SS811 SSC [Silicon Standard Corp.], SS811 Datasheet

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SS811

Manufacturer Part Number
SS811
Description
Reset Circuits with Manual Reset Input
Manufacturer
SSC [Silicon Standard Corp.]
Datasheet
Rev.1.01 4/06/2004
FEATURES
APPLICATIONS
TYPICAL APPLICATION CIRCUIT
Ultra-low supply current of 1 A (typ.)
Guaranteed reset valid to Vcc=0.9V
Available in two output yypes:
Power-on reset pulse width minimum 140ms
Internally fixed threshold 2.3V, 2.6V, 2. 9V, 3.1V, 4.0V,
4.4V, and 4.6V
Tight voltage threshold tolerance: 1.5%
Low profile package: SOT-23-5
l
l
l
l
Push-pull active -low (SS811)
Push-pull active -high (SS812)
Notebook Computers
Digital Still Cameras
PDAs
Critical Microprocessor Monitoring
V
CC
www.SiliconStandard.com
Pushbutton
Switch
MR
Reset Circuits with Manual Reset Input
(SS812)
SS811
VCC
GND
(RESET)
RESET
DESCRIPTION
The SS811 and SS812 are low-power microprocessor
(µP ) supervisory circuits used to monitor power supplies
in µP and digital systems. They improve circuit reliability
and reduce cost by eliminating external components.
The SS811 and SS812 also offer a manual reset input.
These devices perform as valid singles in applications
with Vcc ranging from 6.0V down to 0.9V. The reset
signal lasts for a minimum period of 140ms whenever the
V
the SS811 and SS812 were designed with a reset
comparator to help identify invalid signals lasting less
than 140ms. The only difference between the SS811 and
the SS812 is that one has an active -low RESET output
and the other has an active -high RESET output .
A l o w supply current (1 A) makes the SS811 and
SS812 ideal for portable equipment. The devices are
available in a SOT-23-5 package.
CC
RESET
INPUT
supply voltage falls below a preset threshold. Both
VCC
GND
P
SS811, SS812
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Related parts for SS811

SS811 Summary of contents

Page 1

... The only difference between the SS811 and the SS812 is that one has an active -low RESET output and the other has an active -high RESET output . supply current (1 A) makes the SS811 and SS812 ideal for portable equipment. The devices are available in a SOT-23-5 package. ...

Page 2

... SSC.) Example: SS811 -31C VTR à 3.1V version in SOT- 23- 5 package, shipped in tape and reel. SOT -23-5 Marking Part No. Marking ...

Page 3

... Note1: Any stress beyond the Absolute Maximum Ratings above may cause permanent damage to the device. TEST CIRCUIT Rev.1.01 4/06/2004 = + GND 5 VCC 2 Iin RESET SS811 Pushbutton Switch www.SiliconStandard.com SS811, SS812 -0.3V ~6.5V -0.3V ~ (VCC+0.3V) 20mA 20mA 320mW - 150 C 260 C Vin ...

Page 4

... MR Input Threshold MR Pull-Up Resistance RESET Output Voltage RESET Output Voltage Note2: RESET output is for the SS811; RESET output is for the SS812. Note3: Specifications for operating temperature ranges from - are guaranteed by Statistical Quality Controls (SQC), with no production testing. Rev.1.01 4/06/2004 ...

Page 5

... Fig 4 Power-Down Reset Delay vs. Temperature 600 500 400 300 V =3.1V TH 200 =2.3V TH 100 100 -60 Fig 6 Power-Up Reset Timeout vs. Temperature www.SiliconStandard.com SS811, SS812 V =2. =50mV OD V =100mV OD V =200mV OD -40 - Temperature ( ...

Page 6

... VCC returns above the reset threshold, and RESET remains low for the reset timeout period. The manual reset input ( MR ) can also initiate a reset. The SS812 has an active-high RESET output that is the inverse of the SS811’s RESET output. www.SiliconStandard.com SS811, SS812 RESET (RESET) ...

Page 7

... BIDIRECTIONAL RESET PINS Microprocessors with bidirectional res et pins may have contention with the SS811/812 reset outputs. If the SS811 RESET output is asserted high and the microprocessor wants to pull it low, indeterminate logic levels may occur. To correct such cases, connect a resistor between the SS811 RESET (or SS812 RESET) output and the microprocessor reset I/O ...

Page 8

... Silicon Standard Corporation or any third parties. Rev.1.01 4/06/2004 C SYMBOL www.SiliconStandard.com SS811, SS812 MIN MAX 1.00 1.30 — 0.10 0.70 0.90 0.35 0.50 0.10 0.25 2.70 3.10 1.40 1.80 1.90 (TYP) 2.60 3.00 0.37 — ...

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