AME, Inc.
1
AME8550 V oltage Detector
n Functional Block Diagram
l Highly accurate: + 2%
l Low power consumption: TYP 0.8µA
(VDD=1.5V)
l Detect voltage range: 1.6V to 6.0V in 0.1V
increments
l Operating voltage range: 1.2V to 6.5V
l Detect voltage temperature characteristics:
TYP ±100ppm/oC
l Output configuration: N-channel open drain or
CMOS
l Ultra small package :
SOT-23 (150mW)
SOT-25 (150mW)
SOT-89 (500mW)
SC-70 (100mW)
l Add an external capacitor to perform an
µP reset.
The AME8550 series are highly precise, low power con-
sumption voltage detectors, manufactured using CMOS
and fuse trimming technologies. Detect voltage is ex-
tremely accurate with minimal temperature drift.
Both CMOS and N channel open drain output configu-
rations are available.
l Microprocessor reset circuitry
l Memory battery back-up circuits
l Power-on reset circuits
l Power failure detection
l System battery life and charge voltage
monitors
n General Description
n Features
n Applications
(1) CMOS Output without delay
(2) Nch Open Drain Output without delay
(3) CMOS Output with delay
(4) Nch Open Drain Output with delay
VDD
VOUT
VSS
BG
Vref
VDD
VOUT
VSS
BG
Vref
VDD
VOUT
VSS
CD
VDD
I
BG
Vref
VTH=VREF
I
VOUT
VSS
CD
VDD
VDD
BG
Vref
VTH=VREF
AME, Inc.
2
V oltage Detector
AME8550
n Pin Configuration
AME8550AEETXXXX
1. VOUT
2. Vss
3. VDD
AME8550AEEVXXXX
1. VOUT
2. VDD
3. Vss
4. CD
5. NC
SOT-23
Top View AME8550AEFTXXXX
1. VOUT
2. VDD
3. Vss
SOT-89
Top View
SOT-25
Top View AME8550BEEVXXXX
1. VOUT
2. VDD
3. Vss
4. NC
5. CD
12
3
AME8550
n Pin Description
132
54
AME8550
SOT-25
Top View
AME8550CEEVXXXX
1. VOUT
2. VDD
3. Vss
4. NC
5. NC
SOT-25
Top View
132
AME8550
132
54
AME8550
132
54
AME8550
12
3
AME8550
SC70-3
Top View
AME8550AEITXXXX
1. VSS
2. VOUT
3. VDD
Pin Name Pin Des c r ipt ion
VDD S upply V ol tage Input
VSS Ground
VOUT Output
NC No Co n ne cti on
CD Connec t an ex ternal capac i t or when delay func ti on i s
needed
ll
ll
l Without Delay T ime
ll
ll
l With Delay Time
AME, Inc.
3
AME8550 V oltage Detector
n Ordering Information
AME8550 x x x x x xxx x
Package Type
Operating Temperature
Pin Out Configuration
Number of Pins
Detect Voltage
Special Feature
Output Options
l Without Delay Time
A1. VO UT E:-40
O
C to 85
O
C
E:SOT-2X T: 3 A: CMOS output without delay 190
:
V=1 .9V L: Low profi le
(SOT-23) 2. VS S F: SOT-89 V: 5 B: Open-Drain output without 200
:
V=2 .0V Y: Lead free
3. VDD delay 220
:
V=2 .2V & Low profile
230
:
V=2 .3V Z: Lead free
A1. VO UT 240
:
V=2. 4V
(SOT-89) 2. VDD 250
:
V=2. 5V
3. VS S 263
:
V=2. 63V
270
:
V=2. 7V
A1. VSS 280
:
V=2. 8V
(SC70-3) 2. V OUT 360
:
V=3. 6V
3. VDD 370
:
V=3. 7V
420
:
V=4. 2V
C 1. VOUT 440
:
V=4. 4V
(SOT-25) 2. VDD 460
:
V=4. 6V
3. VS S
4. NC
5. NC
Package
Type
Number
of
Pins
Operating
Temperature
Range
Pin
Configuration Ou tp ut Op tion s Special
Feature
Detect
Voltage
AME, Inc.
