EM EM6325DX-1.8 Reset circuit with manual reset Datasheet

EM MICROELECTRONIC - MARIN SA
EM6325
Reset Circuit with Manual Reset
Description
Features
The EM6325 is an ultra-low current reset circuit available in a
large variety of configurations and very small packages for
maximum flexibility in all end-applications up to 125°C and
using power supplies between 1.5V and 5.5V.
This circuit monitors the supply voltage of any electronic
system, and generates the appropriate reset signal after a
fixed reset timeout period. The threshold defines the
minimum allowed voltage which guarantees the good
functionality of the system. When VDD rises above VTH, the
output remains active for an additional delay time. This
allows the system to stabilize before getting fully active.
This circuit features a Manual Reset: an input that asserts
reset when pulled low ( MR with internal pull-up).
Small SC70-4L, SC70-5L and SOT23-5L packages as well
as ultra-low supply current of 2.9μA make the EM6325 an
ideal choice for portable and battery-operated devices.
‰
‰
‰
‰
‰
‰
‰
‰
‰
‰
RESET
EM6325
MR
RESET
‰
VDD
*
VDD
Applications
MPU, DSP
‰
RESET
‰
‰
GND
GND
‰
* REXT for open-drain version only
‰
‰
Block Diagram
‰
‰
VDD
Oscillator
+
Reset
Logic
-
Computers
Servers and workstations
Modems
Wireless communication
Metering
Playstations
PDA , Webpad
Automotive systems
Pin Configuration (top view)
RESET
RESET
RESET
1
GND
2
RESET
3
push-pull / open-drain
Filter
MR
Active-high RESET push-pull
Immune to short negative VDD transients
Guaranteed Reset valid down to 0.9V
Threshold hysteresis: 2.1% of VTH
Very small SOT23-5L, SC70-5L and SC70-4L
RESET
GND
Voltage
Reference
±1.5% reset threshold accuracy
11 reset threshold voltages VTH: 4.63V, 4.4V, 3.08V,
2.93V, 2.63V, 2.2V, 1.8V, 1.66V, 1.57V, 1.38V, 1.31V
3 reset output options:
Active-low RESET push-pull
Active-low RESET open-drain
Typical Application
VDD
Manual reset function
200ms reset timeout period (1.6ms, 25ms, 1600ms on
request)
Ultra-low supply current of 2.9μA (VDD=3.3V)
Operating temperature range: -40°C to +125°C
5
VDD
4
MR
push-pull
SOT23-5 / SC70-5
GND
top view
GND
1
4
VDD
RESET
(RESET)
2
3
MR
SC70-4
top view
Pin Description
Pin
SOT23-5L / SC70-5L
SC70-4L
Name
Function
Active-low RESET output. RESET remains low for the reset timeout period and
1
2
RESET
2
1
GND
3
2
RESET
4
3
MR
5
4
VDD
Copyright © 2005, EM Microelectronic-Marin SA
then goes high after all reset conditions are deasserted or after MR goes from low
to high
Ground
Active-high RESET output. RESET remains high for the reset timeout period and
then goes low after all reset conditions are deasserted or after MR goes from low to
high
Manual Reset input with an internal pull-up 15kΩ resistor. Reset remains active as
long as MR is low and for tPOR after MR returns high. MR can be driven with a
CMOS output or shorted to ground with a switch
Supply Voltage (5.5V max.)
1
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EM6325
Ordering Information
EM6325 C X SP5B - 2.9 +
Delay (tPOR):
C = 200ms
A = 1.6ms
RoHS Compliance:
+ = lead-free/green mold compliant
[blank] = leaded
B = 25ms
D = 1600ms
Reset Threshold Voltage (VTH):
1.3 = 1.31V
2.6 = 2.63V
1.4 = 1.38V
2.9 = 2.93V
1.6 = 1.57V
3.1 = 3.08V
1.7 = 1.66V
4.4 = 4.40V
1.8 = 1.80V
4.6 = 4.63V
2.2 = 2.20V
Reset Output Type:
X = Active-low /RES push-pull
Active-high RES push-pull
Y = Active-low /RES open-drain
Active-high RES push-pull
Z = Active-high RES push-pull
Package:
SP5B = SOT23-5, Tape&Reel 3000 pcs
SC5B = SC70-5, Tape&Reel 3000 pcs
SC4B = SC70-4, Tape&Reel 3000 pcs
Top Marking
Package top marking below is for most parts in leaded package (first letter is “A”). For lead-free/green mold (RoHS) parts,
the first letter of top marking begins with letter “B” instead of letter “A”. The underscore "_ _" refers to the four-letter code for
the package (eg. SP5B, SC4B, …).
