MIC2787-YHYMT MICREL [Micrel Semiconductor], MIC2787-YHYMT Datasheet

MIC2787-YHYMT

Manufacturer Part Number

MIC2787-YHYMT

Description

Push-Button Reset IC with Voltage Supervisor

Manufacturer

MICREL [Micrel Semiconductor]

Datasheet

1.MIC2787-YHYMT.pdf (17 pages)

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General Description

The MIC2786/MIC2787 are low-current, ultra-small, push-

button supervisor reset ICs with an integrated supply

voltage monitor. The device features two manual reset

inputs and two reset outputs. The reset outputs are

asserted and held when the supply voltage decreases

below the factory programmed threshold voltage. Reset

will be asserted for the reset timeout delay once the supply

voltage increases above the rising threshold voltage or

when both manual reset inputs are asserted low for longer

than the setup delay time.

The MIC2786 features integrated pull-up resistors on the

/MR0 and /MR1 inputs, while the MIC2787 requires

external pull-up resistors. The PDY input pin selects

between a 2s, 4s or 6s setup period. Factory-programmed

reset timeout delays of 140ms (min.) and 240ms (min.) are

available. An active-low, open-drain reset output (/RST)

and an active-high, push-pull reset output (RSTP) provide

flexibility when interfacing to various microcontrollers,

PMICs, or load switches.

The MIC2786/MIC2787 consume a quiescent current of

only 7.4µA and are offered in a tiny, space saving 8-pin

Thin MLF

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

Typical Application

October 2011

_________________________________________________________________________________________________________________________

MLF and MicroLeadFrame are registered trademarks of Amkor Technologies, Inc.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 •

(2mm x 2mm x 0.55mm) package.

Features

• 1.6V to 5.5V operating voltage

• 7.4µA supply current when /MR0, /MR1 not asserted

• 1.66V to 4.63V preset voltage threshold options

• 2.5% voltage threshold accuracy over temperature

• Asserting /MR0 and /MR1 for the setup delay time

• Programmable delay (PDY) input selects 2s, 4s or 6s

• Factory-programmed 140ms (min.) or 240ms (min.)

• Integrated /MR0, /MR1 pull-up resistors (MIC2786)

• Dual reset outputs:

• −40°C to +85°C ambient operating temperature range

• 8-pin 2mm x 2mm x 0.55mm Thin MLF

Applications

• Smart phones

• Tablets

• Set-top boxes (STB)

asserts reset output for the reset timeout delay

setup delay

reset timeout delay

− Open-drain, active-low reset output (/RST)

− Push-pull, active-high reset output (RSTP)

Push-Button Reset IC with Voltage

MIC2786/MIC2787

Supervisor

http://www.micrel.com

M9999-102711-A

package

Related parts for MIC2787-YHYMT

MIC2787-YHYMT Summary of contents

Page 1

... The MIC2786 features integrated pull-up resistors on the /MR0 and /MR1 inputs, while the MIC2787 requires external pull-up resistors. The PDY input pin selects between a 2s setup period. Factory-programmed reset timeout delays of 140ms (min ...

Page 2

... MIC2787-YFYMT 7YF (2) MIC2787-XGYMT 7XG (2) MIC2787-YGYMT 7YG (2) MIC2787-XHYMT 7XH (2) MIC2787-YHYMT 7YH Notes: 1. All devices available in Tape and Reel only. 2. Contact Factory for availability. ® 3. Thin MLF ▲ = Pin 1 identifier. ® 4. Thin MLF is a Green RoHS-compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free. ...

Page 3

... GND Supply Ground. Active-Low Manual Reset Input. The MIC2786 has an internal 65kΩ pull-up resistor to VIN, while the MIC2787 requires an external pull-up resistor to VIN if used with a push button. Pull this pin low to 3 /MR1 assert and force a reset. Pulling both manual reset inputs low for the setup delay time causes one reset output pulse for the reset timeout delay period ...

Page 4

... MIC2786/MIC2787 Max. Units V 5.5 12.5 µA 4.718 4.741 4.463 4.484 3.137 3.152 2.984 2.998 V 2.678 2.691 2.359 2.371 2.232 2 ...

