ELM303
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
3.0
5.0
5.5
V
V/ms
mA
V
see note 2
0.05
Average supply current, IDD
Input low voltage
1.0
2.4
0.15 VDD
VDD
VSS
Input high voltage
0.85 VDD
V
Pin 4 (I0)
Internal pullup resistances
(see note 3)
300
20
500
30
600
50
KW
KW
Pins 6 (Power) and 7 (LANC)
Output low voltage
0.6
V
Current (sink) = 8.7mA
VDD = 5V (see note 4)
VDD = 5V (see note 4)
Circuit timing
Power Pulse
Control L bus
180
200
220
msec
baud
9600
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 internal pullup resistance is both supply and temperature dependent.
4. Circuit timing is affected by supply and temperature variations as shown in Figure 1 below. Results shown
are average values that can be expected.
-6
fast
-4
-2
0
% Error
slow
+2
+4
+6
VDD = 5V
VDD = 3V
-40
0
40
80
Temperature (°C)
Figure 1. Average Timing Error
3 of 5
ELM303DSA
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