4
V oltage Detector
AME8550
AME8550 x x x x x xxx x
Package Type
Operating Temperature
Pin Out Configuration
Number of Pins
Detect Voltage
Special Feature
Output Options
n Ordering Information
l With Delay Time
A1. VOUT E:-40
O
C to 85
O
C
E:SOT-2X T: 3 C: CM O S o utput with de l ay 190
:
V =1. 9V L: Lo w profi l e
(SOT-25) 2. V DD F: SOT-89 V: 5 D: Open-Drain out put wit h 200
:
V =2. 0V Y : Lead fre e
3. V S S delay 220
:
V =2. 2V & Low profil e
4. CD 230
:
V =2. 3V Z: Lead fre e
5. NC 240
:
V =2. 4V
250
:
V =2. 5V
B1. VOUT 26 3
:
V =2. 63V
2. VDD 270
:
V =2. 7V
3. VS S 280
:
V =2. 8V
4. NC 360
:
V =3. 6V
5. CD 370
:
V =3. 7V
420
:
V =4. 2V
440
:
V =4. 4V
460
:
V =4. 6V
Output Opti o ns Detect
Voltage Special
Feature
Pin
Configuration
Operating
Temperature
Range
Package
Type
Number
of
Pins
AME, Inc.
5
AME8550 V oltage Detector
n Ordering Information (contd.)
Part Number Marking O utput Voltage Package Operating Temp. Range
AME8550AEEVC190 AXOww 1.9V SOT-25 -40oC to +85oC
AME8550AEEVC190L AXOww 1.9V SOT-25 -40oC to +85oC
AME8550AEEVC190Z AXOww 1.9V SOT-25 -40oC to +85oC
AME8550AEEVC190Y AXOww 1.9V SOT-25 -40oC to +85oC
AME8550BEEVC190 AXPww 1.9V SOT-25 -40oC to +85oC
AME8550BEEVC190L AXPww 1.9V SOT-25 -40oC to +85oC
AME8550BEEVC190Z AXPww 1.9V SOT-25 -40oC to +85oC
AME8550BEEVC190Y AXPww 1.9V SOT-25 -40oC to +85oC
AME8550AEETB210 AXQww 2.1V SOT-23 -40oC to +85oC
AME8550AEETB210L AXQww 2.1V SOT-23 -40oC to +85oC
AME8550AEETB210Z AXQww 2.1V SOT-23 -40oC to +85oC
AME8550AEETB210Y AXQww 2.1V SOT-23 -40oC to +85oC
AME8550AEFTB210 A8550A
B210ww 2.1V SOT-89 -40oC to +85oC
AME8550AEFTB210Z A8550A
B210ww 2.1V SOT-89 -40oC to +85oC
AME8550CEEVB210 AXRww 2.1V SOT-25 -40oC to +85oC
AME8550CEEVB210L AXRww 2.1V SOT-25 -40oC to +85oC
AME8550CEEVB210Z AXRww 2.1V SOT-25 -40oC to +85oC
AME8550CEEVB210Y AXRww 2.1V SOT-25 -40oC to +85oC
AME8550AEETA220 AWHww 2.2V SOT-23 -40oC to +85oC
AME8550AEETA220L AWHww 2.2V SOT-23 -40oC to +85oC
AME8550AEETA220Z AWHww 2.2V SOT-23 -40oC to +85oC
AME8550AEETA220Y AWHww 2.2V SOT-23 -40oC to +85oC
AME8550AEFTA220 A8550A
A220ww 2.2V SOT-89 -40oC to +85oC
AME8550AEFTA220Z A8550A
A220ww 2.2V SOT-89 -40oC to +85oC
AME8550AEITA220 AXKw 2.2V SC70-3 -40oC to +85oC
AME8550AEITA220Z AXKw 2.2V SC70-3 -40oC to +85oC
AME, Inc.
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V oltage Detector
AME8550
n Ordering Information (contd.)
