XRT79L74 Datasheet, PDF (68/70 Pages) Exar Corporation – 4 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC

XRT79L74
REV. P1.0.0
PRELIMINARY
4 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
TABLE 12: TIMING INFORMATION FOR THE RECEIVE UTOPIA INTERFACE BLOCK
Symbol
PARAMETER
MIN.
TYP
MAX.
UNITS
t59 Delay time from Read Enable false to RxUSoC bit being tri-
stated
1
11.5
16
ns
t61 RxUAddr[4:0] Hold Time from rising edge of RxUClk
1
ns
t62 RxUClav signal valid (not Hi-Z) from first RxUClk rising edge of
2.5
valid and correct RxUAddr[4:0]
8.6
ns
t63 RxUClav signal Hi-Z from first RxUClk rising edge of different
2.5
RxUAddr[4:0].
8.6
ns
t58 Delay time from Read Enable false to RxUPrty bit being tri-
stated
1
12
16
ns
t59 Delay time from Read Enable false to RxUSoC bit being tri-
stated
1
11.5
16
ns
t60 RxUAddr[4:0] Setup Time to rising edge of RxUClk
4
ns
t61 RxUAddr[4:0] Hold Time from rising edge of RxUClk
1
ns
t62 RxUClav signal valid (not Hi-Z) from first RxUClk rising edge of
1
valid and correct RxUAddr[4:0]
7.8
16
ns
t63 RxUClav signal Hi-Z from first RxUClk rising edge of different
1
RxUAddr[4:0].
9.2
16
ns
66