mic809-5suy Micrel Semiconductor, mic809-5suy Datasheet

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mic809-5suy

Manufacturer Part Number
mic809-5suy
Description
Mic809-5 Microprocessor Reset Circuit
Manufacturer
Micrel Semiconductor
Datasheet

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General Description
The MIC809-5 is a power supply supervisor that provides
under-voltage monitoring and power-on reset generation in
an industry standard 3-pin SOT package and SC-70 pack-
age. The reset output is asserted at power-on and any time
the input voltage drops below the programmed threshold. It
remains asserted for 30ms (min.) after the input subsequently
rises back above the threshold boundary. The MIC809-5 has
an active-low reset output.
The MIC809-5 is inherently immune to brief power supply
transients. Typical supply current is a low 5µA. For those
applications that require a manual reset function, see the
MIC811/812. For those applications that require a longer
reset timeout, see the MIC809/810. (The MIC809-5 is identi-
cal to the industry-standard MIC809 with the exception of a
shorter reset timeout).
Ordering Information
*Other voltages available. Contact Micrel for details. Minimum order may apply.
Typical Application
IttyBitty is a trademark of Micrel, Inc.
July 2005
MIC809-5
Part Number
MIC809-5SU
MIC809-5SBC3
MIC809-5SUY
MIC809-5SYC3
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
Marking
IX
IX
IX
IX
Application
3.3V±5%
3.3V±5%
3.3V±5%
3.3V±5%
Voltage*
Typical
MIC809-5
Threshold
VCC
Nominal
/RESET
Voltage
2.93
2.93
2.93
2.93
V
1
CC
Features
• Under-voltage monitor
• Power-on reset generation (30ms minimum)
• Choice of threshold voltages
• Active-low reset output
• No external components required
• Rejects brief input transients
• Industry standard package and pinout
• 3-pin IttyBitty™ SOT23-3 package and SC-70 package
Applications
• PDAs, hand-held PCs
• Embedded controllers
• Telecommunications systems
• Power supplies
• Wireless/cellular systems
• Networking hardware
/RESET
t
(ms)
RST
30
30
30
30
VCC
µP
Microprocessor Reset Circuit
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
Temp. Range
Operating
MIC809-5
Package
SOT23-3
SOT23-3
SC70-3
SC70-3
M9999-071305
Pb-Free
Yes
Yes
No
No
Micrel

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mic809-5suy Summary of contents

Page 1

... Part Number Marking Voltage* MIC809-5SU IX 3.3V±5% MIC809-5SBC3 IX 3.3V±5% MIC809-5SUY IX 3.3V±5% MIC809-5SYC3 IX 3.3V±5% *Other voltages available. Contact Micrel for details. Minimum order may apply. Typical Application IttyBitty is a trademark of Micrel, Inc. Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com ...

Page 2

... MIC809-5 Pin Configuration Pin Description Pin Number Pin Name 1 GND 2 /RESET 3 VCC M9999-071305 MIC809-5 GND 1 3 VCC /RESET 2 3-Lead SOT23 3-Lead SC-70 Pin Function Ground return for all IC functions. Digital Output. Active-low. Asserted whenever V voltage. It will remain asserted for no less than 30ms and be de-asserted after V returns above the threshold ...

Page 3

... MIC809-5 Absolute Maximum Ratings Terminal Voltage (V ) .................................–0.3V to +6.0V CC Input Current (V ) ..................................................... 20mA CC Output Current (/RESET, RESET) .............................. 20mA Lead Temperature (soldering, 10 sec.) ...................... 300°C Storage Temperature (T ) .......................... –65°C to 150°C S Rate of Rise (V ) .................................................. 100V/µs CC (3) ESD Rating ................................................................ 3kV Electrical Characteristics For typical values 3.3V 25° ...

Page 4

... MIC809-5 Functional Diagram V CC (3) M9999-071305 + RESET GENERATOR - Reset Threshold (V) GND (1) 4 Micrel RESET (2) RESET (MIC810) July 2005 ...

Page 5

... CC always turn on sufficiently to produce a valid logic-low. In this situation, other circuits driven by /RESET could be allowed to float, causing undesired operation. (In most cases, however expected that the circuits driven by the MIC809-5 will be similarly inoperative at V =1V given application requires that /RESET be valid below ...

Page 6

... MIC809-5 Package Information 2.36 (0.093) 2.28 (0.090) 3.05 (0.120) 2.67 (0.105) 0.445 (0.0175) TYP 3 PLACES MICREL, INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 TEL The information furnished by Micrel in this datasheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. ...

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