Page 5

... 1.0mA IN SINK = 4.5V 0.8mA IN SOURCE = 2.7V 0.5mA IN SOURCE = 1.6V 250μA IN SOURCE V = 5.5V /RST MIC2786 only ) /MR0, /MR1 inputs; MIC2787 only MR PDY = V , /MR0 = /MR1 = 0V IN PDY = V , /MR0 = V or /MR1 PDY = 0V, /MR0 = /MR1 = 0V PDY = 0V, /MR0 = V or /MR1 = MIC2786/MIC2787 Min. Typ. 0.5 1.0 2.0 1.6 4.0 3.2 6.0 4 ...

Page 6

... V = 3.0V IN PDY = 0V 240 230 220 210 200 -40 -15 TEMPERATURE (°C) Reset Timeout Delay (Option vs. Temperature (PDY = V IN 250 V = 3.0V IN PDY = V IN 240 230 220 210 200 -40 -15 TEMPERATURE (°C) MIC2786/MIC2787 M9999-102711-A ...

Page 7

... TEMPERATURE (°C) October 2011 Setup Delay vs. Input Voltage 10.0 8.0 6.0 4.0 2.0 0 INPUT VOLTAGE ( Reset Timeout Delay (Option X ) vs. Input Voltage 250 240 PDY = V IN 230 PDY = 0V 220 PDY = OPEN 210 200 INPUT VOLTAGE (V) MIC2786/MIC2787 M9999-102711-A ...

Page 8

... Micrel, Inc. Timing Diagram October 2011 8 MIC2786/MIC2787 M9999-102711-A ...

Page 9

... Micrel, Inc. Functional Diagram October 2011 9 MIC2786/MIC2787 M9999-102711-A ...

Page 10

... Figure possible to tie this resistor to some other voltage, other than V /RST output. The pull-up voltage must be limited to 5.5V or less to avoid damage to the MIC2786/MIC2787. The pull-up resistor must be small enough to supply current to the inputs and leakage paths that are driven by the /RST output (a recommended value is 100kΩ ...

Page 11

... V as 1.6V. The RSTP output is a compliment of the /RST output. October 2011 V The MIC2786/MIC2787 is relatively immune to small negative-going V shown in Figure 4, the overdrive voltage is the difference between the threshold voltage and the minimum point of the V duration of 20μs or less will not cause a reset. ...

Page 12

... Micrel, Inc. Typical Applications Figure 5. MIC2786/MIC2787 Used for Interrupting System Power Figure 6. MIC2786/MIC2787 Used for Microcontroller Reset October 2011 12 MIC2786/MIC2787 M9999-102711-A ...

Page 13

... GRM188R71C104KA01D R1, R2, R4 CRCW0603100KJNEA MIC2786-XDYMT U1 MIC2787-XDYMT Notes: 1. Murata Tel: www.murata.com. 2. Vishay Tel: www.vishay.com. 3. Micrel, Inc.: www.micrel.com. October 2011 Manufacturer Description (1) Murata 0.1µF, 16V capacitor, X7R, 0603 (2) Vishay 100k, 5% resistor, 0603 (3) Micrel, Inc. Push-Button Reset IC with Supply Voltage Supervisor 13 MIC2786/MIC2787 Qty M9999-102711-A ...

Page 14

... Micrel, Inc. PCB Layout Recommendations October 2011 Top Layer Top Silkscreen 14 MIC2786/MIC2787 M9999-102711-A ...

Page 15

... Micrel, Inc. PCB Layout Recommendations (Continued) October 2011 Copper Layer Bottom Silkscreen 15 MIC2786/MIC2787 M9999-102711-A ...

Page 16

... Micrel, Inc. Package Information October 2011 8-Pin 2mm × 2mm Thin MLF ® 16 MIC2786/MIC2787 M9999-102711-A ...

Page 17

... Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully October 2011 8-Pin 2mm × 2mm Thin MLF indemnify Micrel for any damages resulting from such use or sale. © 2011 Micrel, Incorporated. 17 MIC2786/MIC2787 ® http://www.micrel.com M9999-102711-A ...

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