Part Number
EM6325AX__-1.3
EM6325AX__-1.4
EM6325AX__-1.6
EM6325AX__-1.7
EM6325AX__-1.8
EM6325AX__-2.2
EM6325AX__-2.6
EM6325AX__-2.9
EM6325AX__-3.1
EM6325AX__-4.4
EM6325AX__-4.6
EM6325AY__-1.3
EM6325AY__-1.4
EM6325AY__-1.6
EM6325AY__-1.7
EM6325AY__-1.8
EM6325AY__-2.2
EM6325AY__-2.6
EM6325AY__-2.9
EM6325AY__-3.1
EM6325AY__-4.4
EM6325AY__-4.6
Top
Marking
ANAA
ANAB
ANAC
ANAD
ANAE
ANAF
ANAG
ANAH
ANAJ
ANAK
ANAL
ANAM
ANAN
ANAP
ANAQ
ANAR
ANAS
ANAT
ANAU
ANAV
ANAW
ANAX
Part Number
EM6325BX__-1.3
EM6325BX__-1.4
EM6325BX__-1.6
EM6325BX__-1.7
EM6325BX__-1.8
EM6325BX__-2.2
EM6325BX__-2.6
EM6325BX__-2.9
EM6325BX__-3.1
EM6325BX__-4.4
EM6325BX__-4.6
EM6325BY__-1.3
EM6325BY__-1.4
EM6325BY__-1.6
EM6325BY__-1.7
EM6325BY__-1.8
EM6325BY__-2.2
EM6325BY__-2.6
EM6325BY__-2.9
EM6325BY__-3.1
EM6325BY__-4.4
EM6325BY__-4.6
Top
Marking
ANBA
ANBB
ANBC
ANBD
ANBE
ANBF
ANBG
ANBH
ANBJ
ANBK
ANBL
ANBM
ANBN
ANBP
ANBQ
ANBR
ANBS
ANBT
ANBU
ANBV
ANBW
ANBX
Part Number
EM6325CX__-1.3
EM6325CX__-1.4
EM6325CX__-1.6
EM6325CX__-1.7
EM6325CX__-1.8
EM6325CX__-2.2
EM6325CX__-2.6
EM6325CX__-2.9
EM6325CX__-3.1
EM6325CX__-4.4
EM6325CX__-4.6
EM6325CY__-1.3
EM6325CY__-1.4
EM6325CY__-1.6
EM6325CY__-1.7
EM6325CY__-1.8
EM6325CY__-2.2
EM6325CY__-2.6
EM6325CY__-2.9
EM6325CY__-3.1
EM6325CY__-4.4
EM6325CY__-4.6
Top
Marking
ANCA
ANCB
ANCC
ANCD
ANCE
ANCF
ANCG
ANCH
ANCJ
ANCK
ANCL
ANCM
ANCN
ANCP
ANCQ
ANCR
ANCS
ANCT
ANCU
ANCV
ANCW
ANCX
Part Number
EM6325DX__-1.3
EM6325DX__-1.4
EM6325DX__-1.6
EM6325DX__-1.7
EM6325DX__-1.8
EM6325DX__-2.2
EM6325DX__-2.6
EM6325DX__-2.9
EM6325DX__-3.1
EM6325DX__-4.4
EM6325DX__-4.6
EM6325DY__-1.3
EM6325DY__-1.4
EM6325DY__-1.6
EM6325DY__-1.7
EM6325DY__-1.8
EM6325DY__-2.2
EM6325DY__-2.6
EM6325DY__-2.9
EM6325DY__-3.1
EM6325DY__-4.4
EM6325DY__-4.6
Top
Marking
ANDA
ANDB
ANDC
ANDD
ANDE
ANDF
ANDG
ANDH
ANDJ
ANDK
ANDL
ANDM
ANDN
ANDP
ANDQ
ANDR
ANDS
ANDT
ANDU
ANDV
ANDW
ANDX
Standard Versions, Samples
Sample stock is generally held on standard versions (below) only. Non standard versions have a 30,000 pieces minimum
order quantity. Please contact factory for other versions not shown here and for availability of non standard versions.
