Tde Instruments 7400AS Data Sheet

Draft

Supply

2.6 - 3.4VDC

Current consumption

<10µA, 5µA typical.

Reset Button

The 7400 has a Reset Button.
The 7401 does not.

Display

8 digit black LCD, 8mm characters

Count Range

99999999 - rollover to 0

Operating temperature

-10°C to +60°C

Storage temperature

-20°C to +60°C

Altitude

Up to 2000m

Relative Humidity

80% max up to 31°C, decreasing to 50%
max at 40°C

Specification

–

1 D +

Connections

Note:
This product is ideally suited to battery powered applications. Should the product be used
in a circuit where an external power source is used, then the complete system will require
separate approval to meet the CE standards.

–

2.6 - 3.4V

<= +18V

–

High Speed Count
(TTL/CMOS)

Low Speed Count
(Contact Closure/

Open Collector)

External Reset
(Contact Closure/
Open Collector)

Direction
(TTL/CMOS)

This product can be powered from a higher
voltage DC supply using the external voltage
control circuit shown on page 7.

down

internal
resistor

<=5KHz

<=18V

0.7V

=>100 S

<=20Hz

<=18V

0.7V

=>25mS

<=18V

0.7V

<=18V

0.7V

=>15mS

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