< http://www.elmelectronics.com/ >Example Application
ELM446
Electrical Characteristics
3 of 3
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, V
DD
3.0
5.0
5.5
V
V
DD
rate of rise
0.05
V/ms
Average Supply Current, I
DD
0.60
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.
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 value of the pullup resistance is supply and temperature dependent.
Input low voltage
V
SS
0.15 V
DD
V
Input high voltage
V
DD
V
0.85 V
DD
Output low voltage
0.6
V
Output high voltage
V
V
DD
- 0.7
Current (sink) = 8.7mA
Current (source) = 5.4mA
see note 2
ELM446DSB
Output Duty Cycle
%
50
any output
0.1μF
+5V
1
2
3
4
8
7
6
5
50Hz Out
27pF
3.58MHz
Operation of the ELM446 is straightforward,
requiring little explanation. Typically it is
connected in a circuit as shown at the right.
Optionally, one might replace one of the fixed
value capacitors with a variable one, in order to
be able to trim the oscillator frequency for
greater accuracy. As usual, it is also good
practice to place a bypass capacitor across the
power supply as well.
0.35
2.4
mA
see note 3
Reset pin internal pullup resistance
V
DD
= 5V
V
DD
= 3V
K
470
300
600
27pF