EM6325AXSC4B-2.9
EM6325CXSC5B-2.9
EM6325CXSP5B-1.3
EM6325CXSP5B-2.6
EM6325CXSP5B-2.9
EM6325CXSP5B-3.1
EM6325CYSP5B-2.9
EM6325CYSP5B-4.6
EM6325DXSC4B-2.6
EM6325CXSP5B-4.6
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EM6325
Handling Procedures
Absolute Maximum Ratings
Parameter
Voltage at VDD to GND
Minimum voltage at any signal pin
Maximum voltage at any signal pin
Electrostatic discharge max. to
MIL-STD-883C method 3015.7
with ref. to VSS
Max. soldering conditions
Storage Temperature Range
Symbol
Conditions
VDD
VMIN
VMAX
-0.3V to +6V
GND - 0.3V
VDD + 0.3V
VESD
2000V
TMAX
TSTG
250°C x 10s
-65°C to +150°C
This device has built-in protection against high static
voltages or electric fields; however, anti-static
precautions must be taken as for any other CMOS
component. Unless otherwise specified, proper
operation can only occur when all terminal voltages are
kept within the voltage range. Unused inputs must
always be tied to a defined logic voltage level.
Operating Conditions
Stresses above these listed maximum ratings may
cause permanent damages to the device. Exposure
beyond specified operating conditions may affect device
reliability or cause malfunction.
Parameter
Symbol Min Max Unit
Supply voltage
Operating Temperature
VDD
TA
0.9
-40
5.5
+125
V
°C
Electrical Characteristics
Unless otherwise specified: VDD= 0.9V to 5.5V, TA=-40°C to +125°C (note 1).
Parameter
Symbol
Conditions
Min
+25°C
VDD=1.5V
-40°C to +125°C
+25°C
VDD=3.3V
-40°C to +125°C
+25°C
VDD=5.0V
-40°C to +125°C
+25°C
EM6325 – 1.3
-40°C to +85°C
-40°C to +125°C
+25°C
EM6325 – 1.4
-40°C to +85°C
-40°C to +125°C
+25°C
EM6325 – 1.6
-40°C to +85°C
-40°C to +125°C
+25°C
EM6325 – 1.7
-40°C to +85°C
-40°C to +125°C
+25°C
EM6325 – 1.8
-40°C to +85°C
-40°C to +125°C
+25°C
EM6325 – 2.2
-40°C to +85°C
-40°C to +125°C
+25°C
EM6325 – 2.6
-40°C to +85°C
-40°C to +125°C
+25°C
EM6325 – 2.9
-40°C to +85°C
-40°C to +125°C
+25°C
EM6325 – 3.1
-40°C to +85°C
-40°C to +125°C
+25°C
EM6325 – 4.4
-40°C to +85°C
-40°C to +125°C
+25°C
EM6325 – 4.6
-40°C to +85°C
-40°C to +125°C
TA=+25°C
1.290
1.245
1.221
1.359
1.311
1.286
1.546
1.492
1.463
1.635
1.577
1.547
1.773
1.710
1.678
2.167
2.090
2.050
2.591
2.499
2.451
2.886
2.784
2.731
3.034
2.926
2.871
4.334
4.180
4.101
4.561
4.399
4.315
-
Supply current (note 2)
Threshold voltage
(note 3)
Threshold hysteresis
IDD
VTH
VHYS
Typ
2.3
2.9
3.4
1.31
1.38
1.57
1.66
1.80
2.20
2.63
2.93
3.08
4.40
4.63
2.1%•VTH
Max
4.6
7
5.5
8.3
6.3
9.6
1.330
1.382
1.387
1.401
1.456
1.461
1.594
1.656
1.663
1.685
1.751
1.758
1.827
1.899
1.906
2.233
2.321
2.330
2.669
2.775
2.785
2.974
3.091
3.103
3.126
3.249
3.262
4.466
4.642
4.660
4.699
4.885
4.903
-
Unit
μA
V
V
Note 1: Production tested at +25°C only. Over temperature limits are guaranteed by design, not production tested.
