Timing SpecificationsThe following specifications assume:
- All Filtering has been disabled.
- The Latching options have been left at the default setting of (CS and WT active).
- Latch delay has been disabled.
Enabling Filtering and/or Latch delaying adds 10-40ns to the Tcr-2. Tcr-3 and Tcr-4 specs. Enabling Latch on (CS) or Latch on (CS and NOT OE) with MINIMUM delay selected reduces Twp to 20ns. Higher delay settings could result in longer Trdc & Twtc requirements.
|Trdc||Read Cycle||Time for a complete read cycle||
|Tacc||Address Access||Time from address stable to data valid||45ns (max)|
|Time from CS active to data valid||
|Time from OE active to data valid||
|Todo||OE to data disable||Time from rising edge OE to data float||0 - 6ns|
|Tcod||CS to data disable||Time from rising edge CS to data float||0 - 12ns|
|Tcr-1||Cycle Recovery time, valid data||Minimum recovery after a read||0ns (min)|
Write Cycles (WT controlled/CS controlled):
|Twtc||Write Cycle||Time for a complete write cycle||45ns (max)|
|Tas||Address Setup time||Address stable to falling edge WT/CS||0ns (min)|
|Tah||Address Hold time||Address held after rising edge WT/CS||0ns (min)|
|Tds||Data Setup time||Data stable to rising edge WT/CS||10ns (min)|
|Tdh||Data Hold time||Data held after rising edge WT/CS||0ns (min)|
|Twp||WT pulse width||Minimum WT active pulse width||25ns (min)|
|Todw||WT to data disable||Time from falling edge WT to data float (if CS & OE were active)||0 - 12ns|
|Tcr-2||Cycle recovery time, writes||Minimum recovery time after a write||20ns (min)|
Snap-shot and Trigger functions
|Tcr-3||Cycle Recovery time, reads||Minimum recovery time after a read||10ns (min)|
|Tcr-4||Cycle recovery time, writes||Minimum recovery time after a write||25ns (min)|
|Top||OE pulse width||Minimum OE active pulse||25ns (min)|