SMR100

T H I S P R O D U C T H A S R E A C H E D E N D O F L I F E

© SUMMIT Microelectronics, Inc.

2004 · 1717 Fox Drive · San Jose CA 95131 · Phone 408 436-9890 · FAX 408 436-9897

The Summit Web Site can be accessed by "right" or "left" mouse clicking on the link:

http://www.summitmicro.com/

2076 1.6 06/30/04

FEATURES & APPLICATIONS

· De-Bounced Reset Input with up to 40 Second

Programmable Delay Time

· External Push-Button Control Provides a

Reliable End-User System Reset Function

· Reset Signal at 3.0V with a Programmable

Timeout Period

· Brownout Warning Signal whenever the supply

dips below 3.1V

· Programmable Glitch Filtering of Brownout

Warning (BAD_PWR#) and Reset Function

· 8 Pin SOIC Package
· 6 ball Ultra CSP

(Chip-Scale) Package

Applications

· Satellite and Cable-TV Set-top box
· Handheld PCs, Cameras, Camcorders, PDAs
· Security/Medical Alert Systems

INTRODUCTION

The SMR100 programmable reset controller is
designed for consumer applications specified by
Satellite-TV set-top box standards. The SMR100
provides a satellite box controller solution during initial
setup, changing programming cards and/or system
reset needs without removing power. The part can
accommodate a long-delay hold down of an external
reset push-button using an internal programmable de-
bounced timer. The part is factory programmed,
however, multiplexed programming pins are also
provided for in-system programming for prototype
purposes.
The required hold down time is programmable from
0.325 to 40 Sec with an internal on-chip oscillator.
Accurate warning of a 3.1V brownout condition
(BAD_PWR#), and a programmable reset
(RESET_OUT#) timeout period when the VDD supply
pin reaches 3.0V are also provided. During a reset
(RESET_OUT#), the part enables the "BAD_PWR#" or
brownout warning output until the reset has cleared. A
programmable glitch filter avoids nuisance tripping of
the internal comparators.

SIMPLIFIED APPLICATIONS DRAWING

FILT_CAP

TRIM_C

SMR100

3.3V

VDD

RESET_IN#

RESET_OUT#

BAD_PWR#

0.1

µf

ASIC

µP

Manual

Reset

Switch

Figure 1 Applications Schematic using the SMR100 to supervise the supply to digital components. As
shown, the SMR100 is designed to use a minimum of external components.

Programmable Long-Delay Push-Button Reset Controller for Consumer Equipment

SMR100

Preliminary Information

Summit Microelectronics, Inc

2076 1.6 06/30/04

GENERAL DESCRIPTION

The SMR100 is a programmable Reset Controller for
Consumer Equipment used to monitor the power
supply in µP and digital systems. It provides excellent
circuit reliability and low cost by eliminating external
components and adjustments when used with +3.3V
powered circuits. The device performs several
functions: it first asserts a `bad power' signal and then
a reset signal whenever the VDD supply voltage
declines below two preset thresholds, keeping it
asserted for a programmable time period after VDD
has risen above the reset threshold. The part also
provides a programmable delay push button input for
manual system reset.
The open-drain RESET_OUT# and BAD_PWR#
outputs have on-chip 100K pull-up resistors and do not
require external pull-up resistors unless more drive
current is needed (see figure 3). The RESET_OUT#
and BAD_PWR# comparators are designed to ignore
fast transients on VDD, and the outputs are
guaranteed to be in the correct logic state for VDD
down to 1V. Low supply current makes the SMR100
ideal for use in portable equipment. The RESET_IN#
input includes a programmable hold-down delay timer
for use with a push button switch for consumer
equipment such as set-top boxes and PCs.
A microprocessor's (µP's) reset input starts the µP in a
known state. The SMR100 asserts a reset to prevent

code -execution errors during power-up, power-down,
or UnderVoltage (UV) conditions. It asserts a
RESET_OUT# signal whenever the VDD supply
voltage declines below a 3.0V threshold, keeping it
asserted for a programmable period after VDD has
risen above the reset threshold. It also asserts a Bad
Power signal to warn of an impending reset or
brownout condition to allow time for the system to
save data before a reset occurs. The BAD_PWR#
signal is also asserted whenever RESET_OUT# is
asserted to prevent erroneous or false Bad Power
warnings during initial turn-on.
In addition to issuing a reset to the µP during power-
up, power-down, and brownout conditions, the
SMR100 is immune to short-duration VDD transients
(glitches) due to a programmable glitch filter. Typically,
a VDD transient of 100mV less than the reset
threshold and lasting for a duration less than the
programmed glitch filter setting will not cause a reset
pulse. A 0.1µF bypass capacitor mounted as close as
possible to the VDD pin provides additional transient
immunity. Since the BAD_PWR# and RESET_OUT#
outputs are open drain, the device interfaces easily
with µPs that have bidirectional-reset pins. Connecting
the RESET_OUT# output directly to the µP's RESET
pin allows either the µP or the SMR100 to assert a
reset.

