SMJ27C040 Datasheet, PDF (2/11 Pages) Austin Semiconductor – UV Erasable Programmable Read-Only Memory

Austin Semiconductor, Inc.
UVEPROM
SMJ27C040
FUNCTIONAL BLOCK DIAGRAM*
A0 ¹²
A1 ¹¹
A2
A3
10
9
A4
A5
A6
A7
A8
A9
8
7
6
5
27
26
23
A10
A11
A12
A13
A14
A15
25
4
28
29
3
A16 ²
A17 ³⁰
A18 ³¹
E\ ²²
G\ ²⁴
EPROM 524,288 x 8
0
A
A
A
A0
524,287
A
A
A
A
A
18
[PWR DWN]
&
EN
13
14
15
17
18
19
20
21
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
* This symbol is in accordance with ANSI/IEEE std 91-1984 and IEC Publication 617-12. Pin numbers shown are for the J package.
OPERATION
The seven modes of operation are listed in Table 1. The read mode requires a single 5V supply. All inputs are TTL level
except for V_PP during programming (13V), and V_H (12V)i on A9 for signature mode.
TABLE 1. OPERATION MODES
FUNCTION
E\
G\
V_PP
V_CC
A9
A0
DQ0-DQ7
Read
V_IL
V_IL
V_CC
V_CC
X
X
Data Out
Output Disable
V_IL
V_IH
V_CC
V_CC
X
X
High-Z
Standby
V_IH
X
V_CC
V_CC
X
X
High-Z
Programming
V_IL
V_IH
V_PP
V_CC
X
X
Data In
Program Inhibit
V_IH
V_IH
V_PP
V_CC
X
X
High-Z
Verify
V_IH
V_IL
V_PP
V_CC
X
X
Data Out
Signature Mode
V_IL
V_IL
V_CC
V_CC
V_IH*
V_IL
MFG Code 97
V_IL
Device Code 50
* X can be V_IL or V_IH.
iV_H = 12V ± 0.5V
SMJ27C040
Rev. 1.0 9/01
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
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