TC74HC40102,40103AP/AF

2007-10-01

6

Preset Operation and Reset Operation

When Clear ( CLR ) input is set to the “L” level, the readout is set to the maximum count independently of

other inputs. When Asynchronous Preset Enable ( APE ) input is set to the “L” level, readouts given on J0 to J7

can be preset asynchronously to counter independently of inputs other than CLR input. When Synchronous

Preset Enable ( SPE ) is set to the “L” level, the readouts given on J0 to J7 can be preset to counter

synchronously with rise of clock.

As to these operation modes, refer to the truth table.

Absolute Maximum Ratings (Note 1)

Characteristics

Symbol

Rating

Unit

Supply voltage range

V

DC input voltage

V

DC output voltage

V

Input diode current

mA

Output diode current

mA

DC output current

mA

mA

Power dissipation

500 (DIP) (Note 2)/180 (SOP)

mW

Storage temperature

°C

Note 1: Exceeding any of the absolute maximum ratings, even briefly, lead to deterioration in IC performance or

even destruction.

Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the

significant change in temperature, etc.) may cause this product to decrease in the reliability significantly

even if the operating conditions (i.e. operating temperature/current/voltage, etc.) are within the absolute

maximum ratings and the operating ranges.

Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook

(“Handling Precautions”/“Derating Concept and Methods”) and individual reliability data (i.e. reliability test

report and estimated failure rate, etc).

Note 2: 500 mW in the range of Ta

= −40 to 65°C. From Ta = 65 to 85°C a derating factor of −10 mW/°C shall be

applied until 300 mW.

Operating Ranges (Note)

Characteristics

Symbol

Rating

Unit

Supply voltage

2 to 6

V

Input voltage

V

Output voltage

V

Operating temperature

°C

Input rise and fall time

ns

Note:

The operating ranges must be maintained to ensure the normal operation of the device.

Unused inputs must be tied to either VCC or GND.