MAX3243CDBR

Product Summary

The MAX3243CDBR consists of three line drivers, five line receivers, and a dual charge-pump circuit with ±15-kV ESD (HBM) protection pin to pin (serial-port connection pins, including GND). The device meets the equirements of TIA/EIA-232-F and provides the electrical interface between an asynchronous communication controller and the serial-port connector. This combination of drivers and receivers matches that needed for the typical serial port used in an IBM PC/AT, or compatible. The charge pump and four small external capacitors allow operation from a single 3-V to 5.5-V supply. In addition, the device includes an always-active noninverting output(ROUT2B), which allows applications using the ring indicator to transmit data while the device is powered down. The device operates at data signaling rates up to 250 kbit/s and a maximum of 30-V/μs driver output slew rate.

Parametrics

Absolute maximum ratings: (1)Supply voltage range, VCC: -0.3 V to 6 V; (2)Positive output supply voltage range, V+: -0.3 V to 7 V; (3)Negative output supply voltage range, V- : -0.3 V to .7 V; (4)Supply voltage difference, V+ -V-: 13 V; (5)Input voltage range, VI: Driver (FORCEOFF, FORCEON): -0.3 V to 6 V; Receiver: -25 V to 25 V; (6)Output voltage range, VO: Driver: -13.2 V to 13.2 V; Receiver (INVALID): -0.3 V to VCC + 0.3 V; (7)Package thermal impedance, θJA (see Notes 2 and 3): DB package: 62℃/W; DW package: 46℃/W; PW package: 62℃/W; (8)Operating virtual junction temperature, TJ: 150℃; (9)Storage temperature range, Tstg: -65℃ to 150℃.

Features

Features: (1)Single-Chip and Single-Supply Interface for IBM PC/AT Serial Port; (2)RS-232 Bus-Pin ESD Protection Exceeds ±15 kV Using Human-Body Model (HBM); (3)Meets or Exceeds the Requirements of TIA/EIA-232-F and ITU v.28 Standards; (4)Operates With 3-V to 5.5-V VCC Supply; (5)Three Drivers and Five Receivers; (6)Operates Up To 250 kbit/s; (7)Designed to Transmit at a Data Rate of 250 kbit/s; (8)Low Standby Current: 1 μA Typical; (9)External Capacitors: 4 × 0.1 μF; (10)Accepts 5-V Logic Input With 3.3-V Supply; (11)Always-Active Noninverting Receiver Output (ROUT2B); (12)Alternative High-Speed Pin-Compatible Device (1 Mbit/s)-SNx5C3243; (13)Serial-Mouse Driveability; (14)Auto-Powerdown Feature to Disable Driver Outputs When No Valid RS-232 Signal Is Sensed; (15)Applications: Battery-Powered Systems, PDAs, Notebooks, Laptops, Palmtop PCs, and Hand-Held Equipment.

Diagrams