ADM222 Analog Devices, ADM222 Datasheet
ADM222
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ADM222 Summary of contents
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... Modems Printers Instruments GENERAL DESCRIPTION The ADM222, ADM232A, ADM242 are a family of high speed RS-232 line drivers/receivers offering transmission rates up to 200 kB/s. Operating from a single +5 V power supply, a highly efficient on-chip charge pump using small (0.1 F) external capacitors allows RS-232 bipolar levels to be developed. Two RS-232 drivers and two RS-232 receivers are provided on each device ...
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... ADM222/ADM232A/ADM242–SPECIFICATIONS Parameter RS-232 TRANSMITTERS Output Voltage Swing Input Logic Threshold Low, V INL Input Logic Threshold High, V INH Logic Pullup Current Data Rate Output Resistance Output Short Circuit Current (Instantaneous) RS-232 RECEIVERS RS-232 Input Voltage Range RS-232 Input Threshold Low RS-232 Input Threshold High ...
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... Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. +3V PHLT V+ 0V V– Figure 3. Receiver Propagation Delay Timing +3.5V +0.8V –3– ADM222/ADM232A/ADM242 + PHLR t PLHR ...
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... R1 IN RS-232 9 ** INPUTS SHDN Figure 8. ADM222 DIP & SOIC Pin Configurations –4– PIN FUNCTION DESCRIPTION Function Power Supply Input 10%. Internally generated positive supply (+10 V nominal). Internally generated negative supply (–10 V nominal). Ground Pin. Must be connected External capacitor 1, (+ terminal) is connected to this pin. External capacitor 1, (– ...
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... T1 OUT TTL/CMOS RS-232 * INPUTS OUTPUTS 7 T2 OUT TTL/CMOS RS-232 * ** OUTPUTS INPUTS Figure 12. ADM242 Typical Operating Circuit –5– ADM222/ADM232A/ADM242 1 18 SHDN EN C1 GND T1 C1– ADM242 OUT TOP VIEW R1 C2 (Not to Scale) C2– ...
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... ADM222/ADM232A/ADM242–Typical Performance Characteristics V– I+, ( I– ) – mA Figure 13. Charge Pump V+, V– vs. Current + +25° TX1 = +5V; TX2 = 0V – 5V SQUARE WAVE BOTH TX OUTPUTS LOADED WITH 3k// 1000 2000 LOAD CAPACITANCE – pF Figure 14 ...
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... V. This ensures error free-reception for both noisy inputs and for inputs with slow transition times Enable and Shutdown Functions On the ADM222, both receivers are fully disabled during shutdown. On the ADM242, both receivers continue to operate normally. This function is useful for monitoring activity so that when it occurs, the device can be taken out of the shutdown mode ...
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... ADM222/ADM232A/ADM242 16-Pin Plastic DIP (N-16 0.280 (7.11) PIN 1 0.240 (6.10 0.840 (21.33) 0.745 (18.93) 0.060 (1.52) 0.210 0.015 (0.38) (5.33) 0.200 (5.05) 0.125 (3.18) SEATING 0.022 (0.558) 0.100 0.070 (1.77) PLANE 0.014 (0.356) (2.54) 0.045 (1.15) BSC 16-Lead Wide SOIC (R-16W 0.299 0.419 (7.60) (10.65 0.030 (0.75) 0.413 (10.50) 0.012 (0.3) 0.104 (2.65) 0.05 (1.27) 0.019 (0.49) 0.013 REF (0 ...
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... ADM222AR – +85 C ADM232AAN – +85 C ADM232AARN – +85 C ADM232AARW – +85 C ADM242AN – +85 C ADM242AR – +85 C *For outline information see Package Information section. REV. 0 ADM222/ADM232A/ADM242 Package Option* N-18 R-18W N-16 R-16N R-16W N-18 R-18W –9– ...