A1242 ALLEGRO [Allegro MicroSystems], A1242 Datasheet - Page 4

• Manufacturer Part Number: A1242
• Description: Two-Wire Chopper-Stabilized Hall Effect Latch
• Manufacturer: ALLEGRO [Allegro MicroSystems]

THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information
A1242-DS
Package Thermal Resistance
*Additional information available on the Allegro Web site.
Characteristic
Two-Wire Chopper-Stabilized Hall Effect Latch
1900
1800
1700
1600
1500
1400
1300
1200
1100
1000
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
900
800
700
600
500
400
300
200
100
9
8
7
6
5
4
3
2
0
20
Power Dissipation versus Ambient Temperature
20
Low-K PCB, Package LH
(R
Minimum-K PCB, Package UA
(R
Minimum-K PCB, Package LH
(R
Symbol
Min-K PCB, Package LH
(R
R
JA
JA
JA
JA
θJA
40
= 165 °C/W)
= 228 °C/W)
= 110 °C/W)
40
= 228 °C/W)
60
60
T
Package LH, minimum-K PCB (single layer, single-sided with
copper limited to solder pads)
Package LH, low-K PCB (single layer, double-sided with
0.926 in
Package UA, minimum-K PCB (single layer, single-sided with
copper limited to solder pads)
J(max)
Power Derating Curve
Low-K PCB, Package LH
(R
Temperature (°C)
80
Temperature (°C)
A1242
80
JA
Min-K PCB, Package UA
(R
= 165°C; I
2
= 110 °C/W)
JA
copper area)
100
= 165 °C/W)
100
CC
120
120
= I
Test Conditions*
CC(max)
140
140
160
160
180
180
V
V
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
CC(max)
CC(min)
Value Units
228
165
110
ºC/W
ºC/W
ºC/W
4