Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsPMICsPMIC - system monitor Reset/power-on reset SOT 23-3

 2001-2012 Microchip Technology Inc. DS21661E-page 1

TCM809/TCM810

Features

• Precision V

Monitor for 2.5V, 3.0V, 3.3V, 5.0V

Nominal System Voltage Supplies

• 140 msec Minimum RESET Time-Out Period

• RESET Output to V

= 1.0V (TCM809)

• Low Supply Current, 9 µA (typ.)

•V

Transient Immunity

• Small 3-Pin SC-70 and SOT-23B Packages

• No External Components

• Push-Pull RESET Output

• Temperature Ranges:

- Industrial: SC-70 (E): -40C to +85C

- Extended: SOT-23, SC-70 (V): -40C to +125C

Applications

• Computers

• Embedded Systems

• Battery-powered Equipment

• Critical Microcontroller Power Supply Monitoring

• Automotive

Typical Application Circuit

General Description

The TCM809 and TCM810 are cost-effective system

supervisor circuits designed to monitor V

in digital

systems; providing a reset signal to the host processor,

when necessary. No external components are

required.

The RESET output is typically driven active within

65 µsec of V

falling through the reset voltage thresh-

old. RESET is maintained active for a minimum of

140 msec after V

rises above the reset threshold.

The TCM810 has an active-high RESET output, while

the TCM809 has an active-low RESET output. The

output of the TCM809/TCM810 is valid down to

= 1V. Both devices are available in 3-Pin SC-70

and SOT-23B packages.

The TCM809/TCM810 are optimized to reject fast

transient glitches on the V

line. A low supply current

of 9 µA (typ., V

= 3.3V) make these devices suitable

for battery-powered applications.

Pin Configurations

TCM809

RESET

INPUT

(Active-Low)

GND

PIC

Microcontroller

SOT-23B/SC-70

Note: 3-Pin SOT-23B is equivalent to

TCM809 RESET

GND

TCM809/

TCM810

TCM810 (RESET)

JEDEC TO-236.

3-Pin Microcontroller Reset Monitors

Summary of content (16 pages)

PAGE 1
TCM809/TCM810 3-Pin Microcontroller Reset Monitors Features General Description • Precision VDD Monitor for 2.5V, 3.0V, 3.3V, 5.0V Nominal System Voltage Supplies • 140 msec Minimum RESET Time-Out Period • RESET Output to VDD = 1.0V (TCM809) • Low Supply Current, 9 µA (typ.
PAGE 2
TCM809/TCM810 1.0 ELECTRICAL CHARACTERISTICS † Notice: Stresses above those listed under “Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability. Absolute Maximum Ratings† Supply Voltage (VDD to GND) ...........................
PAGE 3
TCM809/TCM810 2.0 TYPICAL PERFORMANCE CHARACTERISTICS Note: The graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. The performance characteristics listed herein are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
PAGE 4
TCM809/TCM810 3.0 PIN DESCRIPTIONS The descriptions of the pins are given in Table 3-1. TABLE 3-1: PIN FUNCTION TABLE NAME GND FUNCTION Ground RESET (TCM809) RESET push-pull output RESET (TCM810) RESET push-pull output VDD 3.1 Supply voltage (+2.5V, +3.0V, +3.3V, +5.0V). Ground (GND) Ground terminal. 3.2 RESET Output (TCM809) The RESET push-pull output remains low while VDD is below the reset voltage threshold, and for 240 msec (140 msec min.) after VDD rises above reset threshold. 3.
PAGE 5
TCM809/TCM810 4.0 APPLICATIONS INFORMATION 4.1 VDD Transient Rejection The TCM809/TCM810 provides accurate VDD monitoring and reset timing during power-up, power-down and brown-out/sag conditions. These devices also reject negative-going transients (glitches) on the power supply line. Figure 4-1 shows the maximum transient duration vs. maximum negative excursion (overdrive) for glitch rejection. Any combination of duration and overdrive that lies under the curve will not generate a reset signal.
PAGE 6
TCM809/TCM810 4.3 Controllers and Processors With Bidirectional I/O Pins Some microcontrollers have bidirectional reset pins. Depending on the current drive capability of the controller pin, an indeterminate logic level may result if there is a logic conflict. This can be avoided by adding a 4.7 k resistor in series with the output of the TCM809/ TCM810 (Figure 4-3). If there are other components in the system that require a reset signal, they should be buffered so as not to load the reset line.
PAGE 7
TCM809/TCM810 5.0 PACKAGING INFORMATION 5.
PAGE 8
TCM809/TCM810 3-Lead Plastic Small Outline Transistor (NB) (SOT-23) Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.
PAGE 9
TCM809/TCM810 3-Lead Plastic Small Outline Transistor (LB) (SC-70) Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.
PAGE 10
TCM809/TCM810 5.2 Product Tape and Reel Specifications FIGURE 5-1: EMBOSSED CARRIER DIMENSIONS (8, 12, 16 AND 24 MM TAPE ONLY) Top Cover Tape A0 W B0 K0 P TABLE 1: CARRIER TAPE/CAVITY DIMENSIONS Case Outline Carrier Dimensions Package Type W mm Cavity Dimensions P mm A0 mm B0 mm K0 mm Output Quantity Units Reel Diameter in mm NB SOT-23 3L 8 4 3.15 2.77 1.22 3000 180 LB SC-70 3L 8 4 2.4 2.4 1.
PAGE 11
TCM809/TCM810 APPENDIX A: REVISION HISTORY Revision E (December 2012) • Added a note to each package outline drawing. Revision D (March 2005) • Updated 6.0 “Packaging Information” to include old and new packaging examples. • Applied new template and rearranged sections to be consistent with current documentation. Revision C (April 2004) Revision B (January 2002) Revision A (May 2001) Initial release of data sheet.  2001-2012 Microchip Technology Inc.
PAGE 12
TCM809/TCM810 NOTES: DS21661E-page 12 Confidential  2001-2012 Microchip Technology Inc.
PAGE 13
TCM809/TCM810 PRODUCT IDENTIFICATION SYSTEM To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office. PART NO.
PAGE 14
TCM809/TCM810 NOTES: DS21661E-page 14  2001-2012 Microchip Technology Inc.
PAGE 15
Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature.
PAGE 16
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