NOT RECOMMENDED FOR NEW DESIGN
USE AH3774
AH1751
HALL EFFECT LATCH
Description
AH1751 is a single-digital-output Hall-effect sensor for high
temperature operation. The device includes an on-chip Hall voltage
generator for magnetic sensing, an amplifier to amplify Hall voltage,
and a comparator to provide switching hysteresis for noise rejection,
and an open-collector output pre-driver. An internal band-gap
regulator is used to provide temperature compensated supply voltage
for internal circuits and allows a wide operating supply range.
While the magnetic flux density (B) is larger than threshold Bop, the
OUT pin turns on (low). If B removed toward Brp, the OUT pin is
latched “on” state prior to B < Brp. When B < Brp, the OUT pin go into
“off ” state.
Pin Assignments
( Top View )
3. OUT
2. GND
1. V
CC
SIP3
( Top View )
3. Output
GND 2.
1 . V
CC
Features
Bipolar Hall Effect Latch Sensor
3.5V to 20V DC Operation Voltage
Open Collector Pre-Driver
50mA Output Sink Current
Chip Power Reverse-Connection Protection
Operating Temperature: -40°C to 125°C
SIP3, SC59 and SC59R (Commonly known as SOT23 in Asia):
Available in “Green” Molding Compound (No Br, Sb)
Totally Lead-free & Fully RoHS Compliant (Note 1 & 2
Halogen and Antimony Free. “Green” Device (Note 3)
SC59
( Top View )
3. V
CC
GND 2.
1 . Output
SC59R
Applications
Rotor Position Sensing
Current Switch
Encoder
RPM Detection
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3).compliant.
2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and
Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
AH1751
Document number: DS31436 Rev. 4 - 3
1 of 8
www.diodes.com
March 2018
© Diodes Incorporated
NOT RECOMMENDED FOR NEW DESIGN
USE AH3774
AH1751
Pin Descriptions
Pin Name
V
CC
GND
OUT
Input Power
Ground
Output Stage
Description
Functional Block Diagram
V
CC
1
REG.
3
AMP
OUT
2
GND
Absolute Maximum Ratings
(@T
A
= +25°C, unless otherwise specified.)
Symbol
V
CC
V
OUT
(off)
I
O
(sink)
T
ST
T
J(MAX)
P
D
Supply Voltage
Output “OFF ” Voltage
Output “ON” Current
Storage Temperature Range
Maximum Junction Temperature
Power Dissipation
SIP3
SC59 and SC59R
Parameter
Rating
20
20
100
-65 to +150
+150
550
230
Unit
V
V
mA
C
C
mW
mW
AH1751
Document number: DS31436 Rev. 4 - 3
2 of 8
www.diodes.com
March 2018
© Diodes Incorporated
NOT RECOMMENDED FOR NEW DESIGN
USE AH3774
AH1751
Recommended Operating Conditions
Symbol
V
CC
T
A
Note:
Parameter
Supply Voltage
Operating Temperature Range
Conditions
Operating (Note 4)
Operating
Min
3.5
-40
Max
20
+125
Unit
V
C
4. Operating, the output is switching as magnetic field change (S>300G, N<-300G).
Electrical Characteristics
Symbol
V
OUT
(
SAT
)
I
CC
(@T
A
= +25°C, unless otherwise specified.)
Conditions
V
CC
= 12V, OUT ”ON”
I
O
= 50mA
V
CC
= 12V, OUT ”OFF”
Min
-
-
Typ
200
3.5
Max
300
6
Unit
mV
mA
Parameter
Output Saturation Voltage
Supply Current
Magnetic Characteristics
(@T
A
= +25°C, V
CC
= 4V to 20V, unless otherwise specified. Note 5)
A grade
Symbol
Bops (south pole to brand side)
Brps (south pole to brand side)
Bhy (
Bopx
Brpx
)
Notes:
(1mT = 10 Gauss)
Parameter
Operation Point
Release Point
Hysteresis
Min
5
-70
-
Typ.
