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MAX213 Datasheet(PDF) 6 Page - Maxim Integrated Products |
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MAX213 Datasheet(HTML) 6 Page - Maxim Integrated Products |
6 / 23 page +5V, RS-232 Transceivers with 0.1µF External Capacitors 6 RS-232 Receivers The receivers convert RS-232 signals to CMOS logic output levels. Receiver outputs are inverting, maintain- ing compatibility with driver outputs. The guaranteed receiver input thresholds of +0.8V and +2.4V are signifi- cantly tighter than the Q3.0V threshold required by the EIA/TIA-232E specification. This allows receiver inputs to respond to TTL/CMOS logic levels and improves noise margin for RS-232 levels. The MAX200–MAX209/MAX211/MAX213 guaranteed +0.8V threshold (+0.6V in shutdown for the MAX213) ensures that receivers shorted to ground have a logic 1 output. Also, the 5kI input resistance to ground ensures that a receiver with its input left open also has a logic 1 output. Receiver inputs have approximately +0.5V hysteresis. This provides clean output transitions, even with slow rise and fall time input signals with moderate amounts of noise and ringing. In shutdown, the MAX213 receivers R4 and R5 have no hysteresis. Figure 3. Transition Slew-Rate Test Circuit Figure 4. Dual Charge-Pump Diagram +5V 0V (+5V) 0V (+5V) 0.1FF 0.1FF 0.1FF C1+ C1- C2+ C2- 400kI 3kI 2500pF 5kI VCC V+ V- TIN +5V T1 T0 T5 R1 T0 R5 TOUT RIN 0.1FF ROUT SHDN (SHDN) EN (EN) MAX200-MAX209 MAX211 MAX213 +5V 0V (+5V) MAXIMUM SLEW-RATE TEST CIRCUIT MINIMUM SLEW-RATE TEST CIRCUIT NOTE: ( ) ARE FOR MAX213. 0V (+5V) 0.1FF 0.1FF 0.1FF C1+ C1- C2+ C2- 400kI 7kI 50pF 5kI VCC V+ V- TIN +5V T1 T0 T5 R1 T0 R5 TOUT RIN 0.1FF ROUT SHDN (SHDN) EN (EN) MAX200-MAX209 MAX211 MAX213 0.1FF 0.1FF V+ V+ S5 S1 S2 C1+ S6 C2+ IL+ C3 C2 C4 GND RL- V- S7 S8 GND VCC IL- RL+ C2- C1 VCC 200kHz S3 S4 C1- GND |
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Similar Description - MAX213 |
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