Owner manual

Preliminary W49F020
- 12 -
AC Characteristics, continued
Read Cycle Timing Parameters
(V
CC
= 5.0V ±10%, V
CC
= 0V, T
A
= 0 to 70° C)
PARAMETER SYM. W49F020-70 W49F020-90 UNIT
MIN. MAX. MIN. MAX.
Read Cycle Time TRC
70 - 90 - nS
Chip Enable Access Time TCE
- 70 - 90 nS
Address Access Time TAA
- 70 - 90 nS
Output Enable Access Time T
OE
- 35 - 40 nS
CE Low to Active Output
T
CLZ
0 - 0 - nS
OE Low to Active Output
T
OLZ
0 - 0 - nS
CE High to High-Z Output
T
CHZ
- 25 - 25 nS
OE High to High-Z Output
T
OHZ
- 25 - 25 nS
Output Hold from Address Change TOH 0 - 0 - nS
Write Cycle Timing Parameters
PARAMETER SYMBOL MIN. TYP. MAX. UNIT
Address Setup Time T
AS
0 - - nS
Address Hold Time TAH 50 - - nS
WE and
CE
Setup Time
T
CS 0 - - nS
WE and
CE
Hold Time
T
CH 0 - - nS
OE
High Setup Time
T
OES 0 - - nS
OE
High Hold Time
T
OEH 0 - - nS
CE Pulse Width
T
CP 100 - - nS
WE Pulse Width
T
WP 100 - - nS
WE High Width
T
WPH 100 - - nS
Data Setup Time TDS 50 - - nS
Data Hold Time TDH 0 - - nS
Byte programming Time T
BP
- 10 50
µS
Erase Cycle Time TEC - 0.1 1 S
Note: All AC timing signals observe the following guidelines for determining setup and hold times:
(a) High level signal's reference level is V
IH and (b) low level signal's reference level is VIL.