-
-
75
Max
70
-5
-
Unit
Gauss
Gauss
Gauss
5. Magnetic characteristics are for design information, which will vary with supply voltage, operating temperature and after soldering.
Operating Characteristics
V
OUT
(Output Voltage)
V
cc
High
S
S
Marking
side
V
d
B
hy
Low
Marking
side
N
(SC59 and SC59R)
N
(SIP3)
V
SAT
B
rp
0
B
op
(Magnetic Flux Density)
AH1751
Document number: DS31436 Rev. 4 - 3
3 of 8
www.diodes.com
March 2018
© Diodes Incorporated
NOT RECOMMENDED FOR NEW DESIGN
USE AH3774
AH1751
Performance Characteristics
(1)
SIP3
T
A
(C)
P
D
(mW)
T
A
(C)
P
D
(mW)
25
550
105
198
50
440
110
176
60
396
115
154
70
352
120
132
80
308
125
110
85
286
130
88
90
264
135
66
95
242
140
44
100
220
150
0
P
D
(mW )
600
500
400
300
200
100
0
0
25
Power Dissipation Curve
50
75
100
125
150
T
A
(°C)
(2)
SC59 and SC59R (Commonly known as SOT23 in Asia)
T
A
(C)
P
D
(mW)
25
230
50
184
60
166
70
147
80
129
90
110
100
92
110
74
120
55
125
46
130
37
140
18
150
0
P
D
(mW)
300
Power Dissipation Curve
200
100
0
0
-40
25
50
75
100
125
150
T
A
(°C)
AH1751
Document number: DS31436 Rev. 4 - 3
4 of 8
www.diodes.com
March 2018
© Diodes Incorporated
NOT RECOMMENDED FOR NEW DESIGN
USE AH3774
AH1751
Ordering Information
AH1751 -X X - X
Package
P : SIP-3
W : SC59
R : SC59
Status
(Note 9)
NRND
NRND
NRND
NRND
Package
Code
P
P
W
W
Packaging
(Note 6)
SIP-3
SIP-3
SC59
SC59R
Green
G : Green
Packing
A : Ammo Box (Note 7)
B : Bulk (Note 8)
7 : Tape & Reel
7” Tape and Reel
Quantity
NA
NA
3000/Tape & Reel
3000/Tape & Reel
Part Number
Suffix
NA
NA
-7
-7
Ammo Box
Part
Quantity
Number
Suffix
4000/Box
NA
NA
NA
A
NA
NA
NA
Part Number
AH1751-PG-A-A
AH1751-PG-B-A
AH1751-WG-7-A
AH1751-RG-7-A
Notes:
Bulk
Part
Quantity
Number
Suffix
NA
1000
NA
NA
NA
-B
NA
NA
6. Pad layout as shown on Diodes Inc. suggested pad layout document, which can be found on our website at
http://www.diodes.com/package-outlines.html.
7. Ammo Box is for SIP3 Spread Lead.
8 . Bulk is for SIP-3 Straight Lead.
9: NRND = Not Recommended for New Design
Marking Information
(1)
Package Type: SIP-3 (Ammo Pack), SIP-3 (Bulk Pack)
( Top View )
Part Number
1751
Y WW X
Y : Year : 0~9
WW : Week : 01~52, "52" represents
52 and 53 week
X : Internal Code : A~Z : Green
(2)
Package Type: SC59 and SC59R (Commonly known as SOT23 in Asia)
( Top View )
XX Y W X
XX : Identification code
Y : Year 0~9
W : Week : A~Z : 1~26 week;
a~z : 27~52 week; z represents
52 and 53 week
X : A~Z : Green
Part Number
AH1751
AH1751
Package
SC59
SC59R
Identification Code
RK
SK
AH1751
Document number: DS31436 Rev. 4 - 3
5 of 8
www.diodes.com
March 2018
© Diodes Incorporated
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