Note 3: Threshold voltage is specified for VDD falling.
Copyright © 2005, EM Microelectronic-Marin SA
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EM6325
Electrical Characteristics (continued)
Unless otherwise specified: VDD= 0.9V to 5.5V, TA=-40°C to +125° C (note 1).
Parameter
Reset timeout period
Propagation delay time
VDD to RESET (RESET) delay
Open-drain RESET output
Voltage
Symbol
tPOR
tP
VOL
VOL
Push-pull RESET / RESET
Output voltage
VOH
Output leakage current
ILEAK
Conditions
(note 2 and 4)
VDD from 0V to VTH (typ)+15%
TA= +25°C
Min
Typ
Max
EM6325C
155
200
224
EM6325A
0.7
1.6
3.8
EM6325B
19.4
25
28
EM6325D
1240
1600
1792
2
130
255
VDD drops from VTH (typ)+0.2V to VTH (typ)-0.2V
(note 2). TA= +25°C
VDD>1V
IOL=100μA
-
-
0.3
VDD>2.5V
IOL=1.5mA
-
-
0.3
VDD>5V
IOL=3mA
-
-
0.35
Unit
ms
μs
V
VDD>1V
IOL=100μA
-
-
0.3
VDD>2.5V
IOL=1.5mA
-
-
0.3
VDD>5V
IOL=3mA
-
-
0.35
VDD>1V
IOH=-30μA
0.8
-
-
VDD>2.5V
IOH=-1.5mA
2
-
-
VDD>5V
IOH=-3mA
4
-
-
-
-
0.5
μA
0.3•VDD
V
Only for EM6325_Y (open-drain)
V
MANUAL RESET ( MR )
MR Input low
VMRT low
MR Input high
VMRT high
MR to Reset delay
tMD
Pulse width at MR (note 5)
tPMD
MR Internal Pull-up resistor
RMR
TA= +25°C
0.7•VDD
V
μs
0.3
μs
1
TA=-40°C to +125°C
4.8
15
31
kΩ
Note 1: Production tested at +25°C only. Over temperature limits are guaranteed by design, not production tested.
Note 2: RESET (RESET) open.
Note 4: Standard version for tPOR is 200ms (typ), available at all times. Other option (1.6ms, 25ms, 1600ms) are available
by mask option and upon minimum order quantity. Please contact EM sales.
Note 5: Pulse width must be greater than 1μs to ensure the RESET (RESET) to go active.
Copyright © 2005, EM Microelectronic-Marin SA
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EM6325
Timing Waveforms
tSEN
VDD
VHYS
VTH
Overdrive
0.8V
t
logic "1"
tPMD
MR
logic "0"
t
logic "1"
tPOR
RESET
tP
tMD
logic "0"
t
logic "1"
tPOR
RESET
logic "0"
t
Note 6: tSEN = Maximum Transient Duration. Please refer to figure on the next page.
Note 7: Overdrive = VTH -VDD. Please refer to figure on the next page.
Manual Reset Input
A logic low on MR asserts a reset. Reset remains asserted while MR is low, and for tPOR (200ms nominal for EM6325C) after
it returns high. MR has an internal 15kΩ pull-up resistor, so it can be left open if unused. This input can be driven with
CMOS logic levels or with open-drain outputs. Connect a normally open momentary switch from MR to VSS to create a
manual-reset function; debounce circuitry is integrated. If MR is driven from long cable or the device is used in a noisy
environment, connect a 0.1μF capacitor from MR to VSS to provide additional noise immunity (stronger external additional
pull-up resistor can also be added).
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EM6325
Typical Operating Characteristics
(Typical values are at TA=+25°C unless otherwise noted, MR , RESET and RESET open.)
