Am79R251

15

Thermal Resistance

The junction to air thermal resistance of the Am79R251 in a 32-pin, PLCC package is 45°C/W. The

typical junction to case thermal resistance is 14°C/W. Measured under free air convection conditions

and without external heatsinking.

Absolute Maximum Ratings

Operating Ranges

Operating ranges define those limits between which device functionality is guaranteed. Functionality

of the device from 0°C to 70°C is guaranteed by production testing. Performance from –40°C to

85°C is guaranteed by characterization and periodic sampling of production units.

Environmental Ranges

Storage Temperature

–55 to +150° C

Ambient temperature, under bias

–40 to +85° C

Humidity

TBD

VCC with respect to GND

–0.4 to +7 V

+0.4 to –85 V

VBP with respect to GND

–0.4 to +85 V

VBP with respect to VBH

150 V

BGND with respect to GND

–3 to +3V

Voltage on R1 relay outputs

+7 V

AD or BD to BGND:

Continuous

VBH – 1 to VBP + 1

10 ms (F = 0.1 Hz)

VBH – 5 to VBP + 5

1 µs (F = 0.1 Hz)

VBH – 10 to VBP + 10

250 ns (F = 0.1 Hz)

VBH – 15 to VBP + 15

Current into SA or SB: 10 µs rise to Ipeak; 1000 µs fall to 0.5 Ipeak;

2000 µs fall to I =0

Ipeak = ±5 mA

Current into SA or SB: 2 µs rise to Ipeak; 10 µs fall to 0.5 Ipeak; 20 µs fall to I = 0

Ipeak = ±12.5 mA

SA SB continuous

5 mA

Current through AD or BD

± 150 mA

P1, P2, P3, LD to GND

–0.4 to VCC + 0.4 V

ESD Immunity (Human Body Model)

1500 V min

1.67 W

1.33 W

Note 1: Thermal limiting circuitry on chip will shut down the circuit at a junction temperature of about 165°C.

The device should never see this temperature. Operation above 145° C junction temperature may

degrade device reliability.

Note 2: Rise time of VBH (dv/dt) must be limited to less than 27 v/

µs.

Ambient Temperature

0 to 70°C Commercial

–40 to +85 °C extended temperature

Ambient Relative Humidity

15 to 85%