIC LMS202CMX LMS202IM LMS202IMX LMS202CMW 16-Pin Wide SOIC LMS202CMWX LMS202IMW LMS202IMWX Package Marking LMS202CM LMS202IM LMS202CMW LMS202IMW Transport Media 48 Units/Rail 2.5k Units Tape and Reel 48 Units/Rail 2.5k Units Tape and Reel 45 Units/Rail 1.0k Units Tape and Reel 45 Units/Rail 1.0k Units Tape and Reel M16B M16A NSC Drawing
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2
LMS202
Absolute Maximum Ratings
(Note 1)
Infrared or Convection (20sec.) Junction Temperature Storage Temperature Range
235°C 150°C -65°C to +150°C
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. VS V+ V- Driver Input Voltage, TIN Receiver Input Voltage, RIN Driver Output Voltage TO Receiver Output Voltage RO Short Circuit Duration, TO ESD Rating Human Body Model (Note 2) Machine Model (Note 6) Soldering Information 2kV 200V -0.3V to 6V (VS - 0.3V) to + 14V +0.3V to -14V -0.3V to (V+ +0.3V)
Operating Ratings
Supply Voltage VS Ambient Temperature Range, TA Commercial (C) Industrial (I) Package Thermal Resistance (Note 3) SO WSO 71°C/W 55°C/W 0°C to +70°C -40°C to +85°C 4.5V to 5.5V
± 30V
(V- -0.3V to (V+ + 0.3V) -0.3 to (VS + 0.3) Continuous
Electrical Characteristics
Over recommended operating supply and temperature ranges unless otherwise specified C1 = C2 = C3 = C4 = Cbp = 0.1µF Symbol DC Characteristics IS Logic IINPUT VTHL VTHH VOL VOH Input Leakage Current Input Logic Theshold Low Input Logic Theshold High TTL/CMOS Output Voltage Low TTL/CMOS Output Voltage High Receiver Input Voltage Range Receiver Input Theshold Low Receiver Input Theshold High Receiver Input Hysteresis Receiver Input Resistance Transmitter Output Voltage Swing Output Resistance Output Short Circuit Current Maximum Data Rate CL = 50pF to 1000pF, RL = 3k to 7k 230 0.08 2.4 1 VS = 5V, TA = 25°C VS = 5V, TA = 25°C VS = 5V VS = 5V, TA = 25°C All transmitters loaded with 3k to GND VS = V+ = V- = 0V, VO = ± 2V 0.2 3 TIN = 0V to VS TIN TIN ROUT, IOUT = 3.2mA ROUT, IOUT = -1.0mA 3.5 VS -0.1 2.0 0.4 Supply Current No Load, TA = 25°C 1 7 mA µA V V V V Parameter Conditions Min (Note 5) Typ Max (Note 5) Units
± 10
0.8
RS-232 Receiver Inputs VRI VRTHL VRTHH VHYST RI VO RO IOS DR TRPLH TRPHL TDPLH TDPHL -30 0.8 1.4 2 0.6 5 2.4 1.0 7 +30 V V V V k V
RS-232 Transmitter Outputs
±5
300
±8
± 11
± 60
mA kbps µs µs
Timing Characteristics
Receiver Propagation Delay CL = 150pF Transmitter Propagation Delay RL = 3k, CL = 2500pF All transmitters loaded
3
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