IL33197AD IKSEMICON [IK Semicon Co., Ltd], IL33197AD Datasheet - Page 6

• Manufacturer Part Number: IL33197AD
• Description: Automotive Wash Wiper Timer
• Manufacturer: IKSEMICON [IK Semicon Co., Ltd]

Recommended External Component Values
parameters will stay within their tolerances. R1 should be greater than 100Ω; recommended value of 220Ω. R1 can be
up to 500Ω, but in this case the tb2v parameter could be out of it’s specified value (see Electrical Characteristics and
Note 1). Also, the minimum operating voltage range should be greater than 8.0 V. The following values should be
adhered to:
10 k≤ R 2 ≤ 6 8 kΩ
1.5 kΩ ≤  R 3 ≤ 4 7 kΩ
R4 ≥  4 .7 kΩ
R5  ≥  4 .7 kΩ
C1≥   4 7 uF
47 nF ≤ C 2 ≤ 4 70 Nf
Application Information
The following is an example of timing calculations using the following external components values:
R2 = 22 kΩ, R3 = 2.2 kΩ, C2 = 100 nF (Referring to Block Diagram and Typical Application).
t
t
t
T3 = 16 × 4 × t
T4 = 144 × 4 × t
(INT connected to Gnd)
T4 = 144 × 4 × t
(INT connected to Vbb)
T2 = 96 × 4 × t
T1 Debounce Time Calculation (see T1 Debounce Timing)
T1 minimum = 4 × t
T1 maximum = 2 × 4 × t
When oscillator is oscillating at tb2:
T1 minimum (INT connected to Gnd, t
T1 maximum (INT connected to Gnd, t
b1
b2
b2
duration = t
duration_g (INT to Gnd) = t
duration_v (INT to Vbb) = t
When oscillator is oscillating at tb1:
Below are the recommended component values to ensure the device will operate properly, and that all specified
Oscillator Time Base Calculation:
Intermittent timing calculation:
Wash wipe timing calculation:
b1
b1
b1
b2
b2
× 4 × R2 × C2 = 1 × 4 × 27e
duration = 16 × 4 × 10.8 ms = 691 ms
= 96 × 4 × 10.8 ms = 4.15 s
duration_g = 144 × 4 × 3.41 ms = 1.96 s
duration_v = 144 × 4 × 2.66 ms = 1.53 s
b1
= 4 × 10.8 ms = 43.2 ms
b1
= 2 × 4 × 10.8 ms = 86.4 ms
b2g
b2v
× R3 × C2 = 15.5 × 2.2e
× R3 × C2 = 12.1 × 2.2e
b2g
b2g
) = 4 × t
) = 2 × 4 × t
3
× 100e–9 = 10.8 ms
b2
= 4 ×3.41 ms = 13.6 ms
b2
= 2 × 4 × 3.41 ms = 27.3 ms
3
3
× 100e–9 = 3.41 ms
× 100e–9 = 2.66 ms
IL33197A
6