adm8698arwz Analog Devices, Inc., adm8698arwz Datasheet - Page 3

• Manufacturer Part Number: adm8698arwz
• Description: ?p Supervisory Circuit With 4.65v Threshold Voltage, Low Supply Current And Active Low Reset Output. Upgrade For Adm698
• Manufacturer: Analog Devices, Inc.

REV. 0
Mnemonic
V
GND
RESET
WDI
RESET
WDO
CC
(SOIC packages only) Logic Output. RESET is
Function
+5 V Power Supply Input.
0 V. Ground reference for all signals.
Logic Output. RESET goes low whenever V
falls below the reset voltage threshold (4.65 V
typ). RESET remains low for a minimum of
140 ms after V
goes low for a minimum of 140 ms if the watchdog
timer is enabled but not serviced within its time-
out period.
Watchdog Input. WDI is a three level input. If
WDI remains either high or low for longer than
the watchdog timeout period, RESET pulses low
and WDO goes low. The timer resets with each
transition on the WDI line. The watchdog timer
may be disabled if WDI is left floating or is driven
to midsupply.
an active high output. It is the inverse of RESET.
(SOIC ADM8699 only) Logic Output. The
Watchdog Output, WDO, goes low if WDI
remains either high or low for longer than the
watchdog timeout period. WDO is set high by the
next transition at WDI. If WDI is unconnected or
at midsupply, the watchdog timer is disabled and
WDO remains high.
PIN FUNCTION DESCRIPTIONS
GND
GND
V
V
GND
GND
CC
CC
V
V
PIN CONFIGURATIONS
NC
NC
NC
NC
CC
CC
1
2
3
4
8-Lead DIP & SOIC
1
2
3
4
5
6
7
8
NC = NO CONNECT
NC = NO CONNECT
*
*( ) ADM8699 ONLY
( ) ADM8699 ONLY
(Not to Scale)
(Not to Scale)
ADM8698/
16-Lead SOIC
(Not to Scale)
(Not to Scale)
ADM8699
ADM8698/
ADM8699
TOP VIEW
TOP VIEW
TOP VIEW
TOP VIEW
CC
O
O
returns to 5 V. RESET also
16
15
14
13
12
11
10
9
8
7
6
5
RESET
RESET
NC (WDO)
NC
NC
NC (WDI)
NC
GND
GND
RESET
NC (WDI)
NC
*
*
*
CC
–3–
TYPICAL PERFORMANCE CURVES
Figure 3. RESET Voltage Threshold vs. Temperature
Figure 2. RESET Timeout Delay vs. Temperature
230
220
210
200
190
180
170
4.69
4.67
4.65
4.63
4.61
4.59
4.57
4.55
Figure 1. RESET Output Voltage vs. V
–50
–60
100
90
10
0%
–30
1V
–30
A4
3.36 V
–10
1V
0
TEMPERATURE – C
TEMPERATURE – C
ADM8698/ADM8699
10
30
30
500ms
60
50
90
70
CC
120
90