MIC2786/MIC2787
Push-Button Reset IC with Voltage
Supervisor
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 (2mm x 2mm x 0.55mm) package.
Data sheets and support documentation can be found on
Micrel’s web site at:
www.micrel.com.
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
asserts reset output for the reset timeout delay
Programmable delay (PDY) input selects 2s, 4s or 6s
setup delay
Factory-programmed 140ms (min.) or 240ms (min.)
reset timeout delay
Integrated /MR0, /MR1 pull-up resistors (MIC2786)
Dual reset outputs:
−
Open-drain, active-low reset output (/RST)
−
Push-pull, active-high reset output (RSTP)
−40°C
to +85°C ambient operating temperature range
8-pin 2mm x 2mm x 0.55mm Thin MLF
®
package
•
•
Applications
•
Smart phones
•
Tablets
•
Set-top boxes (STB)
_________________________________________________________________________________________________________________________
Typical Application
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 •
http://www.micrel.com
October 2011
M9999-102711-A
Micrel, Inc.
MIC2786/87
Ordering Information
(1)
Part Number
MIC2786-XAYMT
MIC2786-YAYMT
(2)
MIC2786-XBYMT
(2)
MIC2786- YBYMT
(2)
MIC2786- XCYMT
(2)
MIC2786-YCYMT
(2)
Marking
6XA
6YA
6XB
6YB
6XC
6YC
6XD
6YD
6XE
6YE
6XF
6YF
6XG
6YG
6XH
6YH
7XA
7YA
7XB
7YB
7XC
7YC
7XD
(2)
Minimum t
RESET
(ms)
140
240
140
240
140
240
140
240
140
240
140
240
140
240
140
240
140
240
140
240
140
240
140
240
140
240
140
240
140
240
140
240
Nominal
Threshold
Voltage
4.625
4.625
4.375
4.375
3.075
3.075
2.925
2.925
2.625
2.625
2.313
2.313
2.188
2.188
1.665
1.665
4.625
4.625
4.375
4.375
3.075
3.075
2.925
2.925
2.625
2.625
2.313
2.313
2.188
2.188
1.665
1.665
Package
(3,4)
8-Pin (2mm
×
2mm) Thin MLF
®
8-Pin (2mm
×
2mm) Thin MLF
®
Integrated Pull-Up
Resistors
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
8-Pin (2mm
×
2mm) Thin MLF
®
8-Pin (2mm
×
2mm) Thin MLF
8-Pin (2mm
×
2mm) Thin MLF
8-Pin (2mm
×
2mm) Thin MLF
®
8-Pin (2mm
×
2mm) Thin MLF
®
®
MIC2786-XDYMT
(2)
MIC2786-YDYMT
(2)
MIC2786-XEYMT
(2)
MIC2786-YEYMT
(2)
MIC2786-XFYMT
(2)
8-Pin (2mm
×
2mm) Thin MLF
®
®
8-Pin (2mm
×
2mm) Thin MLF
®
8-Pin (2mm
×
2mm) Thin MLF
8-Pin (2mm
×
2mm) Thin MLF
®
®
MIC2786-YFYMT
(2)
MIC2786-XGYMT
(2)
MIC2786-YGYMT
(2)
8-Pin (2mm
×
2mm) Thin MLF
®
8-Pin (2mm
×
2mm) Thin MLF
®
8-Pin (2mm
×
2mm) Thin MLF
®
8-Pin (2mm
×
2mm) Thin MLF
®
MIC2786-XHYMT
(2)
MIC2786-YHYMT
(2)
MIC2787-XAYMT
(2)
MIC2787-YAYMT
(2)
MIC2787-XBYMT
(2)
8-Pin (2mm
×
2mm) Thin MLF
®
8-Pin (2mm
×
2mm) Thin MLF
®
8-Pin (2mm
×
2mm) Thin MLF
®
8-Pin (2mm
×
2mm) Thin MLF
®
8-Pin (2mm
×
2mm) Thin MLF
®
8-Pin (2mm
×
2mm) Thin MLF
®
8-Pin (2mm
×
2mm) Thin MLF
®
8-Pin (2mm
×
2mm) Thin MLF
®
8-Pin (2mm
×
2mm) Thin MLF
®
8-Pin (2mm
×
2mm) Thin MLF
®
MIC2787-YBYMT
(2)
MIC2787-XCYMT
(2)
MIC2787-YCYMT
(2)
MIC2787-XDYMT
MIC2787-YDYMT
MIC2787-XEYMT
(2)
MIC2787-YEYMT
(2)
MIC2787-XFYMT
(2)
MIC2787-YFYMT
(2)
MIC2787-XGYMT
(2)
7YD
7XE
7YE
7XF
7YF
7XG
7YG
7XH
7YH
8-Pin (2mm
×
2mm) Thin MLF
®
8-Pin (2mm
×
2mm) Thin MLF
®
8-Pin (2mm
×
2mm) Thin MLF
®
8-Pin (2mm
×
2mm) Thin MLF
®
MIC2787-YGYMT
(2)
MIC2787-XHYMT
(2)
MIC2787-YHYMT
(2)
Notes:
1.