VDD

RESET_OUT#

BAD_PWR#

RESET_IN#

Push-Button

Input

RESET

RESET_HD

RESET

3.1V

3.0V

GLITCH

Push-Button

Released

Figure 2 SMR100 Operation and timing diagram

SMR100

Preliminary Information

Summit Microelectronics, Inc

2076 1.6 06/30/04

8 KHz

Ring

Oscillator,

+/-10%

accurate

Programmable Delay Generator/

Logic

Up Count

MSB

RESET_OUT

at 3.0V

Programmable

Hold-Down Time,

0.3125 to 40Sec

VDD

GND

User Reset

Pushbutton

1.25V

Vref

Programmable

Duration Glitch Filter

r
ogra

mmable

Dura

tion Re

tput

Reset

User Reset

Programmable

Duration Glitch Filter

RESET _IN#

RESET_OUT#

BAD_PWR#

3.3V

BAD_PWR

at 3.1V

100k

PROG

Figure 3 SMR100 Controller Internal Block Diagram.

INTERNAL BLOCK DIAGRAM

SMR100

Preliminary Information

Summit Microelectronics, Inc

2076 1.6 06/30/04

PACKAGE AND PIN CONFIGURATION

RESET_IN#

VDD

RESET_OUT#

GND

PROG

A1 A2

C1 C2

BAD_PWR#

PROG

RESET_IN#

GND

VDD

BAD_PWR#

RESET_OUT#

PIN DESCRIPTIONS

CSP

Pin

Number

SOIC

Pin

Number

Pin

Type

Pin Name

Pin Description

1 I

PROG

High voltage programming pin. Set to 12V in programming
mode. Connected to ground if not used.

8 PWR

VDD

Positive supply voltage.

4 PWR

GND

Ground pin.

5 O

RESET_OUT# Open Drain active low Reset Out indicator. Internally connected

to VDD through a 100K

resistor.

3 I

RESET_IN#

De-bounced push button switch input. Internally connected to
VDD through a 100K

resistor. Also used as the Data input

programming pin when the PROG pin is set to 12V.

6 O

BAD_PWR#

Open Drain active low Bad Power indicator. Internally
connected to VDD through a 100K

resistor.

2,7 NC

No Connect

6 Ball Ultra CSP

Bottom View

8 Pin SOIC

Top View

SMR100

Preliminary Information

Summit Microelectronics, Inc

2076 1.6 06/30/04

ABSOLUTE MAXIMUM RATINGS

Temperature Under Bias ......................-55

C to 125

Storage Temperature............................-65

C to 125

Terminal Voltage with Respect to GND:

........................................-0.3V to 6.0V

PROG, RESET_IN#................-0.3V to 16.0V

All Others.................................VDD + 0.7V

Output Short Circuit Current .................. 100mA

Reflow Solder Temperature (30 secs)................ 240

ESD Rating per JEDEC.................................2000V
Latch-Up testing per JEDEC........................

±100mA

Note - The device is not guaranteed to function outside its operating
rating. Stresses listed under Absolute Maximum Ratings may cause
permanent damage to the device. These are stress ratings only and
functional operation of the device at these or any other conditions
outside those listed in the operational sections of the specification is
not implied. Exposure to any absolute maximum rating for extended
periods may affect device performance and reliability. Devices are
ESD sensitive. Handling precautions are recommended.

RECOMMENDED OPERATING CONDITIONS

Temperature Range (Commercial)..........5

C to +70

Supply Voltage......................................3.3V +/-10%

Programming Supply Voltage..................12.0V +/-10%

Note 1 The device can operate over a supply range of
2.7V to 5.5V.

Package Thermal Resistance (

)

8 Pin SOIC................................................23

C/W

6 Ball Ultra

CSP

....................................TBD

C/W

Moisture Classification Level 1 (MSL 1) per J-STD- 020

RELIABILITY CHARACTERISTICS
Data Retention........................................100 Years
Endurance......................................100,000 Cycles

DC OPERATING CHARACTERISTICS

(Over recommended operating conditions, unless otherwise noted. All voltages are relative to GND.)

