7

AC Timing Characteristics over Temperature Range (-40 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 Chip Enable Edge

20

20

ns

4

Chip Enable Setup Time to Rising Clock Edge

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

410

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.