3PEAK TPV706 Low Voltage Supervisory Circuits with Power Fail Detector Owner's Manual

The TPV706 is a supervisory circuit to monitor power supply voltage levels and provides a power-on reset signal.
A watchdog monitor is provided, which is activated if the watchdog input doesn’t toggle within 1.6 sec.
A reset signal can be asserted by an external manual reset input.
In addition, there is a power-fail detector with a 1.25-V threshold, which can be used to monitor an additional power supply.
The reset periods are fixed at 200-ms (typical). The TPV706 is available in an 8-pin SOP package and typically consumes only 4-μA, which is suitable for low-power and portable applications.

Typical Application Circuit

Product Family Table

Order Number	Threshold Voltage (VTH)	Package Marking	Package
TPV706VL1-SR (1)	1.58	V6V	SOP8
TPV706WL1-SR (1)	1.67	V6W	SOP8
TPV706YL1-SR (1)	2.19	V6Y	SOP8
TPV706ZL1-SR (1)	2.32	V6Z	SOP8
TPV706RL1-SR	2.63	V6R	SOP8
TPV706SL1-SR	2.93	V6S	SOP8
TPV706TL1-SR	3.08	V6T	SOP8
TPV706ML1-SR	4.38	V6M	SOP8
TPV706LL1-SR	4.63	V6L	SOP8

(1) For future products, contact the 3PEAK factory for more information and samples.

Revision History

Date	Revision	Notes
2019-01-01	Rev.A.1	Initial version.
2019-05-28	Rev.A.2	Added WDI pulse interval spec.
2022-06-25	Rev.A.3	Updated note for MR input pulse width, update to latest datasheet format and add WDI to /WDO time information.
2022-08-29	Rev.A.4	Added WDI pulse interval spec.
2023-08-15	Rev.A.5	Added package tape and reel information, and updated datasheet format.
2024-07-09	Rev.A.6	Corrected typo in order information, corrected typo in typical application circuit.

Pin Configuration and Functions

Table 1. Pin Functions: TPV706

Pin		I/O	Description
No.	Name	I/O	Description
1	MR	I	Manual Reset Input. MR low asserts RESET pin. It features an internal pull-up current.
2	VCC	P	Power supply voltage being monitored.
3	GND	G	Ground. This pin should be connected to ground reference.
4	PFI	I	Power fail input. When PFI is less than 1.25-V, PFO goes low. If unused, connect PFI to GND.
5	PFO	O	Power fail output. It goes low when PFI is less than 1.25-V, otherwise stays high.
6	WDI	I	Watchdog Input. Generates a reset if the voltage on the pin remains low or high for the duration of the watchdog timeout. The timer is cleared if a logic transition occurs on this pin or if a reset is generated. Floating WDI disables the watchdog function.
7	RESET	O	Active-Low Reset Push-Pull Output Stage. Asserted whenever VCC is below the reset threshold or by a low signal on the MR input. It remains low for 200-ms after VCC goes above the reset threshold or MR goes from low to high. A watchdog timeout does not trigger RESET.
8	WDO	O	Watchdog Output. Pulls low if WDI remains low or high for the duration of the watchdog timeout, and does not go high again until the watchdog is cleared. Whenever VCC is below the reset threshold, WDO stays low. As soon as VCC rises above the reset threshold, WDO goes high with no delay.

Specifications

Absolute Maximum Ratings

Parameter		Min	Max	Unit
VCC	Power Supply	−0.3	6	V
	Output Current		20	mA
TJ	Maximum Junction Temperature		150	°C
TA	Operating Temperature Range	−40	125	°C
TSTG	Storage Temperature Range	−65	150	°C
TL	Lead Temperature (Soldering 10 sec)		260	°C

Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime.
This data was taken with the JEDEC low effective thermal conductivity test board.

This data was taken with the JEDEC standard multilayer test boards.

ESD, Electrostatic Discharge Protection

Parameter		Condition	Minimum Level	Unit
HBM	Human Body Model ESD	ANSI/ESDA/JEDEC JS-001 (1)	4	kV
CDM	Charged Device Model ESD	ANSI/ESDA/JEDEC JS-002 (2)	2	kV

JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

Thermal Information

Package Type	θJA	θJC	Unit
SOP8	143	60	°C/W

Electrical Characteristics
All test conditions: VCC = 1.53 V to 5.5 V, TA = −40°C to 125°C, unless otherwise noted.

