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

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 Frequency

54

MHz

Internal Display Oscillator

80

210

80

210

KHz

Internal Refresh Frequency

150

410

150

400

Hz

External Display Oscillator

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.