CS5451A

8

DS635PP1

SWITCHING CHARACTERISTICS

Notes: 10. Device parameters are specified with a 4. 000MHz clock, OWRS = 1.

11. Specified using 10% and 90% points on wave-form of interest. Output loaded wi th 50pF.

Parameter

Symbol

Min

Typ

Max

Unit

Master Clock Frequency

(Note 10)

XIN

3

4.000

5

MHz

Master Clock Duty Cycle

-

40

-

60

%

Rise Times

Any Digital Input (Note 11)

Any Digital Output

-

-

-

50

1.0

-

µs

ns

Fall Times

Any Digital Input (Note 11)

Any Digital Output

-

-

-

50

1.0

-

µs

ns

Serial Port Timing

Serial Clock Frequency

(Note 10)

OWRS = “0”

OWRS = “1”

SCLK

SCLK

-

-

500

1000

-

-

kHz

kHz

Serial Clock

Pulse Width High (Note 10)

Pulse Width Low (Note 10)

-

-

0.5

0.5

-

-

SCLK

SCLK

SCLK falling to New Data Bit

--

50

ns

FSO Falling to SCLK Rising Delay

(Note 10)

-0.5

-

SCLK

FSO Pulse Width

(Note 10)

-1

-

SCLK

SE Rising to Output Enabled

--

50

ns

SE Falling to Output in Tri-state

--

50

ns

SE

6

t

6

t

SD O

SC L K

t

2

t

1

t

3

FS O

4

t

5

t

MSB(V1)

MSB(V1) - 1

LSB(I3)

Figure 1. Serial Port Timing