MicroPower Microprocessor Reset Circuit with Manual Reset
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
APR3101/2/3
www.anpec.com.tw1
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise
customers to obtain the latest version of relevant information to verify before placing orders.
Features General Description
Applications
••
••
• 1.2V to 6V Input Voltage Range
••
••
• Low Quiescent Current : less Than 1.5 µA
••
••
• High accuracy detection threshold : ±1.5%
••
••
• Fixed trimmed reset thresholds for 1.5V, 1.75V,
2.32V, 2.63V, 2.93V, 3.08V, 3.9V, 4.38V.
••
••
• Manual Reset Input
••
••
• Reset Timeout Period 250ms
••
••
• Available output configurations
- Open-drain output
- CMOS active high output
- CMOS active low output
••
••
• SOT-23-5 package
••
••
• No external components
Pin Configuration
°
The APR3101/2/3 are designed to monitor voltage
supplies in µP and digital systems. The quiescent
current is extremely low, typically 1.5 µA, making it
ideal for portable battery operated equipment. The
APR3101/2/3 operate by monitoring the system power
supply voltage. When the input voltage drops below a
fixed threshold or whenever manual reset is asserted,
the device asserts a reset signal for a fixed time pe-
riod after Vcc rises above the fixed threshold or manual
reset is deasserted. The APR3101/2/3 series is avail-
able with three output stage versions:APR3101 push-
pull active low output, APR3102 push-pull active high
output and APR3103 open drain active low output. The
APR3101/2/3 also have a debounced manual reset
input that is provided to override the reset monitor.
They are also designed to reject fast line transient
glitches on Vcc. The APR3101/2/3 are come in a
miniature SOT-23-5 package.
NCGND
MRVCC
123
45
(3101/3)
(3102)
Reset
Reset
SOT-23-5 (Top View)
•Computers
•Cell Phones
•Portable Electronics
•µP Power Supply Monitoring
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
APR3101/2/3
www.anpec.com.tw2
Ordering and Marking Information
Pa ckage Code
B : SOT-23-5
Temp. Range
C : 0 to 7 0 C I : -4 0 to 8 5 C
Ha ndling C ode
TR : Tape & R eel
Vo ltage Code :
15 : 1.5V ~ 50 : 5.0 V
A P R3 1 0 1 /2/3 -
Ha ndling C ode
Temp. Range
Pa ckage Code
Vo ltage Code
Date Code
X X
Vo ltage Code
A 1/2 /3
AP R31 01/2/3 B :
A:1.5V B :1.75V C:2.32V D :2.63V E :2.93V F:3.08 V G :3.9V H:4.3 8V
Absolute Maximum Ratings
Symbol Parameter Value Unit
VCC V
CC to GND -0.3 to 6 V
RESET to GND (Push-Pull Output) -0.3 to VCC +0.3
VRESET RESET to GND (Open Drain Output) -0.3 to 6 V
ICC, IMR Maximum Continuous Input Current 20 mA
IRESET RESET/RESET Current 20 mA
dVcc/dt Rate of Rise of VCC 100
V/µs
TJ Junction Temperature Range -40 to 150 °C
TL Lead Temperature (Soldering, 10 second) 260 °C
RTH,JA Thermal Resistance – Junction to Ambient 357 °C/W
PD Power Dissipation Internally Limited W
TSTG Storage Temperature Range -65 to +150 °C
Pin Function Descrpition
PIN
No. Name Description
1 GND Ground connection
2 NC No internal connection
RESET
(APR3101/3) RESET output remains low while VCC is below the reset threshold and remains
so for a fixed time period after VCC raises above the reset threshold.
3 RESET
(APR3102) RESET output remains high while VCC is below the reset threshold and remains
so for a fixed time period after VCC raises above the reset threshold.
4 MR
Manual Reset active low input. A logic low signal on MR asserts a reset
condition. Asserted reset continues as long as MR is low and for a fixed time
period after MR returns high.
5 VCC Supply Voltage (+1.2V to +6V)
Note: The pin sequence here might not be correct for all different package types, and please refer pin
configuration in page1 for correct pin assignment.