Parameter		Conditions	Min	Typ	Max	Unit
Supply Voltage and Current
VCC	Operating Supply Voltage		1		5.5	V
ICC	Supply Current	WDI and MR unconnected (VCC = 1.8 V)		4	15	μA
ICC	Supply Current	WDI and MR unconnected (VCC = 5 V)		6	20	μA
VTH	Reset Threshold Voltage	TPV706V	1.51	1.58	1.63	V
		TPV706W	1.62	1.67	1.71	V
		TPV706Y	2.12	2.19	2.25	V
		TPV706Z	2.25	2.32	2.38	V
		TPV706R	2.55	2.63	2.70	V
		TPV706S	2.82	2.93	3.00	V
		TPV706T	3.00	3.08	3.15	V
		TPV706M	4.25	4.38	4.5	V
		TPV706L	4.5	4.63	4.75	V
	Reset Threshold Temperature Coefficient			80		ppm/°C
VHYS	Reset Threshold Hysteresis			2 × VTH 1000		mV
tRD	VCC to Reset Delay			20		μs
tRP	Reset Timeout Period		140	200	280	ms
VOL	Reset Output Voltage Low (Push- Pull)	VCC ≥ 1 V, ISINK = 50 μA			0.3	V
VOL	Reset Output Voltage Low (Push- Pull)	ISINK = 1.2 mA @ Vcc ≥ 2 V			0.4	V
VOH	Reset Output Voltage High (Push-Pull)	ISOURCE = 800 μA, @ VCC≥ 5 V	0.7 × VCC			V
MR Pin
VIL_MR	MR Input Threshold VIL				0.3 × VCC	V
VIH_MR	MR Input Threshold VIH		0.7 × VCC			V
tPW_MR	MR Input Pulse Width (1)		6			μs
tGR_MR	MR Glitch Rejection			100		ns
td_MR	MR to Reset Delay			1	6	μs
IMR_V0	MR Pull-up Current	VCC = 3V		80		μA
tWD	Watchdog Timeout Period		1	1.6	2.4	sec

Parameter		Conditions	Min	Typ	Max	Unit
tPW_WD	WDI Pulse Width 50 ns		50			ns
Parameter		Conditions	Min	Typ	Max	Unit
VIL_WDI	WDI input threshold VIL				0.3 × VCC	V
VIH_WDI	WDI input threshold VIH		0.7 × VCC			V
IWDI	WDI input current	VWDI = VCC		20		μA
IWDI	WDI input current	VWDI = 0		-15		μA
VOL_WDO	WDO VOL	ISINK = 1.2 mA @ VCC ≥ 5 V			0.4	V
VOH_WDO	WDO VOH	ISOURCE = 800 μA @ Vcc≥ 5 V	0.7 x VCC			V
PFI and PFO
VTH_PFI	Power fail input threshold	PFI falling	1.18	1.25	1.32	V
VOL_PFO	PFO VOL	ISINK = 1.6 mA @ VCC ≥ 5 V			0.4	V
VOH_PFO	PFO VOH	ISOURCE = 800 μA @ VCC ≥ 5 V	0.7 x VCC			V

(1) MR pulse width given by customer in application should be longer than minimum value of MR input pulse width requirement.

Typical Performance Characteristics
All test conditions: VCC = 5 V, TA = + 25°C, unless otherwise noted.

Detailed Description

Overview
The TPV706 provides supply voltage supervision, watchdog function, manual reset function, as well as a 1.25-V power-fail comparator.
Functional Block Diagram

Feature Description
RESET Output
The TPV706 features an active-low push-pull output. The reset signal is guaranteed to be logic low for VCC down to 1-V. The reset output is asserted when VCC is below the reset threshold (VTH), or when MR is driven low. Reset remains asserted for the duration of the reset active timeout period (tRP) after VCC rises above the reset threshold, or after MR transitions from low to high. Figure 13 shows the reset (active low) outputs.

Manual RESET Input
The TPV706 features a manual reset input (MR), which, when driven low, asserts the reset output. When MR transitions from low to high, reset remains asserted for the duration of the reset active timeout period before de-asserting.
The MR input has an internal pull-up current so that the input is always high when unconnected. Noise immunity is provided on the MR input, and the fast and negative-going transients are ignored. A 0.1-μF capacitor between MR and ground provides additional noise immunity.
Watchdog Input
The TPV706 features a watchdog timer, which monitors microprocessor activity. A timer circuit is cleared with every low-tohigh or high-to-low logic transition on the watchdog input pin (WDI). If the timer counts through the preset watchdog timeout period (tWD), the watchdog output (WDO) goes low, a low to high or high to low transition on the WDI pin clears the watchdog timer. The delay time from WDI toggling to WDO going high is within 35-ms. The microprocessor is required to toggle the WDI pin to avoid being reset. Whenever VCC is below the reset threshold, WDO stays low. As soon as VCC rises above the reset threshold, WDO goes high with no delay. Figure 14 shows the watchdog timing.

