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ELM322SM Datasheet(PDF) 3 Page - ELM Electronics |
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ELM322SM Datasheet(HTML) 3 Page - ELM Electronics |
3 / 18 page Elm Electronics – Circuits for the Hobbyist < http://www.elmelectronics.com/ > ELM322 Electrical Characteristics Absolute Maximum Ratings Storage Temperature....................... -65°C to +150°C Ambient Temperature with Power Applied....................................-40°C to +85°C Voltage on VDD with respect to VSS............ 0 to +7.5V Voltage on any other pin with respect to VSS........................... -0.6V to (VDD + 0.6V) Note: Stresses beyond those listed here will likely damage the device. These values are given as a design guideline only. The ability to operate to these levels is neither inferred nor recommended. 3 of 18 All values are for operation at 25°C and a 5V supply, unless otherwise noted. For further information, refer to note 1 below. Characteristic Minimum Typical Maximum Conditions Units Supply voltage, VDD 4.5 5.0 5.5 V VDD rate of rise 0.05 V/ms Average supply current, IDD 1.0 2.4 mA Notes: 1. This integrated circuit is produced with a Microchip Technology Inc.’s PIC12C5XX as the core embedded microcontroller. For further device specifications, and possibly clarification of those given, please refer to the appropriate Microchip documentation (available at http://www.microchip.com/). 2. This spec must be met in order to ensure that a correct power on reset occurs. It is quite easily achieved using most common types of supplies, but may be violated if one uses a slowly varying supply voltage, as may be obtained through direct connection to solar cells, or some charge pump circuits. 3. Device only. Does not include any load currents. 4. This specification represents the current flowing through the internal protection diodes when the voltage connected to the Rx input (through a current limiting resistance) is greater than VDD or less than VSS. Currents quoted are the maximum that should be allowed to flow continuously. 5. Nominal data transfer rate when a 3.58 MHz crystal is used as the frequency reference. Data is transferred to and from the ELM322 with 8 data bits, no parity, and 1 stop bit (8 N 1). Input low voltage VSS 0.15 VDD V Input high voltage VDD V 0.85 VDD Output low voltage 0.6 V Output high voltage V VDD - 0.7 Current (sink) = 8.7 mA Current (source) = 5.4 mA see note 2 ELM322DSE see note 3 Rx pin input current mA see note 4 -0.5 RS232 baud rate baud see note 5 9600 +0.5 |
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