5-8

TELCOM SEMICONDUCTOR, INC.

MICROMASTER™ – SYSTEM SUPERVISOR

WITH POWER SUPPLY MONITOR, WATCHDOG

AND BATTERY BACKUP

*This is a stress rating only and functional operation of the device at these

or any other conditions above those indicated in the operational sections of

the specifications is not implied. Exposure to Absolute Maximum Rating

Conditions for extended periods may affect device reliability.

ABSOLUTE MAXIMUM RATINGS*

Voltage (Any Pin) with Respect to

Operating Temperature Range ............... – 40

°C to +85°C

Storage Temperature Range ................ – 65

°C to +150°C

Lead Temperature (Soldering, 10 sec) ................. +300

°C

TC70/71

ELECTRICAL CHARACTERISTICS:

Symbol

Parameter

Test Conditions

Min

Typ

Max

Unit

Supply Voltage

Note 1

4.5

5.0

5.5

V

Input HIGH Level

CEI, WDD (Note 1)

2.5

—

—

V

Input HIGH Level

RS (Note 1)

2.2

—

—

V

Input LOW Level

CEI, WDD, RS (Note 1)

—

—

0.8

V

ELECTRICAL CHARACTERISTICS:

Symbol

Parameter

Test Conditions

Min

Typ

Max

Unit

Operating Current

Notes 2, 3

—

5

6.5

mA

Operating Current in

—

0.01

0.20

µA

Battery Backup Mode

Input Leakage

CEI

—

4

7

µA

Input Leakage

CEI

—

1

—

µA

Input Leakage

RS

—

1

—

µA

Battery Standby Current

– 1.0

—

0.02

µA

Battery Standby Current

– 0.1

—

0.02

µA

ELECTRICAL CHARACTERISTICS:

Symbol

Parameter

Test Conditions

Min

Typ

Max

Unit

Output Current 0.4V

2

5

—

mA

(RS, TDO, CEO, PF Pins)

Output Current 2.4V

2

3

—

mA

(TDO, CEO, PF Pins)

WDD Input Current

WDD = GND

– 120

—

—

µA

——

25

RS Strobe (HIGH) Level

Figure 3 (Note 1)

—

—

V

RS Strobe (LOW) Level

Figure 3 (Note 1)

2.2

—

V

(Note 1) 0

4.25

—

4.49

– 40

4.20

4.49

ELECTRICAL CHARACTERISTICS:

Symbol

Parameter

Test Conditions

Min

Typ

Max

Unit

—

V

—

—

V