X28C256D Xicor, X28C256D Datasheet - Page 13

• Manufacturer Part Number: X28C256D
• Description: 5 Volt/ Byte Alterable E2PROM
• Manufacturer: Xicor

X28C256
WRITE CYCLE LIMITS
WE Controlled Write Cycle
Notes: (6) Typical values are for T
DATA OUT
ADDRESS
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
DATA IN
WC
AS
AH
CS
CH
CW
OES
OEH
WP
WPH
WPH2 (8)
DV
DS
DH
DW
BLC
(7) t
(8) t
(9) For faster t
(7)
(9)
WE
OE
CE
time the device requires to automatically complete the internal write operation.
the three-byte SDP command sequence and before writing the first byte of data to the array. Refer to Figure 6 which illustrates
the t
WC
WPH
is the minimum cycle time to be allowed from the system perspective unless polling techniques are used. It is the maximum
WPH2
is the normal page write operation WE recovery time. t
requirement.
WC
and t
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
SDP WE Recovery
Data Valid
Data Setup
Data Hold
Delay to Next Write
Byte Load Cycle
BLC
, refer to X28HC256 or X28VC256.
Parameter
A
t AS
= 25 C and nominal supply voltage.
t OES
t CS
t DV
t AH
t WP
DATA VALID
t DS
13
Min.
150
100
100
WPH2
10
10
50
50
10
10
0
0
0
1
1
(9)
t OEH
is the WE recovery time needed only after the end of issuing
HIGH Z
t WC
t DH
t CH
Typ.
5
(6)
Max.
100
10
1
3855 FHD F06
Units
3855 PGM T11.1
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
s
s
s
s