Part Number Marking O utput Voltage Package Operating Temp. Range
AME8550AEETB240 AXVww 2.4V SOT-23 -40oC to +85oC
AME8550AEETB240L AXVww 2.4V SOT-23 -40oC to +85oC
AME8550AEETB240Z AXVww 2.4V SOT-23 -40oC to +85oC
AME8550AEETB240Y AXVww 2.4V SOT-23 -40oC to +85oC
AME8550AEFTB240 A8550A
B240ww 2.4V SOT-89 -40oC to +85oC
AME8550AEFTB240Z A8550A
B240ww 2.4V SOT-89 -40oC to +85oC
AME8550CEEVB240 AXWww 2.4V SOT-25 -40oC to +85oC
AME8550CEEVB240L AXWww 2.4V SOT-25 -40oC to +85oC
AME8550CEEVB240Z AXWww 2.4V SOT-25 -40oC to +85oC
AME8550CEEVB240Y AXWww 2.4V SOT-25 -40oC to +85oC
AME8550AEEVD240 AXXww 2.4V SOT-25 -40oC to +85oC
AME8550AEEVD240L AXXww 2.4V SOT-25 -40oC to +85oC
AME8550AEEVD240Z AXXww 2.4V SOT-25 -40oC to +85oC
AME8550AEEVD240Y AXXww 2.4V SOT-25 -40oC to +85oC
AME8550BEEVD240 AXYww 2.4V SOT-25 -40oC to +85oC
AME8550BEEVD240L AXYww 2.4V SOT-25 -40oC to +85oC
AME8550BEEVD240Z AXYww 2.4V SOT-25 -40oC to +85oC
AME8550BEEVD240Y AXYww 2.4V SOT-25 -40oC to +85oC
AME8550AEETB250 AXZww 2.5V SOT-23 -40oC to +85oC
AME8550AEETB250L AXZww 2.5V SOT-23 -40oC to +85oC
AME8550AEETB250Z AXZww 2.5V SOT-23 -40oC to +85oC
AME8550AEETB250Y AXZww 2.5V SOT-23 -40oC to +85oC
AME8550AEFTB250 A8550A
B250ww 2.5V SOT-89 -40oC to +85oC
AME8550AEFTB250Z A8550A
B250ww 2.5V SOT-89 -40oC to +85oC
Note: ww represents the date code / w represents date code ( A thru Z ) : 2 work weeks per character .
* A line on top of the first letter represents lead free plating such as AME8550
Please consult AME sales office or authorized Rep./Distributor for the availability of output voltage and package type .
AME, Inc.
7
AME8550 V oltage Detector
n Ordering Information (contd.)
Part Number M ar ki ng O ut put Vol t age Package O per ating Temp. Range
AME8550CEEVB250 AYAww 2.5V SOT-25 -40oC to +85oC
AME8550CEEVB250L AYAww 2.5V SOT-25 -40oC to +85oC
AME8550CEEVB250Z AYAww 2.5V SOT-25 -40oC to +85oC
AME8550CEEVB250Y AYAww 2.5V SOT-25 -40oC to +85oC
AME8550AEEVD260 AYVww 2.6V SOT-25 -40oC to +85oC
AME8550AEEVD260L AYVww 2.6V SOT-25 -40oC to +85oC
AME8550AEEVD260Z AYVww 2.6V SOT-25 -40oC to +85oC
AME8550AEEVD260Y AYVww 2.6V SOT-25 -40oC to +85oC
AME8550BEEVD260 AYWww 2.6V SOT-25 -40oC to +85oC
AME8550BEEVD260L AYWww 2.6V SOT-25 -40oC to +85oC
AME8550BEEVD260Z AYWww 2.6V SOT-25 -40oC to +85oC
AME8550BEEVD260Y AYWww 2.6V SOT-25 -40oC to +85oC
AME8550AEETA270 AWIww 2.7V SOT-23 -40oC to +85oC
AME8550AEETA270L AWIww 2.7V SOT-23 -40oC to +85oC
AME8550AEETA270Z AWIww 2.7V SOT-23 -40oC to +85oC
AME8550AEETA270Y AWIww 2.7V SOT-23 -40oC to +85oC
AME8550AEFTA270 A8550A
A270ww 2.7V SOT-89 -40oC to +85oC
AME8550AEFTA270Z A8550A
A270ww 2.7V SOT-89 -40oC to +85oC
AME8550AEITA270 AXNw 2.7V SC70-3 -40oC to +85oC
AME8550AEITA270Z AXNw 2.7V SC70-3 -40oC to +85oC
AME8550AEETB270 AWVww 2.7V SOT-23 -40oC to +85oC
AME8550AEETB270L AWVww 2.7V SOT-23 -40oC to +85oC
AME8550AEETB270Z AWVww 2.7V SOT-23 -40oC to +85oC
AME8550AEETB270Y AWVww 2.7V SOT-23 -40oC to +85oC
AME8550AEFTB270 A8550A
B270ww 2.7V SOT-89 -40oC to +85oC
AME8550AEFTB270Z A8550A
B270ww 2.7V SOT-89 -40oC to +85oC
AME, Inc.
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V oltage Detector
AME8550
n Ordering Information (contd.)
