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EM MICROELECTRONIC - MARIN SA Reset Circuit with Fixed Delay
Description
The EM6353 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 125C 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. The EM6353 features three output types: active-low pushpull, active-low open-drain and active-high push-pull. Small SC70-5L and SOT23-3L packages as well as ultra-low supply current of 2.9A make the EM6353 an ideal choice for portable and battery-operated devices.
EM6353
Features
200ms reset timeout period (25ms on request) Ultra-low supply current of 2.9A (VDD=3.3V) Operating temperature range: -40C to +125C 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 Active-high RESET push-pull No external components Immune to short negative VDD transients Guaranteed Reset valid down to 0.8V Threshold hysteresis: 2.1% of VTH Very small SOT23-3L and SC70-5L packages
Typical Application
VDD
VDD RESET
*
VDD RESET
Applications
Mobile phones Set-top boxes Video, digital cameras, DVD players and recorders Modems Personal computers Switching hubs Copiers and fax Utility meters Automotive systems
EM6353
GND
MPU, DSP
GND
GND * REXT for open-drain version only
Pin Configuration (top view)
GND 1 3 RESET 2 (RESET) VDD VDD 2 RESET 1 (RESET) 3 GND
SOT23-3L
"beta" bonding
NC VDD NC 1 2 3 5 RESET (RESET) 4 GND
SOT23-3L
"alpha" bonding
GND 4 RESET 5 (RESET) 3 NC 2 VDD 1 NC
Block Diagram
VDD
Oscillator
+
Voltage Reference
(compatible with SC70-3 by rotating 180)
SC70-5L
-
Reset Logic
RESET RESET
GND
Pin Description
Pin SOT23-3L "beta"
1
SOT23-3L "alpha"
3
SC70-5L
4
Name
GND Ground
Function
RESET
2 1 5 RESET 3 2 2 1,3 VDD N.C.
Active-low RESET output. RESET remains low for the reset timeout period after all reset conditions are deasserted and then goes high. Active-high RESET output. RESET remains high for the reset timeout period after all reset conditions are deasserted and then goes low. Supply Voltage (5.5V max.) Not connected. Not internally connected.
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EM6353
Ordering Information
EM6353 B X 2SP3B - 2.9
Reset Threshold Voltage: 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 Package & Bonding: 1SP3B = SOT23-3, "alpha", Tape&Reel 3kpcs 2SP3B = SOT23-3, "beta", Tape&Reel 3kpcs SC5B = SC70-5, Tape&Reel 3kpcs Reset Output Type: X = Active-low /RES push-pull Y = Active-low /RES open-drain Z = Active-high RES push-pull Delay (tPOR): B = 200ms A = 25ms
Versions
Please contact EM Microelectronic for availability. Please make sure to give the complete Part Number when ordering. All parts are offered in tape-and-reel only (3000 units).
Threshold Voltage
1.31V
Delay (tPOR)
Output Type
Package
SOT23-3L "alpha"
Part Number EM6353BX1SP3B-1.3 EM6353BX2SP3B-1.3 EM6353BXSC5B-1.3 EM6353BX1SP3B-1.8 EM6353BX2SP3B-1.8 EM6353BXSC5B-1.8 EM6353BX1SP3B-2.6 EM6353BX2SP3B-2.6 EM6353BXSC5B-2.6 EM6353BY1SP3B-2.6 EM6353BY2SP3B-2.6 EM6353BX1SP3B-2.9 EM6353BX2SP3B-2.9 EM6353BXSC5B-2.9 EM6353BY1SP3B-2.9 EM6353BY2SP3B-2.9 EM6353BYSC5B-2.9 EM6353BZ2SP3B-2.9
Top Marking
ALBA ALWA ALWA ALBE ALWE ALWE ALBG ALWG ALWG ALBT ALWT ALBH ALWH ALWH ALBU ALWU ALWU ALW6
200ms
Active-low push-pull RESET
SOT23-3L "beta" SC70-5L SOT23-3L "alpha"
1.80V
200ms
