MAX3131：3V至5.5V、IrDA红外收发器，集成的RS-232接口

The MAX3130/MAX3131 combine an IrDA 1.2 compatible infrared transceiver with an RS-232 interface-all in a single 3V-powered hybrid microcircuit. The infrared transceiver supports IrDA data rates of 2.4kbps to 115kbps. The infrared receive channel provides a high-gain/low-noise PIN-diode amplifier with 100µA of ambient photodiode current rejection at a +3V supply. A high-power LED driver capable of sinking 200mA is included in the infrared transmit path. The on-board encoder/decoder (ENDEC) compresses/stretches signals to and from the external UART, allowing IrDA communication even with non-IrDA UARTs. A 2-driver/2-receiver RS-232 transceiver supports data rates up to 120kbps. A proprietary, high-efficiency, dual charge-pump power supply and a low-dropout transmitter combine to deliver true RS-232 performance from a single +3.0V to +5.5V supply. Selectable shutdown for IR and RS-232 circuitry reduces supply current to 1µA. The MAX3130 is optimized for applications using a single UART for both infrared and RS-232 communication. The infrared transmitter input and infrared receiver output are multiplexed with one RS-232 transmitter input and one RS-232 receiver output, respectively. The MAX3131's IrDA transceiver and RS-232 transceivers are separate and have their own data inputs and outputs. Both these devices require a minimum of external components: four small 0.1µF capacitors, a photodiode, an infrared LED, and a current-setting resistor.

关键特性

Integrated RS-232 and IrDA in Single 28-Pin SSOP Package
370µA Supply Current
IrDA 1.2 Compatible: 2.4kbps to 115kbps Data Rate
On-Board IR Encoder/Decoder Allows Use of Non-IrDA UARTs
+3.0V to +5.5V Single-Supply Operation
Meet EIA/TIA-232 Specifications Down to +3V
200mA, High-Current Infrared LED Drive
1µA Low-Power Shutdown with RS-232 Receivers Active

MAX3130、MAX3131：引脚配置

应用

电池供电应用
蜂窝电话
手持式装置
IrDA应用
掌上电脑
PDA及其它手持设备
外设

数据手册DataSheet

语言	下载文件	备注
英文	MAX3130-MAX3131.pdf	Rev 0; 11/1998

关键参数

Part Number	Functions	V_SUPPLY (V)	Data Rate (kbps)	Single Ended Tx	Single Ended Rx	Shutdn	µP I/F	I_CC (mA)	I_CC (Shutdown) (µA)	Package/Pins	Budgetary Price
Part Number	Functions	V_SUPPLY (V)	max	Single Ended Tx	Single Ended Rx	Shutdn	µP I/F	max	I_CC (Shutdown) (µA)	Package/Pins	See Notes
MAX3130	IrDA/RS-232 Transceiver	3.0 to 5.5	115.2	2	2	Yes	TTL/CMOS	1	10	SSOP/28	$4.45 @1k
MAX3131	IrDA/RS-232 Transceiver	3.0 to 5.5	115.2	2	2	Yes	TTL/CMOS	1	10	SSOP/28	$7.49 @1k

技术资料

订购型号

型号	状况	推荐替代产品	封装	温度	RoHS/无铅
MAX3131CAI	停止供货		SSOP H；28引脚	0°C至+70°C	参考数据资料
MAX3131CAI-T	停止供货		SSOP；	0°C至+70°C	参考数据资料
MAX3131EAI	停止供货	MAX3131EAI+	SSOP,；28引脚；81.6mm²	-40°C至+85°C	RoHS/无铅：否
MAX3131EAI+	生产中		SSOP,；28引脚；81.6mm²	-40°C至+85°C	RoHS/无铅：无铅
MAX3131EAI+T	停止供货		SSOP H；	-40°C至+85°C	参考数据资料
MAX3131EAI-T	停止供货		SSOP H；	-40°C至+85°C	参考数据资料