2.
3.
4.
8-Pin (2mm
×
2mm) Thin MLF
®
8-Pin (2mm
×
2mm) Thin MLF
®
8-Pin (2mm
×
2mm) Thin MLF
®
All devices available in Tape and Reel only.
Contact Factory for availability.
Thin MLF
Thin MLF
®
®
▲
= Pin 1 identifier.
is a Green RoHS-compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
October 2011
2
M9999-102711-A
Micrel, Inc.
MIC2786/MIC2787
Pin Configuration
MIC2786/MIC2787
®
8-Pin (2mm
×
2mm) Thin MLF
Top View
Pin Description
Pin Number
1
2
3
Pin Name
RSTP
GND
/MR1
Pin Function
Active-High Push-Pull Reset Output. This output changes from low-to-high when VIN drops below the
selected reset threshold or both manual reset pins are pulled low for the setup delay period. RSTP
remains high for the reset timeout delay after VIN exceeds the reset threshold plus hysteresis voltage
or the setup delay period has elapsed.
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
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. Connect to VIN if unused, do not leave floating.
Active-Low Open-Drain Reset Output. This output changes from high-to-low when VIN drops below
the selected reset threshold or both manual reset pins are pulled low for the setup delay period. /RST
remains low for the reset timeout delay after VIN exceeds the reset threshold or the setup delay has
elapsed and it requires an external pull-up resistor.
Programmable Delay Input with Tri-State Connection. When left open, setup delay is 2s, when
connected to GND, setup delay is 4s and when connected to VIN, setup delay is 6s.
No Connect. Leave pin floating.
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
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. If unused, connect to VIN; do not leave floating.
Supply Voltage Pin. It is the input to the Supply Voltage monitor. When the supply voltage falls below
the reset threshold voltage, reset outputs (/RST and RSTP) are triggered immediately. When the
supply voltage rises above the reset threshold plus hysteresis voltage, the reset outputs remain
asserted for the duration of the reset timeout delay. A minimum 0.1μF decoupling ceramic capacitor
must be connected between VIN and GND close to the pins.
Exposed Pad. Connect to GND.
4
/RST
5
6
7
PDY
NC
/MR0
8
VIN
EPAD
EPAD
October 2011
3
M9999-102711-A
Micrel, Inc.
MIC2786/MIC2787
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
) .....................................
−0.3V
to
+6.0V
Reset Input Voltage (/MR0, /MR1)..........
−0.3V
to V
IN
+0.3V
Open Drain Reset Output (/RST) .................
−0.3V
to
+6.0V
Push-Pull Reset Output (RSTP)..............
−0.3V
to V
IN
+0.3V
Tri-State Programmable Delay (PDY).....
−0.3V
to V
IN
+0.3V
Lead Temperature (soldering, 10s)............................ 260°C
Junction Temperature (T
J
) ........................−40°C to +150°C
Storage Temperature (Ts).........................
−55°C
to
+150°C
ESD Rating (Human Body Model)
(3)
.............................. 2kV
ESD Rating (Machine Model)
(3)
...................................300V
Operating Ratings
(2)
Supply Voltage (V
IN
)..................................... +1.6V to +5.5V
Reset Input Voltage (/MR0, /MR1)......................... 0V to V
IN
Open Drain Reset Output (/RST)...................... 0V to +5.5V
Push-Pull Reset Output (RSTP) ............................ 0V to V
IN
Tri-State Programmable Delay (PDY).................... 0V to V
IN
Ambient Temperature (T
A
) ..........................
−40°C
to +85°C
Junction Thermal Resistance
2mm
×
2mm Thin MLF
®
(θ
JA
).............................90°C/W
Electrical Characteristics
(4)
V
IN
= 3.0V, T
A
= 25°C,
Bold
values indicate
−40°C ≤
T
A
≤
+85°C; unless noted otherwise.
