7

AC Timing Characteristics Over Temperature Range (-40°C to +85°C)

Timing

Diagram Ref.

Number

Description

Symbol

Min.

Max.

Min.

Max.

Units

1 

Register Select Setup Time to Chip Enable 

10 

 

10 

 

ns

2 

Register Select Hold Time to Chip Enable 

10 

 

10 

 

ns

3 

Rising Clock Edge to Falling 

20 

 

20 

 

ns 

 

Chip Enable Edge

4 

35 

 

55 

 

ns

5 

Chip Enable Hold Time to Rising Clock Edge 

20 

 

20 

 

ns

6 

Data Setup Time to Rising Clock Edge 

10 

 

10 

 

ns

7 

Data Hold Time after Rising Clock Edge 

10 

 

10 

 

ns

8 

10 

40 

10 

65 

ns

9 

 

18 

 

30 

ns 

 

10 

 

25 

 

45 

ns

11 

Clock High Time 

80 

 

100 

 

ns

12 

Clock Low Time 

80 

 

100 

 

ns

 

Reset Low Time 

50 

 

50 

 

ns

 

Clock Frequency  

 

5 

 

4 

MHz

 

Internal Display Oscillator Frequency 

80 

210 

80 

210 

KHz

 

Internal Refresh Frequency 

150 

410 

150 

400 

Hz

 

External Display Oscillator  Frequency 

 

 

 

 

  Prescaler = 1 

 

51.2 

1000 

51.2 

1000 

KHz

 

  Prescaler = 8 

 

410 

8000 

410 

8000 

KHz

Notes:

1. Timing specifications increase 0.3 ns per pf of capacitive loading above 15 pF.

2. This parameter is valid for Simultaneous Mode data entry of the Control Register.