3195

PROTECTED, HIGH-TEMP.,

ACTIVE PULL-DOWN

HALL-EFFECT LATCH

3195

PROTECTED, HIGH-TEMPERATURE,

HALL-EFFECT LATCH WITH ACTIVE PULL-DOWN

Always order by complete part number, e.g., A3195LU .

These Hall-effect latches are capable of sensing magnetic fields

while using an unprotected power supply. The A3195– can provide

position and speed information by providing a digital output for mag-

netic fields that exceed their predefined switch points. These devices

operate down to zero speed and have switch points that are designed

to be extremely stable over a wide operating temperature and voltage

range. The latching characteristics make them ideal for use in pulse

counting applications when used with a multi-pole ring magnet.

A 25 mA high-side driver combined with an active pull-down is espe-

cially useful for driving capacitive loads. Output short-circuit protection

allows for an increased wiring harness fault tolerance. The tempera-

ture compensated switch points, the wide operating voltage range, and

the integrated protection make these devices ideal for use in automo-

tive applications such as transmission speed sensors and integrated

wheel bearing speed sensors.

Each monolithic device contains an integrated Hall-effect trans-

ducer, a temperature-compensated comparator, a voltage regulator,

and a buffered high-side driver with an active pull-down. Supply

protection is made possible by the integration of overvoltage shutdown

circuitry that monitors supply fault conditions. Output protection

circuitry includes source and sink current current limiting for short

circuits to supply or ground.

The A3195E– is rated for operation over a temperature range of

-40

°C to +85°C; the A3195L– is rated for operation over an extended

temperature range of -40

°C to +150°C. They are supplied in a three-

lead SIP (suffix –U) or a surface-mount SOT-89 (suffix –LT).

FEATURES

s Internal Protection For Automotive (ISO/DIN) Transients

s Operation From Unregulated Supply

s Reverse Battery Protection

s Undervoltage Lockout

s Supply Noise-Suppression Circuitry

s Output Short-Circuit Protection

s Output Zener Clamp

s Thermal Protection

s Symmetrical Latching Switch Points

s Operable with Multipole Ring Magnets

Dwg. PH-013

1

3

2

LATCH

ABSOLUTE MAXIMUM RATINGS

(continuous) ................................... 26 V

Reverse Battery Voltage,

(continuous) ................................. -30 V

Magnetic Flux Density, B ........... Unlimited

Continuous Output Current,

Package Power Dissipation,

Suffix “E–” .................... -40

Suffix “L–” .................. -40

*Fault condition, internal overvoltage shutdown

above 28 V.

Pinning is shown viewed from branded side.