U5021M Datasheet, PDF (9/11 Pages) ATMEL Corporation – DIGITAL WINDOW WATCHDOG TIMER

U5021M
Electrical Characteristics (Continued)
V_DD = 5 V; T_amb = -40°C to +85°C; reference point is pin 7, unless otherwise specified
Parameters
Test Conditions
Pin
Symbol Min.
Timing
Frequency deviation⁽¹⁾
Debounce time
R₁ = 66 kΩ, C₁ = 470 pF,
V_DD = 4.5 V to 5.5 V
∆f
2, 3
3
Debounce time
1
96
Maximum trigger pulse length
t_trgmax
Power-up reset time
t_o
Switch over mode time
t₁
Disable time
Short watchdog window
t₂
Enable time
Short watchdog window
t₃
Disable time
Long watchdog window
t₄
Enable time
Long watchdog window
t₅
Reset-out time
t₆
Note: 1. Frequency deviation also depends on the tolerances of the external components
Typ.
45
201
1,112
130
124
71,970
30,002
40
Max.
Unit
5
%
4
Cycle
128
Cycle
Cycle
Cycle
Cycle
Cycle
Cycle
Cycle
Cycle
Cycle
Ordering Information
Extended Type Number
U5021M-NFP
Package Information
Package
SO8
Remarks
–
Package SO8
5.2
Dimensions in mm _5.00
4.8
4.85
3.7
1.4
0.4
0.25
0.10
3.8
0.2
1.27
6.15
3.81
5.85
8
5
technical drawings
according to DIN
specifications
1
4
9
4756C–AUTO–09/04