ETC ILC809RW

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ILC803/ILC809/ILC810
3-Pin µP Voltage Monitor
Description
• Precision Voltage Monitor for3V, 3.3V or 5V Power
Supplies
• 6µA Supply Current
• 140ms Minimum Reset Pulse Width
• RESET Remains Valid with VCC as Low as 1.4V
• Active Low Manual Reset Input
• No External Components
• 3-Pin SOT-23 Package
• 3-Pin SC70 package option
The ILC803, ILC809 and ILC810 are low cost
microprocessor supervisory circuits that assert a reset if the
power supply drops below a designated threshold. Several
different reset thresholds are available to accommodate
systems operating at 3V, 3.3V or 5V.
The ILC803 has an open drain output stage with active low
RESET output
The ILC809 has an active low RESET output, while the
ILC810 offers an active high RESET output. The reset output
is guaranteed to remain asserted for a minimum of 140ms
after VCC has risen above the designated reset threshold. The
ILC803, ILC809 and ILC810 are available in either a 3-Pin
SOT-23 package or a 3-Pin SC70 packages.
Applications
•
•
•
•
Critical Microprocessor Power Monitoring
Portable Equipment
Intelligent Instruments
Computers & Printers, Controllers
Typical Applications
V CC
V CC
V CC
ILC803
ILC809
ILC810
mP
RESET
(RESET)
RESET
INPUT
( ) = ILC810
Rev. 1.6
PRELIMINARY INFORMATION describes products that are in the design stage. Specifications
may change in any manner whatever without notice. Contact Fairchild Semiconductor for
current information.
©2001 Fairchild Semiconductor Corporation
Preliminary Information
Features
ILC803/ILC809/ILC810
Pin Assignments
Top View
GND 1
GND 1
ILC803
ILC809
RESET
3
2
V CC
RESET
3
ILC810
V CC
2
Pin Definitions
Preliminary Information
Pin Name
Pin Number
Description
ILC803
ILC809
ILC810
GND
1
1
1
RESET
2
2
N/A
RESET goes low if VCC falls below the reset threshold and
remains asserted for one reset timeout period (140ms min.)
after VCC exceeds the reset threshold.
RESET
N/A
N/A
2
RESET goes high if VCC falls below the reset threshold and
remains asserted for one reset timeout period (140ms min.)
after VCC exceeds the reset threshold.
VCC
4
3
3
Power supply input, 3V, 3.3V, or 5V
Ground Pin
Internal Block Diagram
V CC
3
Reset
Threshold (V)
+
-
Reset
Generator
RESET (ILC803, ILC809)
2
RESET (ILC810)
1
GND
Absolute Maximum Ratings
Parameter
Terminal Voltage
Input Current
Output Current
Rate of Rise
Operating Temperature Range
Storage Temperature Range
Symbol
Ratings
Units
VCC
-0.3 to 6.0
V
VCC
20
mA
RESET, RESET
20
mA
VCC
100
V/µs
TA
-40 to +85
°C
-65 to +150
°C
Lead Temperature (Soldering, 10 sec.)
300
°C
Power Dissipation
320
mW
Stresses above those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent device failure. Functionality at or
above these limits is not implied. Exposure to absolute maximum ratings for extended periods may affect device reliability.
Operating ranges define those limits between which the functionality of the device is guaranteed.
©2001 Fairchild Semiconductor Corporation
2
ILC803/ILC809/ILC810
Electrical Characteristics
VCC = 5V for ILC8_L/M/J, VCC = 3.3V for ILC8_S/T, V CC = 3V for ILC8_R, TA = Operating Temperature Range, unless otherwise noted.
Parameter
Operating Voltage Range
Supply Current, ICC
Reset Voltage Threshold, VTH
9
6
4.63
4.38
4.00
3.08
2.93
2.63
240
4.50
4.25
3.89
3.00
2.85
2.55
140
ISOURCE = 800µA, ILC809L/M/J
VCC - 1.5
ISOURCE = 500µA, ILC809R/S/T
0.8 x VCC
VCC= VTH Min., ISINK = 3.2mA, ILC809L/M/J
VCC= VTH Min., ISINK = 1.2mA, ILC809R/S/T
VCC > 1.4V, ISINK = 50µA, TA= 0°C to 70°C
VCC > 1.6V, ISINK = 50µA, TA= -40°C to 85°C
1.8V < VCC < VTH Min., ISOURCE = 150µA
0.8 x VCC
ISINK = 3.2mA, ILC810L/M/J
ISINK = 1.2mA, ILC810R/S/T
RESET Output Voltage, VOL
RESET Output Voltage, VOH
RESET Output Voltage, VOL
Circuit Description
Max.
5.5
5.5
15
10
Units
V
4.75
4.50
4.10
3.15
3.00
2.70
560
0.3
0.4
7
V
µA
ms
V
V
µA
V
0.4
0.3
0.3
0.3
0.4
0.3
V
V
V
Interfacing to Bi-directional Reset Pins
Microprocessor Reset
The RESET pin is asserted whenever VCC falls below the
reset threshold voltage. The reset pin remains asserted for a
period of 240ms after V CC has risen above the reset threshold voltage. The reset function ensures the microprocessor
is properly reset and powers up into a known condition after
a power failure. RESET will remain valid with V CC as low
as 1.4V.
VTH
tR
Typ.
VCC = VTH ISINK = 1.2mA
VCC = VTH ISINK = 3.2mA
VCC > VTH RESET Deasserted
RESET Open Drain Output
Leakage Current
RESET Output Voltage, VOH
VCC
Min.
