A1185LLHLT-T Allegro Microsystems Inc, A1185LLHLT-T Datasheet - Page 13

• Manufacturer Part Number: A1185LLHLT-T
• Description: IC SWITCH HALL EFFECT UNI SOT-23
• Manufacturer: Allegro Microsystems Inc
• Type: Unipolar Switchr

Specifications of A1185LLHLT-T

• Sensing Range: 10G ~ 60G Trip - Programmable, Fixed Release
• Voltage - Supply: 3.5 V ~ 24 V
• Current - Supply: 6.9mA
• Output Type: Digital, Open Collector
• Features: Programmable
• Operating Temperature: -40°C ~ 150°C
• Package / Case: SOT-23W
• Magnetic Type: Unipolar
• Operating Supply Voltage (min): 3.5V
• Operating Supply Voltage (typ): 5/9/12/15/18V
• Operating Supply Voltage (max): 24V
• Mag Sensor Operate Point (g): 60Gs
• Mag Sensor Hysteresis(g): 15Gs
• Package Type: SOT-23W
• Pin Count: 3
• Mounting: Surface Mount
• Operating Temp Range: -40C to 150C
• Operating Temperature Classification: Automotive
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output (max): -
• Lead Free Status / RoHS Status: Compliant, Lead free / RoHS Compliant

A1185
A1186
Enabling Addressing Mode.
keying sequence used to enable the bitfield addressing mode. As
shown in figure 7, this segment consists of one short V
one V
ruptions. This sequence is designed to prevent the device from
being programmed accidentally, such as by noise on the supply
line.
Address Selection.
target bitfield address, is indicated by a series of V
shown in figure 8.
Lock Bit Programming.
is programmed, and all of the corresponding bitfield-level fuses
are blown, the device-level fuse should be blown. To do so, the
lock bit (bitfield address 32) should be encoded as 1 and have
its fuse blown. This is done in the same manner as permanently
setting the other bitfields, as shown in figure 9.
PM
pulse, and one short V
and
After addressing mode is enabled, the
After the desired B
The first segment of code is a
PH
Chopper-Stabilized Unipolar Hall Effect Switches
pulse, with no supply inter-
Ultrasensitive Two-Wire Field-Programmable
OP
calibration value
PM
pulses, as
PH
pulse,
V
V
V
V
V
V
V
V
V
PM
PH
PM
PH
PH
PM
PL
PL
PL
0
0
0
V+
V+
V+
Figure 9. Pulse sequence to encode lock bit
Figure 7. Addressing mode enable pulse sequence
Figure 8. Pulse sequence to select addresses
Falling edge of final B
Enable
Address 1
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
Address 2
OP
Encode Lock Bit
address digit
128 pulses
Address
Address n ( ≤ 127)
t
t
Blow
t
12