U2640B Datasheet, PDF (5/10 Pages) ATMEL Corporation – Intemittent- and Wipe/ Wash Control for Wiper Systems

U2640B
Electrical Characteristics (continued)
Reference point Ground GND, T_amb = 25_C, V_Batt = 13.5 V, unless otherwise specified (see figures 11 and 12)
Parameters
Test Conditions / Pin Symbol Min
Typ
Max
Unit
Input limit switch LS
Pin 3
Internal protection-diode I_LS = 10 mA
voltage
V_LS
19.5
21.0
25.5
V
Internal capacitor
Switching threshold
voltage
C_LS
25
pF
V_LS 0.375 VS 0.5 VS 0.675 VS
V
Input current
Internal pull-up resistor
V_LS = V_S
External protection resistor
Inputs INT, WIWA and PP
I_LS
1
mA
R_LS
13
20
27
kW
R_S
10
kW
Pins 1, 2 and 4
Internal protection-diode I_E = 10 mA
voltage
V_E
19.5
21.0
25.5
V
Internal capacitor
Switching threshold
voltage
C_E
25
pF
V_E
0.375 V_S 0.5 V_S 0.675 V_S
V
Input current
V_E = 0 V
Internal pull-down resistor
External protection resistor
Relay output
–I_E
1
mA
R_E
13
20
27
kW
R_S
10
kW
Pin 6
Saturation voltage
Saturation voltage
Z-diode clamp voltage
Leakage current
Relay coil resistance
Load-dump protection
threshold
I = 100 mA
I = 200 mA
I = 10 mA
V = 14 V
V_REL
1.1
V
V_REL
1.5
V
V_REL
19.5
21.0
25.5
V
I_REL
12
mA
R_REL
60
W
V_Batt
28
33
42
V
Internal pulse times
Debouncing period inputs INT/WIWA 12 - 16 clocks t_D
60
70
80
ms
Debouncing period inputs LS
3 – 4 clocks t_DL
15
17.5
20
ms
Relay activation time
96 clocks t_ON
480
ms
Intermittent pause
t_INT
5.92
s
After wiping period
1024 " 68 clocks t_WIWA
4.78
5.46
s
Pre-wash delay, reaction
time for switch-on delay =
88 – 96 clocks t_DEL
440
480
ms
t_DEL + t_D
Note: All internally generated time sequences are derived from the oscillator frquency. The tolerances refer to a
frequency adjusted to f_OSC = 200 Hz.
Rev. A4, 03-Apr-01
5 (10)