Part Number M ar ki ng O ut put Vol t age Package O per ating Temp. Range
AME8550CEEVB270 AYSww 2.7V SOT-25 -40oC to +85oC
AME8550CEEVB270L AYSww 2.7V SOT-25 -40oC to +85oC
AME8550CEEVB270Z AYSww 2.7V SOT-25 -40oC to +85oC
AME8550CEEVB270Y AYSww 2.7V SOT-25 -40oC to +85oC
AME8550AEEVD270 AYXww 2.7V SOT-25 -40oC to +85oC
AME8550AEEVD270L AYXww 2.7V SOT-25 -40oC to +85oC
AME8550AEEVD270Z AYXww 2.7V SOT-25 -40oC to +85oC
AME8550AEEVD270Y AYXww 2.7V SOT-25 -40oC to +85oC
AME8550BEEVD270 AYYww 2.7V SOT-25 -40oC to +85oC
AME8550BEEVD270L AYYww 2.7V SOT-25 -40oC to +85oC
AME8550BEEVD270Z AYYww 2.7V SOT-25 -40oC to +85oC
AME8550BEEVD270Y AYYww 2.7V SOT-25 -40oC to +85oC
AME8550AEETB280 AYBww 2.8V SOT-23 -40oC to +85oC
AME8550AEETB280L AYBww 2.8V SOT-23 -40oC to +85oC
AME8550AEETB280Z AYBww 2.8V SOT-23 -40oC to +85oC
AME8550AEETB280Y AYBww 2.8V SOT-23 -40oC to +85oC
AME8550AEFTB280 A8550A
B280ww 2.8V SOT-89 -40oC to +85oC
AME8550AEFTB280Z A8550A
B280ww 2.8V SOT-89 -40oC to +85oC
AME8550CEEVB280 AYCww 2.8V SOT-25 -40oC to +85oC
AME8550CEEVB280L AYCww 2.8V SOT-25 -40oC to +85oC
AME8550CEEVB280Z AYCww 2.8V SOT-25 -40oC to +85oC
AME8550CEEVB280Y AYCww 2.8V SOT-25 -40oC to +85oC
AME8550AEEVC290 AYDww 2.9V SOT-25 -40oC to +85oC
AME8550AEEVC290L AYDww 2.9V SOT-25 -40oC to +85oC
AME8550AEEVC290Z AYDww 2.9V SOT-25 -40oC to +85oC
AME8550AEEVC290Y AYDww 2.9V SOT-25 -40oC to +85oC
AME, Inc.
9
AME8550 V oltage Detector
n Ordering Information (contd.)
Part Number M ar ki ng O ut put Vol t age Package O per ating Temp. Range
AME8550BEEVC290 AYEww 2.9V SOT-25 -40oC to +85oC
AME8550BEEVC290L AYEww 2.9V SOT-25 -40oC to +85oC
AME8550BEEVC290Z AYEww 2.9V SOT-25 -40oC to +85oC
AME8550BEEVC290Y AYEww 2.9V SOT-25 -40oC to +85oC
AME8550AEETA300 AYFww 3.0V SOT-23 -40oC to +85oC
AME8550AEETA300L AYFww 3.0V SOT-23 -40oC to +85oC
AME8550AEETA300Z AYFww 3.0V SOT-23 -40oC to +85oC
AME8550AEETA300Y AYFww 3.0V SOT-23 -40oC to +85oC
AME8550AEFTA300 A8550A
A300ww 3.0V SOT-89 -40oC to +85oC
AME8550AEFTA300Z A8550A
A300ww 3.0V SOT-89 -40oC to +85oC
AME8550CEEVA300 AYGww 3.0V SOT-25 -40oC to +85oC
AME8550CEEVA300L AYGww 3.0V SOT-25 -40oC to +85oC
AME8550CEEVA300Z AYGww 3.0V SOT-25 -40oC to +85oC
AME8550CEEVA300Y AYGww 3.0V SOT-25 -40oC to +85oC
AME8550AEETB340 AYHww 3.4V SOT-23 -40oC to +85oC
AME8550AEETB340L AYHww 3.4V SOT-23 -40oC to +85oC
AME8550AEETB340Z AYHww 3.4V SOT-23 -40oC to +85oC
AME8550AEETB340Y AYHww 3.4V SOT-23 -40oC to +85oC
AME8550AEFTB340 A8550A
B340ww 3.4V SOT-89 -40oC to +85oC
AME8550AEFTB340Z A8550A
B340ww 3.4V SOT-89 -40oC to +85oC
AME8550CEEVB340 AYIww 3.4V SOT-25 -40oC to +85oC
AME8550CEEVB340L AYIww 3.4V SOT-25 -40oC to +85oC
AME8550CEEVB340Z AYIww 3.4V SOT-25 -40oC to +85oC
AME8550CEEVB340Y AYIww 3.4V SOT-25 -40oC to +85oC
AME, Inc.
