U6813B ATMEL Corporation, U6813B Datasheet - Page 11

• Manufacturer Part Number: U6813B
• Description: U6813b Fail-safe Ic With High-side And Relay Driver
• Manufacturer: ATMEL Corporation

7. Electrical Characteristics (Continued)
V
f
4543B–AUTO–10/05
intern
CC
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Note:
15.10
15.11
14.1
15.1
15.2
15.3
15.4
15.5
15.6
15.7
15.8
15.9
16.1
16.2
16.3
16.4
No.
14
15
16
= 5V, T
= 200 kHz +50%/–45%, f
1. If V
Parameters
RC Oscillator WDC
Oscillator frequency
Watchdog Timing
Power-on-reset
prolongation time
Detection time for
RC-oscillator fault
Time interval for
over/under-voltage
detection
Reaction time of reset
output at over/under
voltage
Nominal frequency for
WDI
Nominal frequency for
WDC
Minimum pulse
duration for a
guaranteed WDI
input-pulse detection
Frequency range for a
correct WDI signal
Number of incorrect
WDI trigger counts for
locking the outputs
Number of correct
WDI trigger counts for
releasing the outputs
Detection time for a
stucked WDI signal
Watchdog Timing Relative to f
Minimum pulse
duration for a
guaranteed WDI
input-pulse detection
Frequency range for a
correct WDI signal
Hysteresis range at
the WDI ok margins
Detection time for a
stucked WDI signal
(WDI dropout)
amb
= –40 to +125°C; reference pin is GND or SGND (over- and under-voltage detection);
S
> 26 V the current has to be limited at 5 mA by an external resistor.
WDC
= 5 kHz ±10%; f
Test Conditions
R
C
V
f
f
f
f
V
f
V
RC
WDI
WDC
WDC
WDC
CR
WDI
WDI
OSC
OSC
= 100 f
= constant
= 1/100 f
= 5 kHz
= 5 kHz
= 5 kHz
= constant
= constant
= 6.8 nF
= 36 k
WDC
WDI
WDC
WDI
= 50 Hz, bootstrap capacitor C
Pin
10
Symbol
t
n
t
t
WDIerror
t
RCerror
t
f
D,OUV
R,OUV
f
t
n
release
f
P,WDI
f
WDC
WDC
POR
WDI
WDI
lock
Boot
0.187
32.35
Min.
34.3
81.9
0.16
364
250
4.5
10
49
80
1
= 47 nF at pin CAPI
Typ.
5
3
3
2
1
103.1
56.25
Max.
0.64
0.72
246
170
251
5.5
6.5
65
51
cycles
cycles
cycles
cycle
Unit
kHz
kHz
ms
ms
ms
ms
ms
Hz
Hz
µs
U6813B
Type*
D
D
D
D
A
A
A
A
A
A
A
A
A
A
A
A
11