UVEPROM
Austin Semiconductor, Inc.
OPERATION
The seven modes of operation for the SMJ27C512 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 for SNAP! Pulse), and 12V on A9 for signature mode.
SMJ27C512
AS27C512
TABLE 1. OPERATION MODES
FUNCTION
(PINS)
E\
G\ /V
PP
V
CC
A9
A0
DQ0-DQ7
MODE*
READ
V
IL
V
IL
V
CC
X
X
Data Out
OUTPUT
STANDBY PROGRAMMING
DISABLE
V
IL
V
IH
V
CC
X
X
High-Z
V
IH
X
V
CC
X
X
High-Z
V
IL
V
PP
V
CC
X
X
Data In
VERIFY
V
IL
V
IL
V
CC
X
X
Data Out
PROGRAM
SIGNATURE MODE
INHIBIT
V
IL
V
IH
V
PP
V
CC
X
X
High-Z
V
ID
V
IL
V
IL
V
CC
V
ID
V
IH
CODE**
MFG
DEVICE
97h
85h
NOTES:
* X can be V
IL
or V
IH
** Die is Texas Instruments. User can program on benchtop programmer by selecting either TMS27C512 or SMJ27C512 from the device
type selection menu.
SMJ27C512/AS27C512
Rev. 2.5 10/03
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
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