Active-low push-pull RESET
SOT23-3L "beta" SC70-5L SOT23-3L "alpha" SOT23-3L "beta" SC70-5L SOT23-3L "alpha"
Active-low push-pull RESET 2.63V 200ms Active-low open-drain RESET
SOT23-3L "beta" SOT23-3L "alpha" SOT23-3L "beta" SC70-5L SOT23-3L "alpha"
Active-low push-pull RESET 2.93V 200ms Active-low open-drain RESET Active-high push-pull RESET
SOT23-3L "beta" SC70-5L SOT23-3L "beta"
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EM6353
Threshold Voltage Delay (tPOR) Output Type
Active-low push-pull RESET 3.08V 200ms Active-low open-drain RESET Active-high push-pull RESET Active-low push-pull RESET 4.40V 200ms Active-low open-drain RESET
Package
SOT23-3L "beta" SC70-5L SOT23-3L "beta" SOT23-3L "beta" SOT23-3L "alpha" SOT23-3L "alpha" SC70-5L SOT23-3L "alpha" SOT23-3L "beta" SC70-5L SOT23-3L "alpha"
Part Number EM6353BX2SP3B-3.1 EM6353BXSC5B-3.1 EM6353BY2SP3B-3.1 EM6353BZ2SP3B-3.1 EM6353BX1SP3B-4.4 EM6353BY1SP3B-4.4 EM6353BYSC5B-4.4 EM6353BX1SP3B-4.6 EM6353BX2SP3B-4.6 EM6353BXSC5B-4.6 EM6353BY1SP3B-4.6 EM6353BY2SP3B-4.6 EM6353BZ2SP3B-4.6
Top Marking
ALWJ ALWJ ALWV ALW7 ALBK ALBW ALWV ALBL ALWL ALWL ALBLX ALWX ALW9
Active-low push-pull RESET 4.63V 200ms Active-low open-drain RESET Active-high push-pull RESET
SOT23-3L "beta" SOT23-3L "beta"
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EM6353
Absolute Maximum Ratings
Parameter
Voltage at VDD to GND Minimum voltage at any signal pin Maximum voltage at any signal pin Electrostatic discharge maximum to MIL-STD-883C method 3015 Max. soldering conditions Storage Temperature Range
Handling Procedures
Symbol
VDD VMIN VMAX VESD TMAX TSTG
Conditions
-0.3V to +6V GND - 0.3V VDD + 0.3V 2000V 250C x 10s -65C to +150C
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.
Stresses above these listed maximum ratings may cause permanent damage to the device. Exposure beyond specified operating conditions may affect device reliability or cause malfunction.
Operating Conditions
Parameter Supply voltage (note 1) Operating Temperature Symbol Min Max Unit VDD 0.8 5.5 V TA -40 +125 C
Electrical Characteristics
Unless otherwise specified: VDD= 0.8V to 5.5V, TA=-40C to +125C (note 1). Parameter Symbol Conditions
VDD=1.5V Supply current (note 2) IDD VDD=3.3V VDD=5.0V EM6353 - 1.3 +25C -40C to +125C +25C -40C to +125C +25C -40C to +125C +25C -40C to +85C -40C to +125C +25C -40C to +85C -40C to +125C +25C -40C to +85C -40C to +125C +25C -40C to +85C -40C to +125C +25C -40C to +85C -40C to +125C +25C -40C to +85C -40C to +125C +25C -40C to +85C -40C to +125C +25C -40C to +85C -40C to +125C +25C -40C to +85C -40C to +125C +25C -40C to +85C -40C to +125C +25C -40C to +85C -40C to +125C
Min
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 -
Typ
2.3 2.9 3.4 1.31
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
A
EM6353 - 1.4
1.38
EM6353 - 1.6
1.57
EM6353 - 1.7
1.66
EM6353 - 1.8 Threshold voltage (note 3)
1.80
VTH
EM6353 - 2.2
2.20
V
EM6353 - 2.6
2.63
EM6353 - 2.9
2.93
EM6353 - 3.1
3.08
EM6353 - 4.4
4.40
EM6353 - 4.6 Threshold hysteresis VHYS
4.63 2.1%*VTH
TA=+25C
V
Note 1: Note 3:
Production tested at +25C only. Over temperature limits are guaranteed by design, not production tested. VDD min=0.9V for active-high versions (EM6353_Z). Threshold voltage is specified for VDD falling.