10
V oltage Detector
AME8550
n Ordering Information (contd.)
Part Number M ar ki ng Output Voltage Package Oper at i ng Temp. Range
AME8550AEEVD360 AYJww 3.6V SOT-25 -40oC to +85oC
AME8550AEEVD360L AYJww 3.6V SOT-25 -40oC to +85oC
AME8550AEEVD360Z AYJww 3.6V SOT-25 -40oC to +85oC
AME8550AEEVD360Y AYJww 3.6V SOT-25 -40oC to +85oC
AME8550BEEVD360 AYKww 3.6V SOT-25 -40oC to +85oC
AME8550BEEVD360L AYKww 3.6V SOT-25 -40oC to +85oC
AME8550BEEVD360Z AYKww 3.6V SOT-25 -40oC to +85oC
AME8550BEEVD360Y AYKww 3.6V SOT-25 -40oC to +85oC
AME8550AEETB440 AYLww 4.4V SOT-23 -40oC to +85oC
AME8550AEETB440L AYLww 4.4V SOT-23 -40oC to +85oC
AME8550AEETB440Z AYLww 4.4V SOT-23 -40oC to +85oC
AME8550AEETB440Y AYLww 4.4V SOT-23 -40oC to +85oC
AME8550AEFTB440 A8550A
B440ww 4.4V SOT-89 -40oC to +85oC
AME8550AEFTB440Z A8550A
B440ww 4.4V SOT-89 -40oC to +85oC
AME8550CEEVB440 AYMww 4.4V SOT-25 -40oC to +85oC
AME8550CEEVB440L AYMww 4.4V SOT-25 -40oC to +85oC
AME8550CEEVB440Z AYMww 4.4V SOT-25 -40oC to +85oC
AME8550CEEVB440Y AYMww 4.4V SOT-25 -40oC to +85oC
AME8550AEEVC460 AYNww 4.6V SOT-25 -40oC to +85oC
AME8550AEEVC460L AYNww 4.6V SOT-25 -40oC to + 85oC
AME8550AEEVC460Z AYNww 4.6V SOT-25 -40oC to + 85oC
AME8550AEEVC460Y AYNww 4.6V SOT-25 -40oC to + 85oC
AME8550BEEVC460 AYOww 4.6V SOT-25 -40oC to +85oC
AME8550BEEVC460L AYOww 4.6V SOT-25 -40oC to +85oC
AME8550BEEVC460Z AYOww 4.6V SOT-25 -40oC to +85oC
AME8550BEEVC460Y AYOww 4.6V SOT-25 -40oC to +85oC
AME, Inc.
11
AME8550 V oltage Detector
n Absolute Maximum Ratings
Caution: Stress above the listed absolute rating may cause permanent damage to the device
Symbol Maximum Unit
VDD 7V
IOUT 50 mA
CMOS Vss -0.3 to VDD +0.3
Nc h open drai n V ss -0. 3 t o 7
SOT-23 150
SOT-25 150
SOT-89 500
SC-70 100
Topr -40 to +85
TSTG - 40 t o +125
V
Parameter
Out put Vol t age
Input V ol t age
VOUT
Out put Current
oC
Operat ing A m bi ent Tem perat ure Range
S t orage Tem perat ure Range
P o we r Di ssi pa tio n mW
AME, Inc.
12
V oltage Detector
AME8550
Parameter Symbol Min Typ Max Units
Detect Voltage VDF VDF
x0.98 VDF VDF
x1.02 V
Hy s teresi s Range V HYS / VDF 28%
1. 5 < VDF < 2.0 0.9 2. 7
2.0 <= VDF < 3.0 1. 0 3.0
3.0 <= VDF < 4.0 1. 1 3.2
4.0 <= VDF < = 5. 0 1. 2 3. 6
5. 0 < VDF < = 6. 0 2 4. 0
Operat i ng V oltage V DD 1.2 6.5 V
1.0 2.2
3.0 7.7
5.0 10.1
6.0 11.5
7.0 13.0
Temperat ure Charac teri st ics ∆VDF
∆Topr.VDF –100 ppm/oC
P ropagat ion Ti m e
(VD R -->VOUT invers ion) tDLY 0.2 ms
Nc h VDS=0.5V
ISS
VDF(T)= 1. 6V to 6.0V
VDD=VDF+0.5V
Te st Conditi on
Output Current IOUT
VDD=1.0V
S u ppl y Current
-2.0
mA
µA
-40oC<= Topr<= 85oC
VDD=2.0V
VDD=3.0V
VDD=4.0V
VDD=5.0V
Pch VDS=2.1V
VDD=7V
(with CMOS output) -10.0
n Electrical Specifications
TA = 25OC, VDF(T)=1.6 to 6.0V + 2%
Note:
VDF(T) : Established Detect V oltage V alue
Release Voltage : VDR = VDF + VHYS
AME, Inc.
