EM6325-2.9中文资料
EM6325
Reset Circuit with Manual Reset
Description
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 V DD rises above V TH , 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.
Features
Manual reset function
200ms reset timeout period (1.6ms, 25ms, 1600ms on
request)
Ultra-low supply current of 2.9μA (V DD =3.3V) Operating temperature range: -40°C to +125°C
±1.5% reset threshold accuracy
11 reset threshold voltages V TH : 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
Immune to short negative V DD transients Guaranteed Reset valid down to 0.9V Threshold hysteresis: 2.1% of V TH
Very small SOT23-5L, SC70-5L and SC70-4L
Applications
Computers
Servers and workstations Modems
Wireless communication Metering Playstations PDA , Webpad
Automotive systems
EM MICROELECTRONIC - MARIN SA
Ordering Information
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
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, …).
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
Absolute Maximum Ratings Parameter Symbol Conditions Voltage at V DD to GND V DD -0.3V to +6V Minimum voltage at any signal pin V MIN GND - 0.3V Maximum voltage at any signal pin V MAX V DD + 0.3V
Electrostatic discharge max. to
MIL-STD-883C method 3015.7
with ref. to V SS
V ESD 2000V Max. soldering conditions T MAX 250°C x 10s Storage Temperature Range
T STG
-65°C to +150°C
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.
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 Symbol Min Max Unit
Supply voltage
V DD 0.9 5.5 V Operating Temperature
T A -40 +125 °C
Electrical Characteristics
Unless otherwise specified: V DD = 0.9V to 5.5V, T A =-40°C to +125°C (note 1). Parameter Symbol Conditions Min Typ Max Unit
+25°C -
4.6
V DD =1.5V
-40°C to +125°C -
2.3
7
+25°C -
5.5
V DD =3.3V -40°C to +125°C -
2.9
8.3
+25°C -
6.3 Supply current (note 2)
I DD
V DD =5.0V -40°C to +125°C -
3.4
9.6
μA
+25°C 1.290
1.330 -40°C to +85°C 1.245
1.382 EM6325 – 1.3
-40°C to +125°C 1.221
1.31 1.387
+25°C 1.359
1.401 -40°C to +85°C 1.311
1.456 EM6325 – 1.4
-40°C to +125°C 1.286
1.38 1.461
+25°C 1.546
1.594 -40°C to +85°C 1.492
1.656 EM6325 – 1.6
-40°C to +125°C 1.463
1.57 1.663
+25°C 1.635
1.685 -40°C to +85°C 1.577
1.751 EM6325 – 1.7
-40°C to +125°C 1.547
1.66 1.758
+25°C 1.773
1.827 -40°C to +85°C 1.710
1.899 EM6325 – 1.8
-40°C to +125°C 1.678
1.80 1.906
+25°C 2.167
2.233
-40°C to +85°C 2.090
2.321
EM6325 – 2.2
-40°C to +125°C 2.050
2.20 2.330
+25°C 2.591
2.669 -40°C to +85°C 2.499
2.775 EM6325 – 2.6
-40°C to +125°C 2.451
2.63 2.785
+25°C 2.886
2.974 -40°C to +85°C 2.784
3.091 EM6325 – 2.9
-40°C to +125°C 2.731
2.93
3.103
+25°C 3.034
3.126 -40°C to +85°C 2.926
3.249 EM6325 – 3.1
-40°C to +125°C 2.871
3.08 3.262
+25°C 4.334
4.466 -40°C to +85°C 4.180
4.642 EM6325 – 4.4
-40°C to +125°C 4.101
4.40 4.660
+25°C 4.561
4.699 -40°C to +85°C 4.399
4.885 Threshold voltage (note 3)
V TH EM6325 – 4.6
-40°C to +125°C 4.315
4.63 4.903
V Threshold hysteresis
V HYS
T A
=
+25°C - 2.1%?V TH
- 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 V DD falling.
Electrical Characteristics (continued)
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 t POR 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.
Timing Waveforms Array Note 6: t SEN = Maximum Transient Duration. Please refer to figure on the next page.
Note 7: Overdrive = V TH -V DD. 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 t POR (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 V SS 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 V SS to provide additional noise immunity (stronger external additional
pull-up resistor can also be added).
Typical Operating Characteristics
(Typical values are at T A =+25°C unless otherwise noted, MR , RESET and RESET open.)
I DD vs. Temperature Propagation Time t P vs. Temperature
Reset Timeout Period t POR vs. Temperature Maximum Transient Duration t SEN (normalized with respect to t POR 25°C )
vs. Overdrive V TH -V DD
Threshold Voltage Variation vs. Temperature (normalized)
Package Information
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