Auto-powerdown Plus

Operate With 3-V to 5.5-V VCC Supply

Always-Active Noninverting Receiver

Output (ROUT1B)

Support Operation From 250 kbit/s to

1 Mbit/s

Low Standby Current . . . 1 μA Typ

External Capacitors . . . 4 × 0.1 μF

Accept 5-V Logic Input With 3.3-V Supply

Inter-Operable With SN65C3243,

SN75C3243

RS-232 Bus-Pin ESD Protection Exceeds

±15-kV Using Human-Body Model (HBM)

Applications

− Battery-Powered Systems, PDAs,

Notebooks, Sub-Notebooks, Laptops,

Palmtop PCs, Hand-Held Equipment,

Modems, and Printers

description/ordering information

The ’C3238 devices consist of five line drivers, three line receivers, and a dual charge-pump circuit with ±15-kV

ESD protection pin to pin (serial-port connection pins, including GND). The charge pump and four small external

capacitors allow operation from a single 3-V to 5.5-V supply. In addition, these devices include an always-active

noninverting output (ROUT1B), which allows applications using the ring indicator to transmit data while the

device is powered down. These devices operate at data signaling rates up to 1 Mbit/s and at an increased

slew-rate range of 24 V/μs to 150 V/μs.