w27c512 Winbond Electronics Corp America, w27c512 Datasheet - Page 8

• Manufacturer Part Number: w27c512
• Description: 64k X 8 Electrically Erasable Eprom
• Manufacturer: Winbond Electronics Corp America

TIMING WAVEFORMS
AC Read Waveform
Erase Waveform
Address
OE/Vpp
Address
Data
OE/Vpp
Outputs
Vcc
CE
CE
14.0V
V
V
V
V
V
V
5V
V
V
V
V
V
V
IH
IL
IH
IL
IH
IL
IH
IL
IH
IL
IH
IL
T
OE
T
CE
T
Read
Company
SID
A0 = V
ACC
Others = V
High Z
A9 = 12.0V
DA
I
L
T
IL
T
Others = V
ACC
OE
A0 = VIH
Device
Read
SID
IL
08
T
VS
T
DS
T
T
T
OES
Others = V
PRT
AS
Data All One
A9 = 14.0V
Chip Erase
T
IL
PWE
T
T
T
T
ACC
OEH
DH
Address Valid
AHC
T
- 8 -
VR
T
V
T
IH
CE
VCS
Address Valid
T
T
ACV
OE
T
OEV
=250 nS
D
= 150 nS
OUT
Always = V
Erase Verify
3.75V
T
IL
Address Valid
ACV
=250 nS
D
OUT
Valid Output
V
IH
Address Valid
Blank Check
Read Verify
T
T
ACC
OH
T
OE
W27C512
D
T
OUT
DF
Address Valid
High Z