7
300
VDD 3 . 3 V
6
250
5
[ uA ]
200
VDD 5 . 0 V
[ us ]
4
150
3
VDD 1. 5 V
2
100
50
1
0
-50
-25
0
25
50
75
0
-50 -25
100 125
0
25
[ °C ]
50
75
100 125
[ °C ]
IDD vs. Temperature
Propagation Time tP vs. Temperature
200%
400
175%
tPOR (°C)
350
150%
tPOR (25°C)
300
125%
[ us ]
100%
250
Reset occurs
above this line
200
75%
150
50%
100
25%
50
0
0%
-50 -25
0
25
50
75
1
100 125
10
100
1000
[ mV ]
[ °C ]
Reset Timeout Period tPOR vs. Temperature
(normalized with respect to tPOR 25°C)
Maximum Transient Duration tSEN
vs. Overdrive VTH-VDD
8%
6%
4%
2%
0%
-2%
-4%
-6%
-8%
-50
-25
0
25
50
75
100
125
[°C]
Threshold Voltage Variation vs. Temperature (normalized)
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EM6325
Package Information
D
E1
SOT23-5L
C
A1 A2 A
b
L
E
e
SYM BOL
A
A1
A2
b
C
D
E
E1
e
e1
L
e1
M IN
0.90
0.05
0.90
0.35
0.08
2.80
2.60
1.50
TYP M AX
1.30 1.45
0.08 0.15
1.15 1.30
0.50
0.20
2.90 3.00
2.80 3.00
1.75
0.95
1.90
0.45
Dimensions are in mm
SC70-5L
D
L
HE
E
PIN 1
e
A2
e
b
Q1
A
A1
Copyright © 2005, EM Microelectronic-Marin SA
c
SYMBOL
e
D
b
E
HE
Q1
A2
A1
A
c
L
MIN
MAX
0.65 BSC
1.80
2.20
0.15
0.30
1.15
1.35
1.80
2.40
0.10
0.40
0.80
1.00
0.00
0.10
0.80
1.10
0.10
0.18
0.10
0.30
NOTE:
y
All dimensions are in millimeters
y
Dimensions are inclusive of plating
y
Dimensions are exclusive of mold flash & metal burr
y
All specifications comply to EIAJ SC70
7
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EM6325
SC70-4L
D
e
e
L
HE
E
PIN 1
e1
b
Q1
b1
A2
A
A1
SYMBOL
e
e1
D
b
b1
E
HE
Q1
A2
A1
A
c
L
MIN
MAX
0.65 BSC
0.5 BSC
1.80
2.20
0.15
0.30
0.575
0.70
1.15
1.35
1.80
2.40
0.10
0.40
0.80
1.00
0.00
0.10
0.80
1.10
0.10
0.18
0.10
0.30
c
NOTE:
y All dimensions are in millimeters
y Dimensions are inclusive of plating
y Dimensions are exclusive of mold flash & metal burr
y All specifications comply to EIAJ SC70
y Even though the width of pin 2 on SC70-4L is slightly larger than on socalled 4-pin SC-82AB, the footprint of SC70-4L package is compatible
with the footprint of SC-82AB package from other suppliers, and thus
suitable for pin-to-pin replacement. Please check footprint on PCB.
Traceability for small packages
Due to the limited space on the package surface, the bottom marking contains a limited number of characters that provide only partial
information for lot traceability. Full information for complete traceability is however provided on the packing labels of the product at
delivery from EM. It is highly recommended that the customer insures full lot traceability of EM product in his final product.
EM Microelectronic-Marin SA (EM) makes no warranty for the use of its products, other than those expressly contained in the Company's
standard warranty which is detailed in EM's General Terms of Sale located on the Company's web site. EM assumes no responsibility for
any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without
notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual
property of EM are granted in connection with the sale of EM products, expressly or by implications. EM's products are not authorized for
use as components in life support devices or systems.
Product qualification is performed according to internal EM quality standards for industrial products. For any special requirement (eg. automotive grade) please
contact EM Microelectronic-Marin S.A.
© EM Microelectronic-Marin SA, 05/05, Rev. I
Copyright © 2005, EM Microelectronic-Marin SA
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