MAX202E Datasheet – RS-232 Transceiver

Part Number : MAX202E

Function : ±15kV ESD-Protected, +5V RS-232 Transceiver

Package : DIP, SO, TSSOP 16, 20 Pin Type

Manufacturers : Maxim Integrated

Pinouts :

MAX202E datasheet

Description :

The MAX202E–MAX213E, MAX232E/MAX241E line drivers/receivers are designed for RS-232 and V.28 communications in harsh environments. Each transmitter output and receiver input is protected against  15kV electrostatic discharge (ESD) shocks, without latchup. The various combinations of features are outlined in the Selector Guide.The drivers and receivers for all ten devices meet all EIA/TIA-232E and CCITT V.28 specifications at data rates up to 120kbps, when loaded in accordance with the EIA/TIA-232E specification.

The MAX211E/MAX213E/MAX241E are available in 28-pin SO packages, as well as a 28-pin SSOP that uses 60% less board space. The MAX202E/MAX232E come in 16-pin TSSOP, narrow SO, wide SO, and DIP packages. The MAX203E comes in a 20-pin DIP/SO package, and needs no external charge-pump capacitors. The MAX205E comes in a 24-pin wide DIP package, and also eliminates external charge-pump capacitors. The MAX206E/MAX207E/MAX208E come in 24-pin SO, SSOP, and narrow DIP packages. The MAX232E/MAX241E operate with four 1µF capacitors, while the MAX202E/MAX206E/MAX207E/MAX208E/MAX211E/MAX213E operate with four 0.1µF capacitors, further reducing cost and board space.

Next-Generation Device Features

1. For Low-Voltage Applications
MAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246E: ±15kV ESD-Protected Down to 10nA, +3.0V to +5.5V, Up to 1Mbps, True RS-232 Transceivers (MAX3246E Available in a UCSP Package)

2. For Low-Power Applications
MAX3221/MAX3223/MAX3243: 1µA Supply Current, True +3V to +5.5V RS-232 Transceivers with Auto-Shutdown

3. For Space-Constrained Applications
MAX3233E/MAX3235E: ±15kV ESD-Protected, 1µA, 250kbps, +3.0V/+5.5V, Dual RS-232 Transceivers with Internal Capacitors

4. For Low-Voltage or Data Cable Applications

MAX3380E/MAX3381E: +2.35V to +5.5V, 1µA, 2Tx/2Rx RS-232 Transceivers with ±15kV ESD Protected I/O and Logic Pins

Other data sheets within the file :


MAX202E Datasheet PDF Download

MAX202E pdf

SA58646 Datasheet – UHF 900 MHz Transceiver IC

This is Transceiver IC.

Part Number : SA58646

Function : UHF 900 MHz transceiver IC

Package : LQFP64, SOT314-2 Type

Manufacturers : NXP Semiconductors.

Pinouts :

SA58646 datasheet


Description :

The SA58646 is a BiCMOS integrated circuit that performs all functions from the antenna to the microcontroller for reception and transmission for both the base station and the handset in a 902 MHz to 928 MHz full-duplex radio. The SA58646 may be used in a UHF push-to-talk walkie-talkie or in a UHF to 900 MHz data transceiver. The IC is a pin-compatible derivative of the UAA3515 with advanced features.
This IC integrates most of the functions required for a half-duplex or full-duplex radio in a single integrated circuit. Additionally, the programmability implemented reduces significantly external components count, board space requirements and external adjustments.


1. RF RX (single frequency conversion FM receiver) :

(1) Integrated LNA
(2) Image reject mixer
(3) FM detector at 10.7 MHz including an IF limiter, a wide band PLL demodulator, an  output amplifier and a RSSI output
(4) Carrier detection with programmable threshold
(5) Programmable data amplifier (slicer) phase

2. Synthesizer :

(1) Crystal reference oscillator with integrated tuning capacitor
(2) Reference frequency divider
(3) Narrow band RX PLL including RX VCO with integrated varicaps
(4) Narrow band TX PLL including TX VCO with integrated varicaps
(5) VCO external inductors can be done with printed transmission lines on the PCB which offers substantial savings
(6) Programmable clock divider with output buffer to drive a microcontroller

3. Baseband RX section :

(1) Programmable RX gain (enable phone volume control)
(2) Expander with output noise level control
(3) Earpiece amplifier with volume control feature
(4) Data amplifier

4. Baseband TX section :

(1) Microphone amplifier
(2) Compressor with automatic level control and hard limiter
(3) Programmable TX gain


Other data sheets within the file : SA58646B, SA58646BD

SA58646 Datasheet PDF Download

SA58646 pdf