X40021 Dual Voltage Monitor with Integrated CPU Supervisor and System Battery Switch

X40021

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Dual Voltage Monitor with Integrated CPU Supervisor and System Battery Switch

Datasheets,
Related Docs
& Simulations

Parametric
Data

Ordering Information

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Part No.

Design-In
Status

Temp.

Package

MSL

Price
US $

PB Free

X40021S14-A

InActive

Comm

1

N/A

X40021S14-AT1

InActive

Comm

1

N/A

X40021S14-B

InActive

Comm

1

N/A

X40021S14-BT1

InActive

Comm

1

N/A

X40021S14-C

InActive

Comm

1

N/A

X40021S14-CT1

InActive

Comm

1

N/A

X40021S14I-A

InActive

Ind

1

N/A

X40021S14I-AT1

InActive

Ind

1

N/A

X40021S14I-B

InActive

Ind

1

N/A

X40021S14I-BT1

InActive

Ind

1

N/A

X40021S14I-C

InActive

Ind

1

N/A

X40021S14I-CT1

InActive

Ind

1

N/A

X40021V14-A

InActive

Comm

1

N/A

X40021V14-AT1

InActive

Comm

14 Ld TSSOP T+R

1

N/A

X40021V14-B

InActive

Comm

1

N/A

X40021V14-BT1

InActive

Comm

14 Ld TSSOP T+R

1

N/A

X40021V14-C

InActive

Comm

1

N/A

X40021V14-CT1

InActive

Comm

14 Ld TSSOP T+R

1

N/A

X40021V14I-A

InActive

Ind

1

N/A

X40021V14I-AT1

InActive

Ind

14 Ld TSSOP T+R

1

N/A

X40021V14I-B

InActive

Ind

1

N/A

X40021V14I-BT1

InActive

Ind

14 Ld TSSOP T+R

1

N/A

X40021V14I-C

InActive

Ind

1

N/A

X40021V14I-CT1

InActive

Ind

14 Ld TSSOP T+R

1

N/A

The price listed is the manufacturer's suggested retail price for quantities of 1K units. However, prices in today's market are fluid and may change without notice.

MSL = Moisture Sensitivity Level - per IPC/JEDEC J-STD-020

SMD = Standard Microcircuit Drawing

Description

The X40021 combines power-on reset control, watchdog timer, supply voltage supervision, and secondary supervision, and manual reset, in one package. This combination lowers system cost, reduces board space requirements, and increases reliability.

Applying voltage to V_CC activates the power-on reset circuit which holds RESET/RESET active for a period of time. This allows the power supply and system oscillator to stabilize before the processor can execute code.

Key Features

Dual voltage detection and reset assertion
- Three standard reset threshold settings (4.6V/2.9V, 4.6V/2.6V, 2.9V/1.6V)
- V_TRIP2 programmable down to 0.9V
- Adjust low voltage reset threshold voltages using special programming sequence
- Reset signal valid to V_CC = 1V
- Monitor two voltages or detect power fail
Battery switch backup
V_OUT: 5mA to 50mA from V_CC, 250μA from V_BATT
Fault detection register
Selectable power-on reset timeout (0.05s, 0.2s, 0.4s, 0.8s)
Selectable watchdog timer interval (25ms, 200ms, 1.4s, off)
Debounced manual reset input
Low power CMOS
- 25μA typical standby current, watchdog on
- 6μA typical standby current, watchdog off
- 1μA battery current in backup mode
400kHz 2-wire interface
2.7V to 5.5V power supply operation
Available packages
- 14-lead SOIC, TSSOP
Monitor voltages: 5V to 1.6V
Memory security
Pb-free plus anneal available (RoHS compliant)

Related Documentation

Datasheet(s):
Dual Voltage Monitor with Integrated CPU Supervisor and System Battery Switch

Parametric Data


# of Voltage Monitors		2

V_S Range (V)		2.7 to 5.5 2.7 to 5.5 2.7 to 3.6

Voltage Threshold 1		4.6 (1%) 4.6 (1%) 2.9 (1.7%)

Voltage Threshold 2		2.9 (1.7%) 2.6 (2%) 1.6 (3%)

Reset Output Type		Active Low

Watchdog Timer (s)		OFF, 0.025, 0.2, 1.4

Manual Reset		Y

Bus Interface		I²C

EEPROM Size (kbits)		0

Battery Montor and Switchover		Y

Fault Detection Register		Y

Suffix		-A -B -C

POR (ms)		50, 200, 400, 800

RTC Function		N

Applications

Communications equipment
- Routers, hubs, switches
- Disk arrays
Industrial systems
- Process control
- Intelligent instrumentation
Computer systems
- Desktop computers
- Network servers

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