XD6121/XD6122
XD6123/XD6124
Series
Voltage Detector with Watchdog Function and ON/OFF Control
ETR02040-001
☆AEC-Q100
Grade3
The XD6121/XD6122/XD6123/XD6124 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 XD6122 and XD6124 series is internally pulled up to the V
IN
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 1.6V, 2.2V, 2.3V, 2.4V, 2.9V, 3.0V, 3.1V, 4.4V, 4.5V, 4.6V, 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.
■GENERAL
DESCRIPTION
■APPLICATIONS
●Microprocessor
watchdog monitoring
and reset circuits
●Memory
battery backup circuits
●System
power-on reset circuits
●Power
failure detection
■FEATURES
Detect Voltage Range
: 1.6V, 2.2V, 2.3V, 2.4V, 2.9V,
(Standard)
3.0V, 3.1V,
4.4V
,
4.5V
,
4.6V
Hysteresis Width
: V
DFL
x 5% (TYP.)
Operating Voltage Range
: 1.0V ~ 6.0V
Detect Voltage Temperature
: +100ppm/
O
C (TYP.)
Characteristics
Output Configuration
: N-channel open drain
Watchdog Pin
: Watchdog input
If watchdog input maintains ‘H’ or
‘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 Ambient Temperature
: -40℃~ +85℃
Package
: SOT-25
Environmentally Friendly
: EU RoHS Compliant, Pb Free
■TYPICAL
APPLICATION CIRCUIT
■TYPICAL
PERFORMANCE
CHARACTERISTICS
●Supply
Current vs. Input Voltage
XD6121/XD6122
XD6123/XD6124
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XD6121/XD6122/XD6123/XD6124
Series
■PRODUCT
CLASSIFICATION
●Selection
Guide
RESET OUTPUT
SERIES
V
DFL
(RESETB)
(*1)
N-channel open drain
N-channel open drain
N-channel open drain
N-channel open drain
V
DFH
(RESET)
-
-
-
-
HYSTERESIS
EN/ENB PIN FUNCTION
EN/ENB Input
Logic
(*2)
EN
EN
ENB
ENB
Pull-Up or Down
Resistor
With No Pull-Up
Resistor
With Pull-Up
Resistor
With No Pull-Down
Resistor
With Pull-Down
Resistor
XD6121
XD6122
XD6123
XD6124
(*1)
(*2)
Available:
V
DFL
x 5% (TYP.)
The output type of RESETB is set to L level at the time of detection.
EN input logic: The watchdog function turns on when the EN pin becomes high level.
ENB input logic: The watchdog function turns on when the ENB pin becomes low level.
●Ordering
Information
XD6121①②③④⑤⑥-⑦
(
*2
)
: N-channel Open Drain Output (RESETB), EN Pin: No Pull-Up Resistor
XD6122①②③④⑤⑥-⑦
(
*2
)
: N-channel Open Drain Output (RESETB), EN Pin: Pull-Up Resistor
XD6123①②③④⑤⑥-⑦
(
*2
)
: N-channel Open Drain Output (RESETB), ENB Pin: No Pull-Down Resistor
XD6124①②③④⑤⑥-⑦
(
*2
)
: N-channel Open Drain Output (RESETB), ENB Pin: Pull-Down Resistor
DESIGNATOR
ITEM
SYMBOL
A
C
①
Release Delay Time
(*1)
D
E
F
2
3
②
Watchdog Timeout Period
4
5
6
7
③④
⑤⑥-⑦
(*3)
(*1)
DESCRIPTION
3.13ms (TYP.)
50ms (TYP.)
100ms (TYP.)
200ms (TYP.)
400ms (TYP.)
50ms (TYP.)
100ms (TYP.)
200ms (TYP.)
400ms (TYP.)
1.6s (TYP.)
800ms (TYP.)
Detect voltage
ex.) 4.5V:
③⇒4, ④⇒5
SOT-25 (3,000pcs/Reel)
(*2)
Detect Voltage
Package
(Order Unit)
16,22,23,24,29,
30,31,44,45,46
MR-Q
Please set the release delay time shorter than or equal to the watchdog timeout period.
ex.) XD6123F523MR or XD6123F623MR
For other output voltages, please contact your local Torex sales office or representative. The output voltage optional range is 1.6V to 5.0V.
(*3)
The “-Q” suffix denotes “AEC-Q100” and “Halogen and Antimony free” as well as being fully EU RoHS compliant.
(*2)
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