Ensuring a Valid

RESET Output Down to

MAX6772/MAX6774/MAX6774B)

bilities decline drastically. High-impedance CMOS-

logic inputs connected to RESET can drift to

undetermined voltages. This presents no problems in

most applications, since most µPs and other circuitry

do not operate with supply voltages below 1V. In those

applications where RESET must be valid down to 0V,

adding a pulldown resistor between RESET and ground

sinks any stray leakage currents, holding RESET low

(Figure 5). The value of the pulldown resistor is not criti-

cal; 100k

Ω is large enough not to load RESET and

small enough to pull RESET to ground. Open-drain

RESET versions are not recommended for applications

Automotive Micropower Linear Regulators

with Supervisor

18

______________________________________________________________________________________

PART

OUTPUT

VOLTAGE (V)

RESET TIMEOUT

PERIOD (ms)

RESET THRESHOLD

(V)

TOP MARK

MAX6765TTLD2+T

5

12.5

4.625

+AQB

MAX6765TTSD2+T

3.3

12.5

2.888

+AQL

MAX6766TTLD2+T

5

12.5

4.625

+ARO

MAX6766TTSD2+T

3.3

12.5

2.888

+ARZ

MAX6767TALD2+T

5

12.5

4.625

+AVI

MAX6767TASD2+T

3.3

12.5

2.888

+AVS

MAX6768TALD2+T

5

12.5

4.625

+AVZ

MAX6768TASD2+T

3.3

12.5

2.888

+AXE

MAX6769TALD2+T

5

12.5

4.625

+AYH

MAX6769TASD2+T

3.3

12.5

2.888

+AYQ

MAX6770TALD2+T

5

12.5

4.625

+AZS

MAX6770TASD2+T

3.3

12.5

2.888

+BAC

MAX6771TALD2+T

5

12.5

4.625

+BEG

MAX6771TASD2+T

3.3

12.5

2.888

+BEQ

MAX6772TALD2+T

5

12.5

4.625

+APY

MAX6772TASD2+T

3.3

12.5

2.888

+BGC

MAX6773TALD2+T

5

12.5

4.625

+BBG

MAX6773TASD2+T

3.3

12.5

2.888

+AQE

MAX6773BTALD2+T

5

12.5

4.625

+BHK

MAX6773BTASD2+T

3.3

12.5

2.888

+BHU

MAX6774TALD2+T

5

12.5

4.625

+BCS

MAX6774TASD2+T

3.3

12.5

2.888

+BDC

MAX6774BTALD2+T

5

12.5

4.625

+BIY

MAX6774BTASD2+T

3.3

12.5

2.888

+BJI

Table 4. Standard Version Part Numbers

MAX6766

MAX6768

MAX6770

MAX6772

MAX6774

MAX6774B

RESET

GND

IN