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LTC2804IDHC Datasheet(PDF) 8 Page - Linear Technology |
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LTC2804IDHC Datasheet(HTML) 8 Page - Linear Technology |
8 / 18 page LTC2801/LTC2802/ LTC2803/LTC2804 2801234fe Pin FunctionS Mode control PIN NAME PIN NUMBER COMMENTS 2801 2802 2803 2804 2803-1 2804-1 VCC 3 5 5 Input Supply (1.8V-5.5V). Bypass to GND with a 1µF capacitor. VDD 4 6 6 Generated Positive Supply Voltage for RS-232 Driver (7V). Connect a 1µF capacitor between VDD and GND. VEE 13* 17* 9 Generated Negative Supply Voltage for RS-232 Driver (–6.3V). Connect a 1µF capacitor between VEE and GND. SW 5 7 7 Switch Pin. Connect a 10µH inductor between SW and VCC. GND 6 8 8 Ground. CAP 7 9 10 Charge Pump Capacitor for Generated Negative Supply Voltage. Connect a 220nF capacitor between CAP and SW. VL 10 12 12 Logic Supply (1.8V-5.5V) for the receiver outputs, driver inputs, and control inputs. This pin should be bypassed to GND with a 220nF capacitor if it’s not tied to VCC. TIN (T1IN, T2IN) 11 14, 13 14, 13 Driver Input(s), referenced to VL. TOUT (T1OUT, T2OUT) 2 3, 4 3, 4 RS-232 Driver Output(s). RIN (R1IN, R2IN) 1 1, 2 1, 2 RS-232 Receiver Input(s). Includes internal 5kΩ termination resistor(s). ROUT (R1OUT, R2OUT) 12 16, 15 16, 15 Receiver Output(s), referenced to VL. Output is short-circuit protected to GND/VCC/VL, and is high impedance in Shutdown mode, allowing data line sharing. PS 8 10 — Power Supply control pin, referenced to VL. Enables the integrated DC-DC converter. MODE 9 11 — Mode control pin, referenced to VL. See Table 1 for functionality. ON/OFF — — 11 Transceiver enable pin, referenced to VL. A logic low puts the device in Shutdown mode and places both driver and receiver outputs in a high impedance state. *Backside thermal pad Table 1. LTC2801, LTC2802, LTC2803, LTC2804 MODE NAME PS MODE RECEIVER OUTPUT(S) DC-DC DRIVER OUTPUT(S) IVCC* IVL* SHUTDOWN L L HI-Z OFF HI-Z 1µA 1µA RECEIVER(S) ACTIVE L H ON OFF HI-Z 1µA 15µA DRIVER(S) DISABLED H L ON ON HI-Z 2.1mA 80µA OR 150µA NORMAL H H ON ON ON 2.3mA 80µA OR 150µA Table 2. LTC2803-1, LTC2804-1 MODE NAME ON/OFF RECEIVER OUTPUTS DC-DC DRIVER OUTPUTS IVCC* IVL* SHUTDOWN L HI-Z OFF HI-Z 1µA 1µA NORMAL H ON ON ON 2.3mA 150µA *Typical currents for static drivers. Normal mode currents are for unloaded outputs. |
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