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ADM237LJR 데이터시트(PDF) 7 Page - Analog Devices |
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ADM237LJR 데이터시트(HTML) 7 Page - Analog Devices |
7 / 20 page ADM231L–ADM234L/ADM236L–ADM241L Rev. C | Page 7 of 20 Table 4. Pin Function Descriptions Mnemonic Function VCC Power Supply Input. 5 V ± 10% (5 V ± 5% for ADM233L). V+ Internally Generated Positive Supply (+10 V nominal) on all parts, except ADM231L and ADM239L. ADM231L and ADM239L require an external 7.5 V to 13.2 V supply. V− Internally Generated Negative Supply (−10 V nominal). GND Ground Pin. Must be connected to 0 V. C+ (ADM231L and ADM239L only) External capacitor (+ terminal) is connected to this pin. C− (ADM231L and ADM239L only) External capacitor (– terminal) is connected to this pin. C1+ (ADM232L, ADM234L, ADM236L, ADM237L, ADM238L, and ADM241L) External capacitor (+ terminal) is connected to this pin. (ADM233L) The capacitor is connected internally and no external connection to this pin is required. C1− (ADM232L, ADM234L, ADM236L, ADM237L, ADM238L, and ADM241L) External capacitor (− terminal) is connected to this pin. (ADM233L) The capacitor is connected internally and no external connection to this pin is required. C2+ (ADM232L, ADM234L, ADM236L, ADM237L, ADM238L, and ADM241L) External capacitor (+ terminal) is connected to this pin. (ADM233L) Internal capacitor connections, Pin 11 and Pin 15, must be connected together. C2− (ADM232L, ADM234L, ADM236L, ADM237L, ADM238L, and ADM241L) External capacitor (− terminal) is connected to this pin. (ADM233L) Internal capacitor connections, Pin 10 and Pin 16, must be connected together. TIN Transmitter (Driver) Inputs. These inputs accept TTL/CMOS levels. An internal 400 kΩ pull-up resistor to VCC is connected to each input. TOUT Transmitter (Driver) Outputs. These are RS-232 levels (typically ±10 V). RIN Receiver Inputs. These inputs accept RS-232 signal levels. An internal 5 kΩ pull-down resistor to GND is connected on each input. ROUT Receiver Outputs. These are TTL/CMOS levels. EN Enable Input. Active low on ADM236L, ADM239L, and ADM241L. This input is used to enable/disable the receiver outputs. With EN = low, the receiver outputs are enabled. With EN = high, the outputs are placed in a high impedance state. This facility is useful for connecting to microprocessor systems. SD Shutdown Input. Active high on ADM236L and ADM241L. With SD = high on the ADM236L and ADM241L, the charge pump is disabled, the receiver outputs are placed in a high impedance state, and the driver outputs are turned off. NC No Connect. No connections are required to this pin. Table 5. ADM236L and ADM241L Truth Table SD EN Status Transmitters T1 to T5 Receivers R1 to R5 0 0 Normal Operation Enabled Enabled 0 1 Normal Operation Enabled Disabled 1 0 Shutdown Disabled Disabled |
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