MAX3320A Datasheet | Maxim Integrated

Description The MAX3320 bines a microprocessor (µP) supervisory circuit with an RS-232 transceiver. The power-on reset performs a single function: it asserts a reset signal whenever the VCC supply voltage declines below a preset threshold, staying asserted for at least 100ms after VCC rises above the reset threshold. The MAX3320 has an active-low RESET output, which is guaranteed to be in the correct state for VCC down to 1V. The reset parator is designed to ignore fast transients on VCC. Reset thresholds suitable for operation with a variety of supply voltages are available. The MAX3320 transceivers have a proprietary lowdropout transmitter output stage, enabling true RS-232 performance with a dual charge pump powered from a +3V to +5.5V supply. The device requires only four small 0.1µF external charge-pump capacitors, and is guaranteed to run at data rates of up to 250kbps. It es in the space-saving 20-pin SSOP package. ____________________________Features o Precise Monitoring of 5V and 3.3V Power Supply Voltages: - 100ms (min) Power-On RESET Pulse Width - Power-Supply Transient Immunity - Guaranteed RESET Valid to VCC = 1V o 4µA Supply Current Achieved with Auto Shutdown Plus o Receivers Always Active o Power-On Reset Always Active o 4µA Low-Power Shutdown o 250kbps Guaranteed Data Rate MAX3320A/B/L/T ________________________Applications Palmtop puters Portable/Battery-Powered Equipment Hand-Held Equipment Peripherals Printers ______________Ordering Information PART- MAX3320_CAP MAX3320_EAP TEMP. RANGE 0°C to +70°C -40°C to +85°C PIN-PACKAGE 20 SSOP 20 SSOP - This part offers a choice of reset threshold voltage. From the table below, select the suffix corresponding to the desired threshold and insert it into the blank to plete the part number. __________________Pin Configuration TOP VIEW V+ 1 C2+ 2 C2- 3 V- 4 T1IN 5 T2IN 6 R1OUT 7 R2OUT 8 INVALID 9 RESET 10 20 C1+ 19 VCC 18 C1- SUFFIX A B L T RESET THRESHOLD (V) 4.25 2.85 4.63 3.08 MAX3320 MAXxxx 17 GND...