13
AME8550 V oltage Detector
1. When input voltage (VDD) rises above detect voltage
(VDF), output voltage (VOUT) will be equal to VDD.
( A condition of high impedance exists with Nch open
drain output configurations. )
2. When input voltage (VDD) falls below detect voltage
(VDF), output voltage (VOUT) will be equal to the ground
voltage (VSS) level.
3. When input voltage (VDD) falls to a level below that of
the minimum operating voltage (VMIN), output will become
unstable. In this condition, VDD will equal the pulled-up
output ( should output be pulled-up.)
4. When input voltage (VDD) rises above the ground volt-
age (VSS) level, output will be unstable at levels below the
minimum operating voltage (VMIN). Between the VMIN and
detect release voltage (VDR) levels, theground voltage (VSS)
level will be maintained.
5. When input voltage (VDD) rises above detect release
voltage (VDR), output voltage (VOUT) will be equal to VDD
after TD delay time.
Q = V x C = I x TD
T= V=VREF
For Example, TD=
( A condition of high impedance exists with Nch open
drain output configurations. )
6. The difference between VDR and VDF represents the
hysteresis range.
n Functional Description
(CMOS output without delay)
1. When input voltage (VDD) rises above detect voltage
(VDF), output voltage (VOUT) will be equal to VDD.
( A condition of high impedance exists with Nch open
drain output configurations. )
2. When input voltage (VDD) falls below detect voltage
(VDF), output voltage (VOUT) will be equal to the ground
voltage (VSS) level.
3. When input voltage (VDD) falls to a level below that of
the minimum operating voltage (VMIN), output will become
unstable. In this condition, VDD will equal the pulled-up
output ( should output be pulled-up.)
4. When input voltage (VDD) rises above the ground volt-
age (VSS) level, output will be unstable at levels below the
minimum operating voltage (VMIN). Between the VMIN and
detect release voltage (VDR) levels, theground voltage (VSS)
level will be maintained.
5. When input voltage (VDD) rises above detect release
voltage (VDR), output voltage (VOUT) will be equal to VDD.
( A condition of high impedance exists with Nch open
drain output configurations. )
6. The difference between VDR and VDF represents the
hysteresis range.
n Timing Chart
n Functional Description
(CMOS output with delay)
n Timing Chart
Detect Vol tage (VDF)
Min. Operating Voltage (VMIN)
Output Voltage (VOUT)
Ground Voltage (Vss)
Ground Voltage (Vss)
Detect Release Voltage (VDR)
Input Voltage (VDD)
12 345
6
TD
Detect Vol tage (VDF)
Min. Operating Voltage (VMIN)
Output Voltage (VOUT)
Ground Voltage (Vss)
Ground Voltage (Vss)
Detect Release Voltage (VDR)
Input Voltage (VDD)
12 345
6
VxC
IVREF * 1nF
75nA
AME, Inc.
14
V oltage Detector
AME8550
n Notes on Use
1. When a resistor is connected between the VDD pin and
the input with CMOS output configurations, oscillation
may occur as a result of voltage drops at RIN if load cur-
rent (IOUT) exists. ( refer to 5 - (1) below )
2. When a resistor is connected between the VDD pin and
the input with CMOS output configurations, irrespective
of Nch output configurations, oscillation may occur as a
result of through current at the time of voltage release
even if load current (IOUT) does not exist.( refer to 5 - (1)(2)
below )
3. With a resistor connected between the VDDpin and the
input, detect and release voltage will rise as a result of
the IC’s supply current flowing through the V DD pin.
4. In order to stabilise the IC’s operations, please en-
sure that VDD pin’s input frequency’s rise and fall times
are more than several µ sec / V .