Symbol Parameter

Notes

Min.

Typ.

Max

Unit

Supply Voltage Range

2.7

3.3

5.5

PROG

Programming Supply Voltage Range

10.0

12.0

15.0

Reset

Threshold

2.95

3.0 3.05 V

BPT

Bad Power Warning Threshold

3.05

3.1

3.15

Power Supply Current

VDD = 3.3V, no
RESET_OUT# in
progress

100

200

µA

Input High Voltage

VDD = 3.3V 0.9xVDD

VDD

Input Low Voltage

VDD = 3.3V

0.1xVDD

Programmable Active High or Low
Open Drain Outputs (RESET_OUT#,
BAD_PWR#)

ISINK = 1mA

0.4

Output Low Current

0 1.0

SMR100

Preliminary Information

Summit Microelectronics, Inc

2076 1.6 06/30/04

AC OPERATING CHARACTERISTICS

(Over recommended operating conditions, unless otherwise noted. All voltages are relative to GND.)

Symbol Parameter

Notes Min.

Typ.

Max

Unit

0.8 1 1.2

20 25 30

80 100 120

RESET_OUT

Reset Timeout period

Programmed Default = 25ms

160 200 240 ms

3 4 5

µs

4.5 6 7.5

µs

7.5 10 12.5

µs

GLITCH

Programmable glitch filter times

Programmed Default = 4

µs

13.5 18 22.5

µs

0.26 0.325 0.39 s

0.5 0.625 0.75 s

1 1.25

1.5 s

2 2.5 3 s

4 5 6

8 10 12

16 20 24 s

RESET_HD

Programmable Reset Hold-Down
Delay times

Programmed Default = 10s

32 40 48 s

SMR100

Preliminary Information

Summit Microelectronics, Inc

2076 1.6 06/30/04

PART MARKING

SMR100S

AYYWW

Pin 1

Identifier

Annn

Summit Part Number

Date Code (YYWW)

Part Number suffix
(Contains Customer specific
ordering requirements)

Lot tracking code (Summit use)

Drawing

not to scale

Status Tracking Code
(Blank, MS, ES, 01, 02,...)
(Summit Use)

Product Tracking Code
(Summit use)

SUMMIT

ORDERING INFORMATION

The default device ordering number is SMR100E-100 and is programmed as described in the AC Operating
Characteristics table on page 6 and tested over the commercial temperature range.

NOTICE

NOTE 1 - This is a Preliminary Information data sheet that describes a Summit product currently in pre-production with limited characterization.

Revision 1.6 - This document supersedes all previous versions. Data Sheet updates can be accessed by "right" or "left" mouse clicking on the link:

http://www.summitmicro.com/

Device Errata sheets can be accessed by "right" or "left" mouse clicking on the link:

http://www.summitmicro.com/errata/

SUMMIT Microelectronics, Inc. reserves the right to make changes to the products contained in this publication in order to improve design,
performance or reliability. SUMMIT Microelectronics, Inc. assumes no responsibility for the use of any circuits described herein, conveys no license
under any patent or other right, and makes no representation that the circuits are free of patent infringement. Charts and schedules contained
herein reflect representative operating parameters, and may vary depending upon a user's specific application. While the information in this
publication has been carefully checked, SUMMIT Microelectronics, Inc. shall not be liable for any damages arising as a result of any error or
omission.
SUMMIT Microelectronics, Inc. does not recommend the use of any of its products in life support or aviation applications where the failure or
malfunction of the product can reasonably be expected to cause any failure of either system or to significantly affect their safety or effectiveness.
Products are not authorized for use in such applications unless SUMMIT Microelectronics, Inc. receives written assurances, to its satisfaction, that:
(a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; and (c) potential liability of SUMMIT Microelectronics, Inc.
is adequately protected under the circumstances.

Programmable Analog for a Digital WorldTM

Ultra CSP

is a registered name of FlipChip International, LLC.

SMR100

Package

E = 6 Ball Ultra CSP

Summit Part Number

nnn

Part Number Suffix

Customer specific requirements are contained
in the suffix such as Hex code, Hex code
revision, etc.

S = 8 Pin SOIC

An
nn

SSYWW

Ball A1

Identifier

Part Number suffix-nnn
(Customer specific
ordering requirements)

Date Code
Y = Single digit year
(4=2004, 5=2005, etc)

Drawing

not to scale

Product Tracking
Code (Summit use)

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: SMR100E

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: SMR100E