MAX690R View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX690R Datasheet PDF : 12 Pages
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3.0V/3.3V Microprocessor Supervisory Circuits
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 3.17V to 5.5V for the MAX690T/MAX704T/MAX80_T, VCC = 3.02V to 5.5V for the MAX690S/MAX704S/MAX80_S, VCC = 2.72V to
5.5V for the MAX690R/MAX704R/MAX80_R; VBATT = 3.6V; TA = TMIN to TMAX; unless otherwise noted. Typical values are at TA = +25˚C.)
PARAMETER
PFI Input Threshold
PFI Input Current
PFI Hysteresis, PFI Rising
PFI Input Current
–M—R– Input Threshold
–M—R– Pulse Width
–M—R– to Reset Delay
–M—R– Pull-Up Current
WDI Input Threshold
WDI Input Current
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
VPFT
VCC < 3.6V
VPFI falling
MAX802_C/E, MAX804_C/E,
MAX806_C/E
MAX690_/MAX704_/MAX805_
1.212 1.237 1.262
V
1.187 1.237 1.287
MAX690_C/E, MAX704_C/E, MAX80_ _C/E
MAX690_M, MAX704_M, MAX80_ _M
-25
2
-500
2
25
nA
500
VPFH VCC < 3.6V
MAX690_C/E, MAX704_C/E,
MAX80_ _C/E
MAX690_M, MAX704_M, MAX80_ _M
10
20
mV
10
25
MAX690_C/E, MAX704_C/E, MAX80_ _C/E
MAX690_M, MAX704_M, MAX80_ _M
-25
2
-500
2
25
nA
500
VIH MAX704_/MAX806_ only
VIL
tMR MAX704_/MAX806_ only
tMD MAX704_/MAX806_ only
MAX704_/MAX806_ only, –M—R– = 0V, VCC = 3V
VIH MAX690_/MAX802_/MAX804_/MAX805_ only
VIL
0.3 x VCC
0.7 x VCC V
100
20
ns
60
500 ns
20
60
350 µA
0.3 x VCC
0.7 x VCC V
0V< VCC < 5.5V
MAX690_C/E, MAX802_C/E,
MAX804_C/E, MAX805_C/E
MAX690_M, MAX802_M,
MAX804_M, MAX805_M
-1 +0.01 +1
µA
-10 +0.01 +10
Watchdog Timeout Period
tWD VCC < 3.6V
MAX690/MAX802/MAX804/
MAX805 only
1.12 1.60 2.24 s
WDI Pulse Width
MAX690_/MAX802_/MAX804_/MAX805_ only
100
20
ns
Note 1:
VCC supply current, logic input leakage,
(MAX704_/806_), PFI functionality, state
watchdog functionality (MAX690_/802_/805_/804_), –M—R– functionality
of –R—E—S—E—T– (MAX690_/704_/802_/806_), and RESET (MAX804_/805_)
tested
at
VBATT = 3.6V, and VCC = 5.5V. The state of –R—E—S—E—T– or RESET and –P—F—O– is tested at VCC = VCC min.
Note 2: Tested at VBATT = 3.6V, VCC = 3.5V and 0V. The battery current will rise to 10µA over a narrow transition window around
VCC = 1.9V.
Note 3: Leakage current into the battery is tested under the worst-case conditions at VCC = 5.5V, VBATT = 1.8V and at VCC = 1.5V,
VBATT= 1.0V.
Note 4: Guaranteed by design.
Note 5: When VSW > VCC > VBATT, VOUT remains connected to VCC until VCC drops below VBATT. The VCC-to-VBATT comparator
has a small 25mV typical hysteresis to prevent oscillation. For VCC < 1.75V (typ), VOUT switches to VBATT regardless of the
voltage on VBATT.
Note 6: When VBATT > VCC > VSW, VOUT remains connected to VCC until VCC drops below the battery switch threshold (VSW).
Note 7:
VOUT switches from VBATT to VCC when VCC
VCC occurs at the exact voltage that causes
rises above the reset threshold, independent of VBATT.
–R—E—S—E—T– to go high (on the MAX804_/805_, RESET goes
Switchover back
low); however
to
switchover occurs 200ms prior to reset.
Note 8: The reset threshold tolerance is wider for VCC rising than for VCC falling to accommodate the 10mV typical hysteresis, which
prevents internal oscillation.
Note 9: The leakage current into or out of the RESET pin is tested with RESET asserted (RESET output high impedance).
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