1/26
X
6121
X
6122
XC6123/XC6124
Series
Voltage Detector with Watchdog Function and ON/OFF Control (V
DF
=1.6V~5.0V)
0
2.0
4.0
6.0
8.0
10.0
12.0
14.0
0123456
Input Voltage: V
IN
(V)
Supply Current: I
SS
(μA)
ＸＣ６１２１～ＸＣ６１２４(V
DF
=２.７Ｖ）
Ta=85℃
Ta=-40℃
Ta=25℃
■GENERAL DESCRIPTION
The XC6121/XC6122/XC6123/XC6124 series is a group of high-precision, low current consumption voltage detectors with
watchdog functions incorporating CMOS process technology. The series consist of a reference voltage source, delay circuit,
comparator, and output driver. With the built-in delay circuit, the series do not require any external components to output
signals with release delay time. The output type is V
DFL low when detected. The EN/ENB pin can control ON and OFF of the
watchdog functions. By setting the EN/ENB pin to low or high level, the watchdog function can be OFF while the voltage
detector remains operation. Since the EN/ENB pin of the XC6122 and XC6124 series is internally pulled up to the VIN pin or
pulled down to the V
SS
pin, these series can be used with the EN/ENB pin left open when the watchdog functions is used. The
detect voltages are internally fixed 1.6V ~ 5.0V in increments of 0.1V, using laser trimming technology. Six watchdog timeout
periods are available in a range from 50ms to 1.6s. Five release delay times are available in a range from 3.13ms to 400ms.
■FEATURES
Detect Voltage Range : 1.6V ~ 5.0V, +2%
0.1V increments
H
steresis Width : VDFL x 5%
TYP.
Operating Voltage Range : 1.0V ~ 6.0V
Detect Voltage Temperature
Characteristics
: +100ppm/
O
C (TYP.)
Output Confi
uration : N-channel open drain
Watchdog Pin : Watchdog input
If watchdog input maintains ‘H’ o
‘L’ within the watchdog timeout
period, a reset signal is output
from the RESETB pin.
EN/ENB Pin : When the EN/ENB pin voltage is
set to low or high level, the
watchdog function is forced off.
Release Delay Time : 400ms, 200ms, 100ms, 50ms,
3.13ms (TYP.)
Watchdog Timeout Period : 1.6s, 800ms, 400ms, 200ms,
100ms, 50ms (TYP.)
Operating
mbient Temperature
Packages
Environmentally Friendly
:
-40℃~ +85℃
: SOT-25, USP-6C
: EU RoHS Compliant, Pb Free
■
PPLICATIONS
●Microprocessor watchdog monitoring
and reset circuits
●Memory battery backup circuits
●System power-on reset circuits
●Power failure detection
■TYPICAL APPLICATION CIRCUIT ■TYPICAL PERFORMANCE
CHARACTERISTICS
●Supply Current vs. Input Voltage
ETR0209-011b