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
APR3101/2/3
www.anpec.com.tw3
Block Diagram
Vc c
MR
GND
VREF
Reset
Generator
+ Timer
Oscillator
RESET
APR3102
Vc c
MR
GND
VREF
Reset
Generator
+ Timer
Oscillator
RESET
APR3101
Vc c
MR
GND
VREF
Reset
Generator
+ Timer
Oscillator
RESET
APR3103
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
APR3101/2/3
www.anpec.com.tw4
Part Number Part Description
APR 31 01 Reset Output Push P ull Active Low wi th De lay
APR 3102 Reset Output Pu sh Pull Active High w ith Delay
APR31 03 Reset Output Open Drain Active Low w ith Delay
APR3101/2/3
Symbol Parameter Test Conditions Min. Typ. Max.
Unit
VCC Supply Voltage 1.2 6
V
ICC Supply Current VCC=1.5V~6V 1.5 4
µA
T
A=-40 to 85°C 3 5
T A=25°C ±1.5%
VTH Reset Threshold T A=-40 to 85°C ±2%
VHYST Hysteresis Range 20 mV
TRTP Reset Timeout Period 150 250 350
ms
VOL Reset Output Low ISINK=1.2mA 0.5 V
VOH Reset Output High ISOURCE=0.6mA 0.8*VCC
TD VCC to Reset Delay VCC=VTH to (VTH-100mV) 25
µS
ILE Reset Output Leakage 0.5 µA
TMPW MR Minimum Pulse Width 10 µS
TMRD MR to Reset Delay 0.5 µS
VMIL MR Input Low Threshold 0.4* VCC V
VMIH MR Input High Threshold 0.5* VCC
RMR MR Pull-Up resistance 30 47 70
KΩ
Application Circuit
VCC VCC
GND
100k
APR3103 RESET RESET
INPUT µP
VCC
GND
Part Number Description
Electrical Characteristics
VIN = 5V, TA = -40 to 85°C unless otherwise noted. T ypical values are at TA=25°C, VCC = 5V for 4.38V
versions, VCC = 3.3V for 3.08/2.93V versions, VCC = 3.0V for 2.63V. versions and VCC = 2.5V for 2.32V
versions, VCC = 2.0V for 1.75V versions , VCC = 1.8V for 1.5V versions.
VCC VCC
GND
RESET
(RESET) RESET
INPUT µP
VCC
GND
APR3101
APR3102
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
APR3101/2/3
www.anpec.com.tw5
Vcc
MR
RESET
Res et Tim eout P eriod 250ms
M R t o Res et Delay 0.5us
V c c t o Res et Delay 25us
Res et Thres hold Res et Thres hold
Res et Tim eout P eriod 250ms
RESET
(APR3102)
(APR3101/3)
Timing Chart
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
APR3101/2/3
www.anpec.com.tw6
0
5
10
15
20
25
30
35
40
45
50
0123456
Vcc=2.9V
Vcc=2V
Vcc=2.5V
Vcc=1.5
0
10
20
30
40
50
60
70
0123456
Vcc=4V
Vcc=3V
Vcc=5V
0
0.4
0.8
1.2
1.6
2
0123456 0
20
40
60
80
100
120
10 100 1000
Typical Characteristics
Supply Current vs. Supply V oltage
Supply Current (uA)
Supply Voltage (V)
Maximum T ransient Duration vs.
