ABSOLUTE MAXIMUM RATINGS*

Parameter

Value

Unit

DC Supply Voltage

6.5

V

Operating Temperature

– 20 to +60

°C

Storage Temperature

– 55 to + 125

°C

Maximum Power Dissipation (25

°C)

500

mW

Maximum Voltage on any Pin

(V

V

* All speci ficati ons are for 2.5 V olt operation and f ull oper ating temperature r ange unless otherwi se stat ed.

DC CHARACTERISTICS

Symbol

Parameter

Min.

Typ.

Max.

Unit

Notes

V+

TONE

DC Operating Voltage

(tone mode)

2.5

6.0

V

Memory Retention Voltage

1.5

V

1. 6

Standby Current

0.4

1.0

µA1

Memory Retention Current

0.15

0.75

µA5. 6

Mute Output Operating Voltage

1.8

V

7

Operating Current (tone)

300

600

µA2

Operating Current (pulse)

150

250

µA2

Operating Current On-hook Program Mode

Key Operated

No-key Operated

200

1

µA

µA

Mute Output (2.5 Volts)

Sink Current (4.0 Volts)

1.0

3.0

mA

mA

3

Pulse Output Sink Current

1.0

2.0

mA

3

Pacifier Tone Sink/Source

250

500

µA4

Keypad Pullup Resistance

100

k

Ω

Keypad Pulldown Resistance

500

Ω

Keypad Input Level-low

0

0.3 V

+

V

Keypad Input Level-high

0.7 V

+

V+

V

Operating Voltage (pulse mode)

1.8

6.0

V

Notes : 1. All inputs unloaded. Quiescent mode (oscillator off).

2. All outputs unloaded, single key input.

5. Memory Retention Voltage is the point where memory is guaranteed but circuit operation is not.

both the minimum current or voltage simultaneously.

7. Minimum voltage where activation of mute output with key entry is ensured.

°C unless otherwise specified)

Table 3 : Special Function Delays.

Function

First/Auto

Pulse

Tone

SOFTS WITCH

FIRST

AUTO

0.40

1.10

Each delay shown below represents the time required from after the special function key is depressed until

a new digit can be dialed.

The time is considered ”FIRST” key is all previous inputs have been completed dialed. The time is considered

”AUTO” if in redial, or previous dialing is still in progress.

MK53761

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