LPM232-B

LPM232-B Serial Converter www.lpelettronica.it Doc. Rev.0 (30/12/10) Features • • • • • • • • • All-In-One Serial Converter RS232-CMOS/TTL. Wide Supply Voltage Range 3.0V to 5.5V. Data rate up to 250kbps. No external components required. Low Shutdown current consumption 1 A. Enable pin to disable TX output (three-state). Very small footprint (39x14.6mm). Pitch 2.54mm (100mils) for easy mouting on prototype boards. Typical Application: connection of microcontroller to PC through RS232 serial cable. Description LPM232-B is a special serial connector with built-in RS232-CMOS/TTL converter. The LPM232 size is similar to the one of a standard RS232 connector (lateral module’s pin added), but it incorporates also the RS232-CMOS/TTL conversion logic so you save a lot of space on the board. The module allows to connect directly an RS232 device (i.e. a PC) to a CMOS/TTL device (i.e. a microcontroller). It is provided also with /SHDWN pin that puts the module in Shutdown mode for very low power consumption. There is also an /EN pin that if pulled high disables the output lines of the module RS232-TX and RS232-RTS putting them in three-state. Typical Application V CC V CC /EN /SHDWN L PM232-B RS232-TX RS232-RX RS232-RTS RS232-CTS MICROCONTROLLER UART-RX UART-TX UART-RTS UART-CTS GND GND Figure 1 – Typical Application schematic LPM232-B www.lpelettronica.it Pin Diagram 1 2 3 4 8 7 6 5 Figure 2 – Pin Diagram (Top View) Pin Description Pin number 1 2 3 4 5 Pin Name RS232-TX RS232-RX RS232-CTS RS232-RTS /EN Pin Type OUT IN IN OUT IN Description TX line of serial communication. The TX pin status is received from the RS232 interface. RX line of serial communication. The RX pin status is transmitted to the RS232 interface. CTS line of serial communication. The CTS pin status is transmitted to the RS232 interface. RTS line of serial communication. The RTS pin status is received from the RS232 interface. Active low enable pin for output lines. An internal pulldown enables the RS232-TX and RS232-RTS lines by default. Set this input to high in order to put the output lines in three-state. Supply voltage Ground. Active low shutdown pin. An internal pull-up enables the module by default. Set this input to low in order to put the module in shutdown and reduce power consumption. 6 7 8 VCC GND /SHDWN POWER POWER IN Table 1 – Pin Description 1 LPM232-B www.lpelettronica.it Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Symbol VCC VIN VOUT Parameter Supply Voltage Input Voltages /EN, /SHDWN, RS232-CTS, RS232-RX Output Voltages RS232-RTS, RS232-TX Rating -0.3V to +6.0V -0.3V to +6.0V ±13.2V Recommended Operating Conditions The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. It is not recommended exceeding them or designing to absolute maximum ratings. Symbol VCC TA Parameter Supply Voltage Operating ambient temperature range Rating +3.0V to +5.5V 0°C to +70°C Electrical Characteristics Symbol IVCC IVCC-SHDWN Baud VIH VIL VOH VOL Parameter DC maximum supply current on VCC DC maximum supply current on VCC in Shutdown Data Baudrate High level input voltage on digital pin Low level input voltage on digital pin High level output voltage on digital pin Low level outputvoltage on digital pin Min 2.4V VCC-0.6V Max 1mA 1A 250Kbps 0.8V 0.4V 2 LPM232-B www.lpelettronica.it Packaging Informations D C 1 2 E 3 4 8 B 7 6 5 A Dim A B C D E Millimeters 35.56 2.54 1.5 39 15.5 Mils 1400 100 39 1535 610 Figure 3 – Package Dimensions 3