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EM6353
Electrical Characteristics
Parameter
Reset timeout period Propagation delay time VDD to RESET (RESET) delay Open-drain RESET output Voltage (continued)
Unless otherwise specified: VDD= 0.8V to 5.5V, TA=-40C to +125C (note 1). Symbol
tPOR tP
Conditions
VDD from 0V to VTH (typ)+15% (note 2 and 4). TA= +25C EM6353B EM6353A
Min
155 19.4 2 0.8 2 4 -
Typ
200 25 130 -
Max
224 28 255 0.3 0.3 0.3 0.3 0.3 0.35 0.5
Unit
ms
VDD drops from VTH (typ)+0.2V to VTH (typ)-0.2V (note 2). TA= +25C VDD>1V IOL=100A IOL=1.5mA IOL=3mA IOL=100A IOL=1.5mA IOL=3mA IOH=-30A IOH=-1.5mA IOH=-3mA VDD>2.5V VDD>5V VDD>1V
s
VOL
V
VOL Push-pull RESET / RESET Output voltage VOH Output leakage current ILEAK
VDD>2.5V VDD>5V VDD>1V VDD>2.5V VDD>5V
V
Only for EM6353_Y (open-drain)
A
Note 1: Note 2: Note 4:
Production tested at +25C only. Over temperature limits are guaranteed by design, not production tested. VDD min=0.9V for active-high versions (EM6353_Z).
RESET (RESET) open. Standard version is EM6353B (tPOR =200ms), available at all times. EM6353A (tPOR =25ms) is available by mask option and upon minimum order quantity. Please contact EM sales.
Timing Waveforms
tSEN
VDD VTH
Overdrive
VHYS
0.8V t logic "1" RESET logic "0" t logic "1"
tPOR tP
RESET RESET
logic "0" t
Note 6: tSEN = Maximum Transient Duration. Please refer to figure on next page. Note 7: Overdrive = VTH- -VDD. Please refer to figure on next page.
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EM6353
Typical Operating Characteristics
(Typical values are at TA=+25C unless otherwise noted, RESET or RESET open.)
7 6 5 [ uA ] 4 3 2 1 0 -50
VDD 1. 5 V VDD 5 . 0 V VDD 3 . 3 V
300 250 200 [ us ] 150 100 50 0 -50 -25
-25
0
25
50 [ C ]
75
100 125
0
25
50
75
100 125
[ C ]
IDD vs. Temperature
Propagation Time tP vs. Temperature
200% 175% 150% 125% 100% 75% 50% 25% 0% -50 -25 0 25 50 75 100 125 [ C ] tPOR (C) tPOR (25C) [ us ]
400 350 300 250 200 150 100 50 0 1 10 [ mV ] 100 1000 Reset occurs above this line
Reset Timeout Period tPOR vs. Temperature (normalized with respect to tPOR 25C)
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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EM6353
Package Information
D
A1 A2 A
SOT23-3L
E
C L
B
H e
SYMBOL A A1 A2 B C D E e e1 H L MIN 0.89 0.013 0.95 0.37 0.085 2.80 1.20 1.78 2.10
e1
TYP MAX 1.04 1.12 0.10 0.97 1.00 0.51 0.12 0.18 2.95 3.04 1.32 1.40 0.95 1.90 2.05 2.40 2.64 0.55
Dimensions are in mm
D
SC70-5L
L
HE
E
PIN 1
e
e
b Q1 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
A2
A
A1
NOTE: All dimensions are in millimeters Dimensions are inclusive of plating Dimensions are exclusive of mold flash & metal burr All specifications comply to EIAJ SC70
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 cannot assume responsibility for use of any circuitry described other than circuitry entirely embodied in an EM Microelectronic-Marin SA product. EM Microelectronic-Marin SA reserves the right to change the circuitry and specifications without notice at any time. You are strongly urged to ensure that the information given has not been superseded by a more up-to-date version.
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.
(c) EM Microelectronic-Marin SA, 05/04, Rev. G
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