Reset Threshold Overdrive VTH - VCC
Reset Threshold Overdrive VTH - VCC (mV)
Maximum T ransient Duration (us)
Output Source Current vs. Reset High Output Voltage
Reset High Output V oltage (V)
Output Source Current (mA)
Output Sink Current vs. Reset Low Output V oltage
Reset Low Output V oltage (V)
Output Sink Current (mA)
generate a reset signal
never generate a reset signal
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
APR3101/2/3
www.anpec.com.tw7
0
0.5
1
1.5
2
2.5
3
3.5
-40-200 20406080100120
Vcc=3V
Vcc=5V
0
100
200
300
400
500
600
-40-200 20406080100120
0.994
0.996
0.998
1
1.002
1.004
1.006
1.008
-40 -20 0 20 40 60 80 100 120 0
10
20
30
40
50
60
-40-200 20406080100120
VOD=100mV
Typical Characteristics
Normalized Reset Threshold vs. Temperature
Temperature (°C)
Normalized Reset Threshold (%)
Supply Current vs. Temperature Reset T imeout Period vs. Temperature
Reset Propagation Delay vs. Temperature
Reset Propagation Delay (us)
Temperature (°C)
Temperature (°C)
Reset T imeout Period (ms)
Temperature (°C)
Supply Current (uA)
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
APR3101/2/3
www.anpec.com.tw8
Typical Characteristics
Power Up
Vcc(2V/div)
RESET(2V/div)
MR(2V/div)
RESET(2V/div)
MR(2V/div)
Vcc(2V/div)
Time (50ms/div) Time (500ms/div)
Power Down
Vcc(2V/div)
RESET(2V/div)
MR(2V/div)
Time (0.2us/div)
MR to Reset Delay
Time (10us/div)
Vcc to RESET Delay
Vcc(0.5V/div)
Vcc=VTH to (VTH-100mV)
RESET(2V/div)
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
APR3101/2/3
www.anpec.com.tw9
Time (100ms/div)
Typical Characteristics
Manual Reset
Vcc(2V/div)
RESET(2V/div)
MR(2V/div)
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
APR3101/2/3
www.anpec.com.tw10
RESET
VCC
GND
VCC
100K
Application Information
VCC Transient R ejection
The APR3101/2/3 have the function to reject the tran-
sient glitches from the power line. The Maximum Tran-
sient Duration vs. Reset Threshold Overdrive shows
at Typical Characteristics. The transient voltage with
the duration under the curve will not generate a reset
signal, e.g. a transient of 100mV below the reset
threshold voltage have the duration more than 35us, it
will generate a reset signal. Connect a 0.1uF bypass
capacitor to the VCC pin can improve the transient
immunity.
Manual Reset Input
The APR3101/2/3 have 3 output stage versions:
APR3101 is an active low push-pull output,when the
VCC drops below the reset threshold or MR goes low,
the RESET output generates a low signal. APR3102
is an active high push-pull output, when the VCC drops
below the reset threshold or MR goes low; the RE-
SET output generates a high signal (see Timing Chart).
APR3103 is an active low open drain output, the RE-
SET output must be connected a pull-up resistor to a
supply voltage that is lower than 6V, it suits to use in
multiple voltage systems (see Figure 2). The APR3101
RESET output is valid until the VCC=1.2V, below 1.2V
the IC is shutdown, and the output becomes a floating
state. If it is a trouble, a resistor should be connected
from reset output to ground to keep the reset output
low (see Figure 1). For The APR3102, a pull-up resis-
tor to VCC is required to keep the valid reset output for
VCC below 1.2V.(
Figure 1. Ensuring RESET Valid to VCC = 0 V
Reset Output VCC
APR3103
RESET
GND
MR
+3.3V +5.0V
VCC
GND
RESET
INPUT 5V
System
100k
Figure 2. APR3103 Open Drain Output with Multiple
Supplies
Force the MR low asserts the reset signal, asserted
reset continues as long as MR is low and after the
MR goes high the reset signal is maintained for a fixed
timeout period. The MR is internally connected a 47kΩ
resistor to VCC, so it can be floating if MR is not used.
The MR input also has a debounce time 500ns to avoid
the glitches. It allows use of a mechanical switch or a
TTL, and CMOS logic signal.
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
APR3101/2/3
www.anpec.com.tw11
Packaging Information
SOT-23-5
e1
E1 E
b
12 3
45
e
D
A2 A
A1 L 2 L
L 1
a
Millimeters Inches
Dim Min. Max. Min. Max.
