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COMMERCIALTEMPERATURERANGE

IDT723663/723673 CMOS SyncFIFOTM WITH BUS-MATCHING

4,096 x 36 x 2 and 8,192 x 36 x 2

Figure 18. Timing for Mail2 Register and MBF2 Flag (IDT Standard and FWFT Modes)

NOTE:

1. If Port B is configured for word size, data can be written to the Mail2 Register using B0-B17 (B18-B35 are don't care inputs). In this first case A0-A17 will have valid data (A18-

A35 will be indeterminate). If Port B is configured for byte size, data can be written to the Mail2 Register using B0-B8 (B9-B35 are don't care inputs). In this second case, A0-A8

will have valid data (A9-A35 will be indeterminate).

5610 drw20

CLKB

ENB

B0-B35

MBB

CSB

W/RB

CLKA

MBF2

CSA

MBA

ENA

A0-A35

W/

RA

tENS1

tENH

tDS

tDH

tENS2

tENH

tDIS

tEN

tMDV

tPMR

FIFO Output Register

W1 (Remains valid in Mail2 Register after read)

tENS1

tENH

tENS2

tENH

tENS2

tENH

tPMF

tPMF

W1