ELM624 查看數據表（PDF） - Elm Electronics

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ELM624

Control L (LANC) to RS232 Interpreter

Elm Electronics 

ELM624

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.

Electrical Characteristics

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 Units

Conditions

Supply Voltage, VDD

VDD rate of rise

Average Supply Current, IDD

Input low voltage

Input high voltage

Output low voltage

Output high voltage

Internal pullup resistances

(see note 4)

Rx pin input current

RS232 Baud Rate

4.5

0.05

VSS

0.85 VDD

VDD - 0.7

300

20

-0.5

5.0

1.0

500

30

9600

5.5

V

V/ms see note 2

2.4

mA see note 3

0.15 VDD

V

VDD

V

0.6

V Current (sink) = 8.7mA

V Current (source) = 5.4mA

600

KΩ Pin 4 (Enable)

50

KΩ Pin 7 (LANC)

+0.5

mA see note 5

baud see note 6

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.

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. The value of the internal pullup resistance is both supply and temperature dependent.

5. This specification represents the current flowing through the protection diodes when applying large voltages

to the Rx input (pin 5) through a current limiting resistance. Currents quoted are the maximum continuous.

6. Nominal data transfer rate. Assumes that a 3.58 MHz crystal is used as a frequency reference. Data is

transferred to and from the ELM624 with 8 data bits, no parity, and 1 stop bit (8N1).

ELM624DSD

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