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X40014S8I-B

Dual Voltage Monitor with Integrated CPU Supervisor

Xicor -> Intersil 

X40010/X40011/X40014/X40015 – Preliminary

threshold for either voltage monitor to be repro-

grammed to meet special needs or to fine-tune the

threshold for applications requiring higher precision.

The Watchdog Timer provides an independent protec-

tion mechanism for microcontrollers. When the micro-

controller fails to restart a timer within a selectable time

out interval, the device activates the WDO signal. The

user selects the interval from three preset values. Once

selected, the interval does not change, even after

cycling the power.

The device features a 2-wire interface and software

protocol allowing operation on an I2C® bus.

Dual Voltage Monitors

Device

X40010/11

-A

-B

-C

X40014/15

-A

-B

-C

Expected System Voltages

5V; 3V or 3.3V

5V; 3V

3V; 3.3V; 1.8V

3V; 3.3V; 1.5V

3V; 1.5V

3V or 3.3V; 1.1 or 1.2V

Vtrip1(V)

2.0–4.75*

4.55–4.65*

4.35–4.45*

2.85–2.95*

2.0–4.75*

2.85–2.95*

2.55–2.65*

2.85–2.95*

*Voltage monitor requires VCC to operation. Others are independent of VCC.

Vtrip2(V)

1.70–4.75

2.85–2.95

2.55–2.65

1.65–1.75

0.90–3.50*

1.25–1.35*

1.25–1.35*

0.95–1.05*

POR (system)

RESET = X40010

RESET = X40011

RESET = X40014

RESET = X40015

PIN CONFIGURATION

X40010/14, X40011/15

8-Pin SOIC

V2FAIL 1

V2MON 2

8 VCC

7 WDO

RESET/RESET 3

VSS 4

6 SCL

5 SDA

X40010/14, X40011/15

8-Pin TSSOP

WDO 1

VCC 2

V2FAIL 3

V2MON 4

8 SCL

7 SDA

6 VSS

5 RESET/RESET

PIN DESCRIPTION

Pin

SOIC TSSOP Name

Function

1

3 V2FAIL V2 Voltage Fail Output. This open drain output goes LOW when V2MON is less than VTRIP2 and

goes HIGH when V2MON exceeds VTRIP2. There is no power up reset delay circuitry on this pin.

2

4 V2MON V2 Voltage Monitor Input. When the V2MON input is less than the VTRIP2 voltage, V2FAIL goes

LOW. This input can monitor an unregulated power supply with an external resistor divider or can

monitor a second power supply with no external components. Connect V2MON to VSS or VCC

when not used.The V2MON comparator is supplied by V2MON (X40010/11) or by VCC Input

(X40014/15).

3

5 RESET/ RESET Output. (X40011/15) This is an active LOW, open drain output which goes active when-

RESET ever VCC falls below VTRIP1. It will remain active until VCC rises above VTRIP1 and for the tPURST

thereafter.

RESET Output. (X40010/14) This is an active HIGH CMOS output which goes active whenever

VCC falls below VTRIP1. It will remain active until VCC rises above VTRIP1 and for the tPURST there-

after.

4

6

VSS Ground

REV 1.3.4 7/12/02

www.xicor.com

Characteristics subject to change without notice. 2 of 25

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