ELM404
Absolute Maximum Ratings
Storage Temperature....................... -65°C to +150°C
Ambient Temperature with
Voltage Applied..................................-40°C to +85°C
Voltage on V
DD
with respect to V
SS
............ 0 to +6.5V
Voltage on any other pin with
respect to V
SS
........................... -0.3V to (V
DD
+ 0.3V)
Note:
Stresses beyond those listed here will likely
damage this 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
Supply voltage, V
DD
V
DD
rate of rise
Power on reset time
Average supply current, I
DD
Minimum
2.0
0.05
9
Typical
5.0
Maximum Units
5.5
V
Conditions
V/msec see note 2
18
0.6
0.2
30
1.1
0.3
msec
mA
mA
mA
mA
mA
mA
msec
msec
4
%
see note 5
see note 3
V
DD
= 5.0V
V
DD
= 2.0V
V
OL
= 0.25V
V
OL
= 0.25V
V
OH
= 4.75V
V
OH
= 2.75V
see note 4
Output low current
(sink)
V
DD
= 5.0V
V
DD
= 3.0V
10
5.0
2.5
1.7
5.5
50
1
Output high current
(source)
V
DD
= 5.0V
V
DD
= 3.0V
Debounce period
Startup time delay
Internal timing variation
Notes:
1. This integrated circuit is based on a Microchip Technology Inc. PIC12F5XX device. For more detailed
specifications, please refer to the Microchip documentation (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. The internal reset circuitry stops the ELM404 from doing anything during this period, so that the power
supplies and oscillators have time to stabilize. During this time, all pins behave like inputs.
4. Typical only - the actual period varies with the amount of noise present in the input signal.
5. All filtering, delay, and output timing is based on an internal master oscillator. The frequency of this oscillator
will vary with voltage and temperature. Values shown are typical maximums for 2.0V
≤
V
DD
≤
5.5V, and
temperatures of -40°C to +85°C
ELM404DSA
Elm Electronics – Circuits for the Hobbyist
www.elmelectronics.com
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