5. Oscillation
(1) Output current oscillation with the CMOS output
configuration
When the voltage applied at IN rises, release op-
erations commence and the detector’s output volt-
age increases. Load current (IOUT) will flow at RL.
Because a voltage drop ( RIN x IOUT) is produced at
the RIN resistor , located between the input (IN) and
the VDD pin, the load current will flow via the IC’s
VDD pin. The voltage drop will also lead to a fall in
the voltage level at the VDD pin. When the VDD pin
voltage level falls below the detect voltage level,
detect operations will commence. Following detect
operations, load current flow will cease and since
voltage drop at RIN will disappear , the voltage level
at the VDD pin will rise and release operations will
begin over again.
Oscillation may occur with this “ release - de-
tect - release “ repetition.
Further, this condition will also appear via means
of a similar mechanism during detect operations.
(2) Oscillation as a result of through current
Since the AME8550 series are CMOS ICS,
through current will flow when the IC’s internal cir-
cuit switching operates(during release and detect
operations ).Consequently, oscillation is liable to
occur as a result of drops in voltage at the through
current’s resistor (RIN) during release voltage op-
erations. ( refer to diagram 2 )
Since hysteresis exists during detect operations,
oscillation is unlikely to occur.
Diagram1
Diagram2
VSS
VOUT
VDD
IOUT
RIN
RINxIOUT
voltage drop
AME8550
Input
VSS
VOUT
VDD
RIN
RINxISS*
voltage drop
AME8550
Iss*
(includes through
current)
Input
AME, Inc.
15
AME8550 V oltage Detector
AME8550-1.9V
AME8550-2.7V
0
20
40
60
80
100
120
140
160
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
VDS (V)
NMOS Sinking Curr ent (uA)
VDD=0.7V
VDD=0.8V
0
50
100
150
200
250
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
VDS (V)
NMOS Sinking Current (uA)
0
2
4
6
8
10
12
14
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75
VDS (V)
NMOS Sinking Current (mA)
AME8550-1.9V
AME8550AEETA270
VIN=1.0V
VIN=1.5V
VIN=2.0V
VIN=2.5V
0
5
10
15
20
25
30
35
40
0.00 0.50 1.00 1.50 2.00 2.50 3.00
VDS (V)
NMOS Sinking Current (mA)
AME8550-4.6V
VDD=0.7V
VDD=0.8V
0
20
40
60
80
100
120
140
160
180
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
VDS (V)
NMOS Sinking Current (uA)
AME8550-4.6V
VIN=1.5V
VIN=2.0V
VIN=2.5V
VIN=3.0V
VIN=3.5V
VIN=4.0V
0
5
10
15
20
25
30
35
40
45
50
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
VDS (V)
NMOS Sinking Current (mA)
AME, Inc.
16
V oltage Detector
AME8550
AME8550AEETA270
VDS=0.5V
VDS=1.0V
VDS=1.5V
VDS=2.1V
0
2
4
6
8
10
12
14
16
0.0
0.5
1.0
1.5
2.0
2.5
3.0 3.5
4.0
4.5
5.0
5.5
6.0
Input Voltage (V)
PMOS Sourcing Current (mA)
AME8550-4.6V AME8550-4.6V
0
1
2
3
4
5
6
7
8
9
10
012345
Input Voltage (V)
NMOS Sinking Cur r ent (mA)
VDS=0.5V
VDS=1.0V
VDS=1.5V
VDS=2.1V
0
2
4
6
8
10
12
14
16
0.00.40.81.21.62.02.42.83.23.64.04.44.85.25.66.0
Input Voltage (V)
PMOS Sourcing Cu rrent (mA)
VDS=0.5V
VDS=1.0V
VDS=1.5V
VDS=2.1V
0
2
4
6
8
10
12
14
16
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
Input Voltage (V)
PMOS Sourcing Current (mA)
AME8550-2.7V
0
1
2
3
4
5
6
7
8
9
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Input Voltage (V)
NMOS Sinking Current (mA)
0
1
2
3
4
5
6
7
8
9
0.0 0.5 1.0 1.5 2.0
Input Voltage (V)
NMOS Sinking Current (mA)
AME8550-1.9V
AME8550-1.9V
AME, Inc.
17
AME8550 V oltage Detector
Supply Current vs. Input Voltage (2.7V) Output Voltage vs. Input Voltage (2.2V)
Input voltage (V)
Supply Current (uA)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
012345 0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0 0.5 1 1.5 2 2.5 3
Input Voltage (V)
Output Voltage (V)
VIN up
VIN down
Output Voltage vs. Input Voltage (2.7V)
Input Voltage (V)
Output Voltage (V)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0 0.5 1 1.5 2 2.5 3
VIN up
VIN down
AME, Inc.