Power-Fail Detector
The power-fail detector is a 1.25-V comparator, which can monitor an external power supply through a resistive divider. When the voltage on the PFI is lower than 1.25-V, the comparator output goes low, indicating a power fail, which can be used as an early warning of the power fail.

Application and Implementation

Note
Information in the following application sections is not part of the 3PEAK’s component specification and 3PEAK does not warrant its accuracy or completeness. 3PEAK’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.

Application Information
Figure 15 shows the typical application circuit of TPV706. Microprocessor activity is monitored using WDI. When the WDI remains low or high for the duration of the watchdog timeout, the WDO will trigger a manual reset to MCU. The MCU can drive the MR from high to low and trigger the RESET.

Tape and Reel Information

Order Number	Package	Di (mm)	WI (mm)	AO (mm)	BO (mm)	KO (mm)	PO (mm)	WO (mm)	Pint Quadrant
TPV706xx-SR	SOPS	330	18.	7.	5.	2	8	12	1

Package Outline Dimensions

SOP8
Package Outline Dimensions SO1(SOP08-A)

Order Information

Order Number	Operating Temperature Range	Package	Marking Information	MSL	Transport Media, Quantity	Eco Plan
TPV706VL1-SR (1)	−40 to 125°C	SOP8	V6V	1	Tape and Reel, 4000	Green
TPV706WL1-SR (1)	−40 to 125°C	SOP8	V6W	1	Tape and Reel, 4000	Green
TPV706YL1-SR (1)	−40 to 125°C	SOP8	V6Y	1	Tape and Reel, 4000	Green
TPV706ZL1-SR (1)	−40 to 125°C	SOP8	V6Z	1	Tape and Reel, 4000	Green
TPV706RL1-SR	−40 to 125°C	SOP8	V6R	1	Tape and Reel, 4000	Green
TPV706SL1-SR	−40 to 125°C	SOP8	V6S	1	Tape and Reel, 4000	Green
TPV706TL1-SR	−40 to 125°C	SOP8	V6T	1	Tape and Reel, 4000	Green
TPV706ML1-SR	−40 to 125°C	SOP8	V6M	1	Tape and Reel, 4000	Green
TPV706LL1-SR	−40 to 125°C	SOP8	V6L	1	Tape and Reel, 4000	Green

(1) For future products, contact the 3PEAK factory for more information and samples.
Green: 3PEAK defines “Green” to mean RoHS compatible and free of halogen substances.

IMPORTANT NOTICE AND DISCLAIMER

Copyright© 3PEAK 2012-2024. All rights reserved.
Trademarks. Any of the or 3PEAK trade names, trademarks, graphic marks, and domain names contained in this document /material are the property of 3PEAK. You may NOT reproduce, modify, publish, transmit or distribute any Trademark without the prior written consent of 3PEAK.
Performance Information. Performance tests or performance range contained in this document/material are either results of design simulation or actual tests conducted under designated testing environment. Any variation in testing environment or simulation environment, including but not limited to testing method, testing process or testing temperature, may affect actual performance of the product.
Disclaimer. 3PEAK provides technical and reliability data (including data sheets), design resources (including reference designs), application or other design recommendations, networking tools, security information and other resources “As Is”.
3PEAK makes no warranty as to the absence of defects, and makes no warranties of any kind, express or implied, including without limitation, implied warranties as to merchantability, fitness for a particular purpose or non-infringement of any thirdparty’s intellectual property rights. Unless otherwise specified in writing, products supplied by 3PEAK are not designed to be used in any life-threatening scenarios, including critical medical applications, automotive safety-critical systems, aviation, aerospace, or any situations where failure could result in bodily harm, loss of life, or significant property damage. 3PEAK disclaims all liability for any such unauthorized use.

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GA20230801A6

Documents / Resources

3PEAK TPV706 Low Voltage Supervisory Circuits with Power Fail Detector [pdf] Owner's Manual
TPV706 Low Voltage Supervisory Circuits with Power Fail Detector, TPV706, Low Voltage Supervisory Circuits with Power Fail Detector, Circuits with Power Fail Detector, with Power Fail Detector, Fail Detector, Detector

References

User Manual

Features

Applications

Description