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Part: EM6353BX2SP3B-1.3
Category:
Description: Reset Circuit With Fixed Delay
Company: EM Microelectronic
Datasheet: Download EM6353BX2SP3B-1.3 datasheet File size : 513 kB
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Datasheet text preview:
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 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. 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 2.9µA 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 2.9µA (VDD=3.3V) Operating temperature range: -40°C to +125°C ±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
V DD
VDD RESET
*
VDD RESET
Applications
Microprocessor, microcontroller and DSP systems Portable/Battery-Powered equipment Notebook/desktop computers Workstations Wireless communication Automotive systems Industrial electronics PDA , Webpad
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
Block Diagram
VDD
Oscillator
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 GND
Voltage Ref erence
-
Reset Logic
RESET RESET
(compatible with SC70-3 by rotating 180°)
SC70-5L
Pin Description
Pin SOT23-3L "beta" 1 SOT23-3L "alpha" 3 SC70-5L 4 Name GND
RESET
Function Ground 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. 1 www.emmicroelectronic.com
2
1
5 RESET
3 -
2 -
2 1, 3
VDD N.C.
Copyright 2002, EM Microelectronic-Marin SA
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 = 3-pin SOT23-3, "alpha", Tape & Reel, 3000 units 2SP3B = 3-pin SOT23-3, "beta", Tape & Reel, 3000 units SC5B = 5-pin SC70-5, Tape & Reel, 3000 units Reset Output Type: X = Active-low /RESET push-pull Y = Active-low /RESET open-drain Z = Active-high RESET push-pull Delay (tPOR): B = 200ms A = 25ms
Standard versions in bold
Standard Versions
The versions below are considered standard and should be readily available. For other versions, please contact EM Microelectronic. Please make sure to give the complete Part Number when ordering. All parts are offered in tape-and-reel only.
Threshold Voltage 1.31V Delay (tPOR) Output Type Package SOT23-3L "alpha" 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" 2.63V 200ms Active-low push-pull RESET SOT23-3L "beta" SC70-5L SOT23-3L "alpha" 2.93V 200ms Active-low push-pull RESET SOT23-3L "beta" SC70-5L SOT23-3L "alpha" 4.63V 200ms Active-low push-pull RESET SOT23-3L "beta" SC70-5L 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 EM6353BX1SP3B-2.9 EM6353BX2SP3B-2.9 EM6353BXSC5B-2.9 EM6353BX1SP3B-4.6 EM6353BX2SP3B-4.6 EM6353BXSC5B-4.6 Top Marking ALBA ALWA ALWA ALBE ALWE ALWE ALBG ALWG ALWG ALBH ALW H ALW H ALBL ALW L ALW L
Copyright 2002, EM Microelectronic-Marin SA
2
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EM6353
Absolute Maximum Ratings
Parameter Symbol Conditions Voltage at VDD to GND VDD -0.3V to +6V Minimun voltage at reset VMIN GND - 0.3V Maximun voltage at reset VMAX VDD + 0.3V Storage Temperature Range TSTG -65°C to +150°C 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.
Handling Procedures
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
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=-40°C to +125°C (note 1). Parameter Symbol Conditions
VDD=1.5V Supply current (note 2) IDD VDD=3.3V VDD=5.0V EM6353 1.31 +25°C -40°C to +125°C +25°C -40°C to +125°C +25°C -40°C to +125°C +25°C -40°C to +85°C -40°C to +125°C +25°C -40°C to +85°C -40°C to +125°C +25°C -40°C to +85°C -40°C to +125°C +25°C -40°C to +85°C -40°C to +125°C +25°C -40°C to +85°C -40°C to +125°C +25°C -40°C to +85°C -40°C to +125°C +25°C -40°C to +85°C -40°C to +125°C +25°C -40°C to +85°C -40°C to +125°C +25°C -40°C to +85°C -40°C to +125°C +25°C -40°C to +85°C -40°C to +125°C +25°C -40°C to +85°C -40°C to +125°C
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 2.561 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
µA
EM6353 1.38
1.38
EM6353 1.57
1.57
EM6353 1.66
1.66
EM6353 1.80 Threshold voltage (note 3)
1.80
VTH
EM6353 2.20
2.20
V
EM6353 2.63
2.63
EM6353 2.93
2.93
EM6353 3.08
3.08
EM6353 4.40
4.40
EM6353 4.63 Threshold hysteresis Note 1: Note 3: VHYS
4.63 2.1% · VTH
TA=+25°C
V
Production tested at +25°C 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. 3 www.emmicroelectronic.com
Copyright 2002, EM Microelectronic-Marin SA
EM6353
Electrical Characteristics (continued)
Unless otherwise specified: VDD= 0.8V 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
Conditions
VDD from 0V to VTH (typ)+15% (note 2 and 4). TA= +25°C EM6353B EM6353A
Min
125 15.5 2 0.8 2 4 -
Typ
200 25 130 -
Max
224 28 255 0.3 0.3 0.3 0.3 0.3 0.3 0.5
Unit
ms µs
VDD drops from VTH (typ)+0.2V to VTH (typ)-0.2V (note 2). TA= +25°C VDD>1V IOL=100µA IOL=1.5mA IOL=3mA IOL=100µA IOL=1.5mA IOL=3mA IOH=-30µA IOH=-1.5mA IOH=-3mA VDD>2.5V VDD>5V VDD>1V
VOL
V
VOL Push-pull RESET / RESET Output voltage VOH Output leakage current Note 1: Note 2: Note 4: ILEAK
VDD>2.5V VDD>5V VDD>1V VDD>2.5V VDD>5V
V
Only for EM6353_Y (open-drain)
µA
Production tested at +25°C 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 VT H
Overdrive
VHYS
0.8V t logic "1" RESET logic "0" t logic "1"
tPOR tP
RESE RESETT
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. Copyright 2002, EM Microelectronic-Marin SA 4 www.emmicroelectronic.com
EM6353
Typical Operating Characteristics
(Typical values are at TA=+25°C 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 ] tP OR (°C) tPOR (25°C) [ 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 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)
Copyright 2002, EM Microelectronic-Marin SA 5 www.emmicroelectronic.com
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