1.4
1.6
The ILC803/ILC809/ILC810 can interface with mPs with bidirectional reset pins by connecting a 4.7kΩ resistor in series
with the ILC803/ILC809/ILC810 output and the mP reset
pin. ILC803 connects directly with a single pull-up resistor
(figure 2).
RESET Valid to 0V
A resistor can be added from the RESET pin to ground to
ensure the RESET output remains low with VCC down to 0V
A 100kΩ resistor connected from RESET to ground is recommended. The size of the resistor should be large enough
to not load the RESET output and small enough to pull-down
any stray leakage currents.
tR
VCC
RESET
V CC
VCC Transients
The ILC803, ILC809 and ILC810 are relatively immune to
negative-going VCC glitches below the reset threshold. Typically, a negative-going transient 125mV below the reset
threshold with a duration of 50ms (25ms for ILC8__R/S/T)
or less will not cause an unwanted reset.
V CC
100K
ILC803
only
Figure 1: Timing Diagram
ILC803
ILC809
mP
RESET
RESET
100K
ILC809
only
Figure 2: Reset valid to V CC
©2001 Fairchild Semiconductor Corporation
3
Preliminary Information
Reset Timeout Period, tR
RESET Output Voltage Low
(Active low ILC803/809) VOL
Conditions
TA = 0°C to 70°C
TA = -40°C to 85°C
ILC803L/M/J, ILC809L/M/J, ILC810L/M/J
VCC < 3.6V, ILC803R/S/T, ILC809R/S/T,
ILC810R/S/T
ILC803L, ILC809L, ILC810L
ILC803M, ILC809M, ILC810M
ILC803J, ILC809J, ILC810J
ILC803T, ILC809T, ILC810T
ILC803S, ILC809S, ILC810S
ILC803R, ILC809R, ILC810R
ILC803/ILC809/ILC810
Packaging Information
U Package, 3-Pin SOT-23
0.021
0.015
Preliminary Information
0.055
0.047
0.098
0.083
0.120
0.105
0.0059
0.0035
0.040
0.031
0.079
0.071
0-8°
0.010
0.005
0.004
0.001
W Package, 3-Pin SC70
.087 (2.2)
.071 (1.8)
.053 (1.35)
.045 (1.15)
.087 (2.2)
.079 (2.0)
.009 (.23)
.005 (.13)
.043 (1.1)
.032 (.80)
.004 (.10)
.010 (.25)
.004 (.10)
.016 (.40)
.012 (.30)
.026
(.65)
.052
(1.3)
4
.018 (.45)
.006 (.15)
©2001 Fairchild Semiconductor Corporation
ILC803/ILC809/ILC810
Tape and Reel Information
Diagram applies to SOT-23 and SC70
4.0 ± 0.1
2.0 ± 0.05
O1.5 ± 0.1
1.75 ± 0.1
3.5 ± 0.05
8.0 ± 0.3
Preliminary Information
O1.1 ± 0.1
4.0 ± 0.1
2.7 ± 0.1
1.2 ± 0.1
Dimensions are in millimeters
3.1 ± 0.1
Ordering Information
Product
Number
Package
Reset Threshold (V)
Device Suffix
Temp. Range
4.63
L
ILC803_U
3-Lead SOT-23
-40°C to +85°C
4.38
M
ILC809_U
3-Lead SOT-23
-40°C to +85°C
4.00
J
ILC810_U
3-Lead SOT-23
-40°C to +85°C
3.08
T
ILC803_W
3-Lead SC70
-40°C to +85°C
2.93
S
ILC809_W
3-Lead SC70
-40°C to +85°C
2.63
R
ILC810_W
3-Lead SC70
-40°C to +85°C
Place the device suffix of the desired reset threshold voltage from the
table [below] in the blank to complete the part number.
©2001 Fairchild Semiconductor Corporation
5
ILC803/ILC809/ILC810
Alternate Source Cross Reference Guide
Preliminary Information
Industry P/N
Device Markings Information
SC70 Case
SOT-23 Case
ILC Direct
Replacement
ILC803J
QJY
QJYY
MAX803XYUR-T
ILC803YU
ILC803L
QLY
QLYY
MAX809JEUR-T
ILC809JU
ILC803M
QMY
QMYY
MAX809LEUR-T
ILC809LU
ILC803R
QRY
QRYY
MAX809MEUR-T
ILC809MU
ILC803S
QSY
QSYY
MAX809REUR-T
ILC809RU
ILC803T
QTY
QTYY
MAX809SEUR-T
ILC809SU
ILC809J
VJY
VJYY
MAX809TEUR-T
ILC809TU
ILC809L
VLY
VLYY
MAX810JEUR-T
ILC810JU
ILC809M
VMY
VMYY
MAX810LEUR-T
ILC810LU
ILC809R
VRY
VRYY
MAX810MEUR-T
ILC810MU
ILC809S
VSY
VSYY
MAX810REUR-T
ILC810RU
ILC809T
VTY
VTYY
MAX810SEUR-T
ILC810SU
ILC810J
ZJY
ZJYY
MAX810TEUR-T
ILC810TU
ILC810L
ZCY
ZCYY
ILC810M
ZMY
ZMYY
ILC810R
ZRY
ZRYY
ILC810S
ZSY
ZSYY
ILC810T
ZTY
ZTYY
Y-LOT CODE
YY-LOT CODE
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO
ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME
ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN;
NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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2001 Fairchild Semiconductor Corporation