SM5816AF

SEIKO NPC CORPORATION —7

AC Electrical Characteristics

If DSBCKF, DSBCKB, F8WCK, F2LRCK clocks are input externally, by frequency division the clock input

on MCK has the following relationships.

(DSBCKF, DSBCKB) cycle = 8

× MCK cycle (64fs)

(F8WCK) cycle

= 64

× MCK cycle (8fs)

(F2LRCK) cycle

= 256

× MCK cycle (2fs)

System clock

I

MCK pin

External system clock

I

EXIMCK pin

Parameter

Symbol

Rating

Unit

min

typ

max

"H"-level pulsewidth

13

–

–

ns

"L"-level pulsewidth

13

–

–

ns

Pulse cycle

40

44.29 (1/512fs)

–

ns

Rise/fall time

–

–

10

ns

Parameter

Symbol

Rating

Unit

min

typ

max

"H"-level pulsewidth

13

–

–

ns

"L"-level pulsewidth

13

–

–

ns

Pulse cycle

40

–

–

ns

Rise/fall time

–

–

10

ns

MCK

EXIMCK