X28HC256 Datasheet, PDF (13/15 Pages) Xicor Inc. – 5 Volt, Byte Alterable E2PROM

X28HC256
Write Cycle Limits
Symbol
t_WC(7)
t_AS
t_AH
t_CS
t_CH
t_CW
t_OES
t_OEH
t_WP
t_WPH(8)
t_DV
t_DS
t_DH
t_DW(8)
t_BLC
Parameter
Write cycle time
Address setup time
Address hold time
Write setup time
Write hold time
CE pulse width
OE HIGH setup time
OE HIGH hold time
WE pulse width
WE HIGH recovery (page write only)
Data valid
Data setup
Data hold
Delay to next write after polling is true
Byte load cycle
Min.
0
50
0
0
50
0
0
50
50
50
0
10
0.15
Typ.⁽⁶⁾
3
Max.
5
1
100
Unit
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
ns
ns
µs
µs
Notes: (6) Typical values are for T_A = 25°C and nominal supply voltage.
(7) t_WC is the minimum cycle time to be allowed from the system perspective unless polling techniques are used. It is the maximum time
the device requires to automatically complete the internal write operation.
(8) t_WPH and t_DW are periodically sampled and not 100% tested.
WE Controlled Write Cycle
t_WC
Address
t_AS
t_AH
t_CS
t_CH
CE
OE
t_OES
t_OEH
t_WP
WE
Data In
Data Out
Data Valid
t_DS
t_DH
HIGH Z
13
FN8108.1
May 17, 2006