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ELM380P

Battery Charger Timer

Elm Electronics 

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)

ELM380

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

3.0

5.0

5.5

V

VDD rate of rise

0.05

V/ms see note 2

Average Supply Current, IDD

1.0

2.4

mA VDD = 5V, see note 3

Internal pullup resistances

(see note 4)

300

500

600

KΩ Pin 4 (reset)

20

30

50

KΩ Pin 6 (8/14) & pin 7 (start)

Debounce period - start input

50

msec with 120Hz (60Hz full-wave) clock

Input current

-0.5

+0.5

mA clock input only, see note 5

Input low voltage

VSS

0.15 VDD

V

Input high voltage

0.85 VDD

VDD

V

Output low voltage

0.6

V Current (sink) = 8.7mA

Output high voltage

VDD - 0.7

V Current (source) = 5.4mA

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. Pullup resistor currents are not included in this figure.

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

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

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

ELM380DSB

Elm Electronics – Circuits for the Hobbyist

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