MAX696EWE+T Maxim Integrated Products, MAX696EWE+T Datasheet - Page 13

• Manufacturer Part Number: MAX696EWE+T
• Description: IC SUPERVISOR MPU 16-SOIC
• Manufacturer: Maxim Integrated Products
• Type: Battery Backup Circuitr

Specifications of MAX696EWE+T

• Number Of Voltages Monitored: 2
• Output: Push-Pull, Push-Pull
• Reset: Active High/Active Low
• Reset Timeout: 35 ms Minimum
• Voltage - Threshold: Adjustable/Selectable
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.300", 7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 1. MAX696 and MAX697 Reset Pulse Width and Watchdog Timeout Selections
(Notes 1, 2)
Table 2. Input and Output Status in Battery-Backup Mode
Note 1: When the MAX696/MAX697 OSC SEL pin is low, OSC IN can be driven by an external clock signal, or an external capacitor
Note 2: See the Electrical Characteristics table for minimum and maximum timing values.
Note 3: High for the OSC SEL pin should be connected to V
Low
Low
High/Floating
High/Floating
OSC SEL
(Note 3)
can be connected between OSC IN and GND. The nominal internal oscillator frequency is 10.24kHz. The nominal oscillator
frequency with external capacitor is f
V
LOW LINE
BATT
BATT ON
OSC SEL
CE OUT
OSC IN
RESET
RESET
CE IN
WDO
WDI
PFO
V
I/O
PFI
CC
, V
______________________________________________________________________________________
OUT
External Clock Input 1024 clocks
External Capacitor
Low
Floating
OSC IN
Microprocessor Supervisory Circuits
V
Logic-low.
Logic-high. The open-circuit output voltage is equal to V
Logic-low.
Logic-high (MAX696 only).
WDI is internally disconnected from its internal pullup and does not source or sink current as
long as its input voltage is between GND and V
current.
Logic-high.
The power-fail comparator is turned off and the power-fail input voltage has no effect on the
power-fail output.
Logic-low.
CE IN is internally disconnected from its internal pullup and does not source or sink current
as long as its input voltage is between GND and V
supply current (MAX696 only).
Logic-high (MAX697 only).
OSC IN is ignored.
OSC SEL is ignored.
Approximately 12µA is drawn from the V
and (V
700mV.
BATT
400ms/47pF x C
100ms
1.6s
OSC
BATT
is connected to V
(Hz) = 184,000/C
- 700mV). The supply current is 1µA maximum when V
NORMAL
WATCHDOG TIMEOUT PERIOD
OUT
, not V
OUT
OSC
with an internal MOSFET (MAX696 only).
CC
(pF).
(on the MAX696).
4096 clocks
1.6s/47pF x C
1.6s
1.6s
BATT
IMMEDIATELY
AFTER RESET
STATUS
input when V
OUT
OUT
. The input voltage does not affect supply
. The input voltage does not affect
OUT
CC
.
is between (V
CC
512 clocks
200ms/47pF x C
50ms
50ms
is less than V
RESET TIMEOUT
BATT
PERIOD
+ 100mV)
BATT
-
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