Parameter
Power Supply Input
Supply Voltage (V
IN
)
V
IN
= 5V; /MR0, /MR1, /RST, RSTP, and PDY
open
V
IN
= 3V; /MR0, /MR1, /RST, RSTP, and PDY
open
A (falling) T
A
= 25°C
A (falling)
−40°C ≤
T
A
≤
+85°C
B (falling) T
A
= 25°C
B (falling) –40°C
≤
T
A
≤
+85°C
C (falling) T
A
= 25°C
C (falling) –40°C
≤
T
A
≤
+85°C
D (falling) T
A
= 25°C
Reset Threshold Voltage (V
TH
)
D (falling) –40°C
≤
T
A
≤
+85°C
E (falling) T
A
= 25°C
E (falling) –40°C
≤
T
A
≤
+85°C
F (falling) T
A
= 25°C
F (falling) –40°C
≤
T
A
≤
+85°C
G (falling) T
A
= 25°C
G (falling) –40°C
≤
T
A
≤
+85°C
H (falling) T
A
= 25°C
H (falling) –40°C
≤
T
A
≤
+85°C
4.533
4.509
4.288
4.266
3.014
2.998
2.867
2.852
2.573
2.559
2.267
2.255
2.144
2.133
1.632
1.623
1.6
7.9
7.4
5.5
12.5
µA
V
Conditions
Min.
Typ.
Max.
Units
Supply Current (I
VIN
)
Reset Threshold Voltage
4.625
4.625
4.375
4.375
3.075
3.075
2.925
2.925
2.625
2.625
2.313
2.313
2.188
2.188
1.665
1.665
4.718
4.741
4.463
4.484
3.137
3.152
2.984
2.998
2.678
2.691
2.359
2.371
2.232
2.243
1.698
1.707
V
October 2011
4
M9999-102711-A
Micrel, Inc.
MIC2786/MIC2787
Electrical Characteristics
(4)
(Continued)
V
IN
= 3.0V, T
A
= 25°C,
Bold
values indicate
−40°C ≤
T
A
≤
+85°C; unless noted otherwise.
Parameter
Hysteresis Voltage (V
HYST
)
Hysteresis Voltage (V
HYST
)
Reset Time
PDY = Open
Setup Delay (t
SETUP
)
PDY = 0V
PDY = V
IN
Reset Timeout Delay (t
RESET
)
Reset Outputs (/RST, RSTP)
V
IN
=
4.5V, I
SINK
= 3.2mA
Reset Output Voltage Low
(/RST Output and RSTP Output) (V
OL
)
V
IN
=
3.3V, I
SINK
= 2.5mA
V
IN
=
1.6V, I
SINK
= 1.0mA
V
IN
=
4.5V, I
SOURCE
= 0.8mA
Reset Output Voltage High
(RSTP Output) (V
OH
)
/RST Output Leakage (I
LO
)
Manual Reset Inputs (/MR0, /MR1)
Input High Voltage (V
IH
)
Input Low Voltage (V
IL
)
Internal Pull-Up Resistor (R
PU
)
Leakage Current /MR0, /MR1 Pin (I
MR
)
Programmable Setup Delay Input (PDY)
PDY = V
IN
, /MR0 = /MR1 = 0V
Input Bias Current PDY Pin (I
PDY
)
PDY = V
IN
, /MR0 = V
IN
or /MR1= V
IN
PDY = 0V, /MR0 = /MR1 = 0V
PDY = 0V, /MR0 = V
IN
or /MR1 = V
IN
Notes:
1.
2.
3.
4.
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.
Specification for packaged product only.
Conditions
A, B
C, D, E, F, G, H
Min.
Typ.
0.5
1.0
2.0
4.0
6.0
220
350
Max.
Units
%
%
s
s
s
ms
ms
1.6
3.2
4.8
140
240
2.4
4.8
7.2
280
480
Option X
Option Y
0.3
0.3
0.3
0.8
×
V
IN
0.8
×
V
IN
0.8
×
V
IN
0.3
μA
V
0.3
V
kΩ
1.0
+60
100
-60
100
μA
μA
nA
μA
nA
65
−1.0
V
V
V
IN
=
2.7V, I
SOURCE
= 0.5mA
V
IN
=
1.6V, I
SOURCE
= 250μA
V
/RST
= 5.5V
1.2
MIC2786 only
/MR0, /MR1 inputs; MIC2787 only
October 2011
5
M9999-102711-A
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