18
V oltage Detector
AME8550
n Package Dimension
SOT-23
MIN MAX MIN MAX
A1.00 1.40 0.0394 0.0551
A10.00 0.15 0.0000 0.0059
b0.35 0.50 0.0138 0.0197
C0.09 0.25 0.0035 0.0098
D2.70 3.10 0.1063 0.1220
E1.40 1.80 0.0551 0.0709
e
H2.40 3.00 0.09449 0.11811
L
θ
θθ
θ10o10o0o10o
SYMBOLS MILLIMETERS INCHES
1.90 BS C 0.0748 BS C
0.35BSC 0.0138BSC
b
£c1
C
D
H
E
e
L
A
A1
Top View Side View
Front View
TSOT-23
MIN MAX MIN MAX
A+A10.80 1.30 0.0315 0.0512
b0.35 0.50 0.0138 0.0197
C0.08 0.25 0.0031 0.0098
D2.70 3.10 0.1063 0.1220
E1.20 1.80 0.0472 0.0709
e
H2.40 3.00 0.09449 0.11811
L
θ
θθ
θ10o10o0o10o
1.90 B S C 0.0748 BSC
0.35BSC 0.0138BSC
SYMBOLS MILLIMETERS INCHES
b
£c1
C
D
H
E
e
L
A
A1
Top View Side View
Front View
AME, Inc.
19
AME8550 V oltage Detector
SOT-25
n Package Dimension
L
Top View Side View
Front View
£c1
D
S1
e
E
H
A1
b
A
MIN MAX MIN MAX
A
A10.00 0.15 0.0000 0.0059
b0.30 0.55 0.0118 0.0217
D2.70 3.10 0.1063 0.1220
E1.40 1.80 0.0551 0.0709
e
H2.60 3.00 0.10236 0.11811
L
θ
θθ
θ10o10o0o10o
S1
0.37BSC 0.0146BSC
0.95BSC 0.0374BSC
1.90 BSC 0.07480 B S C
SYMBOLS MILLIMETERS INCHES
1.20REF 0.0472REF
MIN MAX MIN MAX
A+A10.90 1.25 0.0354 0.0492
b0.30 0.50 0.0118 0.0197
c0.09 0.25 0.0035 0.0098
D2.70 3.10 0.1063 0.1220
E1.40 1.80 0.0551 0.0709
e
H2.40 3.00 0.09449 0.11811
L
θ
θθ
θ10o10o0o10o
S1
1.90 BS C 0.07480 B S C
SYMBOLS MILLIMETERS INCHES
0.35BSC 0.0138BSC
0.95BSC 0.0374BSC
L
Top View Side View
Front View
£c1
D
S1
e
E
H
A1
b
A
TSOT-25
AME, Inc.
20
V oltage Detector
AME8550
n Package Dimension
SOT-89
MIN MAX MIN MAX
A1.39 1.60 0.05472 0.06299
A1
C0.35 0.44 0.01378 0.01732
D4.39 4.60 0.17283 0.1811
D11.35 1.83 0.05315 0.07205
E2.28 3.60 0.08976 0.14173
e
H
S1
3.00REF
0.70REF
1.50REF
0.1181REF
0.0276REF
0.0590REF
0.8REF 0.0315REF
SYMBOLS MILLIMETERS INCHES
A
H
A1
Top View Side View
Fron t View
D
D1
E
e
C
POLISH
POLISH
MATTE FINISH
S1
Life Support Policy:
These products of AME, Inc. are not authorized for use as critical components in life-support
devices or systems, without the express written approval of the president
of AME, Inc.
AME, Inc. reserves the right to make changes in the circuitry and specifications of its devices and
advises its customers to obtain the latest version of relevant information.
AME, Inc. , July 2004
Document: 2051-DS8550-F
Corporate Headquarter U.S.A (Subsidiary)
AME, Inc. Analog Microelectronics, Inc.
2F, 302 Rui-Guang Road, Nei-Hu District 3100 De La Cruz Blvd., Suite 201
Taipei 114, Taiwan, R.O.C. Santa Clara, CA. 95054-2046
Tel: 886 2 2627-8687 Tel : (408) 988-2388
Fax: 886 2 2659-2989 Fax: (408) 988-2489
www.ame.com.tw
E-Mail: sales@ame.com.tw