A 0.95 1.45 0.037 0.057
A1 0.05 0.15 0.002 0.006
A2 0.90 1.30 0.035 0.051
D2.83.00
0.110 0.118
E2.63.00
0.102 0.118
E1 1.5 1.70 0.059 0.067
L 0.35 0.55 0.014 0.022
L1 0.20 BSC 0.008 BSC
L2 0.5 0.7 0.020 0.028
N5 5
α0°10°0°10°
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
APR3101/2/3
www.anpec.com.tw12
Physical Specifications
Reference JEDEC Standard J-STD-020A APRIL 1999
Reflow Condition (IR/Convection or VPR Reflow)
Pre-heat temperature
183 C
Peak temperature
Time
°
temperature
Classi fica tion Reflow Profiles
Convect ion or I R/
Convection VPR
Average ramp -up rate(183°C to Peak) 3°C/second max. 10 °C /second max.
Preheat temperature 125 ± 25°C) 120 seconds max
Temperature maintained above 183°C60 – 150 sec onds
Time within 5°C of actual peak temperature 10 –20 seconds 60 sec onds
Peak tem perature range 220 +5/-0 °C or 235 +5/ -0°C 215-219°C or 235 +5/-0 °C
Ramp-down rate 6 °C /seco nd max. 10 °C /second max.
Ti me 25°C to peak temp erature 6 minutes max .
Package Reflow Conditions
pkg. thickness ≥
≥≥
≥ 2.5mm
and all bgas pkg. thickness < 2.5mm and
pkg. volume ≥
≥≥
≥ 350 mm³ pkg. thickness < 2.5mm and pkg.
volume < 350mm³
Convection 220 +5/- 0 °C Convection 235 +5/-0 °C
VPR 215-219 °C VPR 235 +5/-0 °C
IR/Conv ection 220 +5/ -0 °C IR/Conv ection 235 +5/-0 °C
Term ina l Mater ial Solder-P lated Cop p er (S o lder Material : 90/10 or 6 3/37 Sn Pb)
Lead S o lde rability Me ets E IA Spec ification RSI8 6- 91, A NS I/J-STD -002 C atego ry 3.
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
APR3101/2/3
www.anpec.com.tw13
Relia b ility te s t pro g r am
Test item M ethod Descrip tio n
SOLDERABILITY MIL-STD-883D-2003 245°C , 5 SEC
HOLT MIL-STD-883D-1005.7 1000 H rs Bias @ 125 °C
PCT JESD-22-B, A102 168 Hrs, 100 % RH , 121°C
TST MIL-STD-883D-1011.9 -65°C ~ 150°C , 200 C ycles
ESD M IL-STD-883D-3015.7 VHBM > 2KV, VM M > 200V
L a tc h-Up J ES D 78 1 0 ms , Itr > 100m A
Carrier Tape
A
J
B
T2
T1
C
t
Ao
E
W
Po P
Ko
Bo
D1
D
F
P1
A
pp
lication A B C J T1 T2 W P E
178±172
± 1.0 13.0 + 0.2 2.5 ± 0.15 8.4 ± 2 1.5± 0.3 8.0+ 0.3
- 0.3 4 ± 0.1 1.75± 0.1
F D D1 Po P1 Ao Bo Ko t
SOT-23-5
3.5 ± 0.0 5 1.5 +0.1 1.5 +0.1 4.0 ± 0.1 2.0 ± 0.1 3.15 ± 0.1 3.2± 0.1 1.4± 0.1 0.2±0.03
Copyright ANPEC Electronics Corp.
Rev. A.2 - Oct., 2003
APR3101/2/3
www.anpec.com.tw14
Application Carrier W idth Cover Tap e Width Devices Per Reel
SOT- 23 8 5.3 3000
Cover Tape Dimensions
Anpec Electronics Corp.
Head Office :
5F, No. 2 Li-Hsin Road, SBIP,
Hsin-Chu, Taiwan, R.O.C.
Tel : 886-3-5642000
Fax : 886-3-5642050
Taipei Branch :
7F, No. 137, Lane 235, Pac Chiao Rd.,
Hsin T ien City, Taipei Hsien, Taiwan, R. O. C.
Tel : 886-2-89191368
Fax : 886-2-89191369
Customer Service
