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M27W201-80NZ6TR bảng dữ liệu(PDF) 8 Page - STMicroelectronics

tên linh kiện M27W201-80NZ6TR
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
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Device Description
M27W201
8/24
2
Device Description
The operating modes of the M27W201 are listed in the Operating Modes table. A single
power supply is required in the read mode. All inputs are TTL levels except for VPP and 12V
on A9 for Electronic Signature.
Table 1. Operating Modes
Note:
X = V
IH or VIL, VID = 12V ± 0.5V.
2.1
Read mode
The M27W201 has two control functions, both of which must be logically active in order to
obtain data at the outputs. Chip Enable (E) is the power control and should be used for
device selection. Output Enable (G) is the output control and should be used to gate data to
the output pins, independent of device selection. Assuming that the addresses are stable,
the address access time (tAVQV) is equal to the delay from E to output (tELQV). Data is
available at the output after a delay of tGLQV from the falling edge of G, assuming that E has
been low and the addresses have been stable for at least tAVQV-tGLQV.
2.2
Standby mode
The M27W201 has a standby mode which reduces the supply current from 15mA to 15µA
with low voltage operation VCC ≤ 3.6V, see Read Mode DC Characteristics table for
details.The M27W201 is placed in the standby mode by applying a CMOS high signal to the
E input. When in the standby mode, the outputs are in a high impedance state, independent
of the G input.
Table 2.
Operating modes
Mode
E
G
P
A9
VPP
Q7-Q0
Read
VIL
VIL
XX
VCC or VSS
Data Out
Output Disable
VIL
VIH
XX
VCC or VSS
Hi-Z
Program
VIL
VIH
VIL Pulse
X
VPP
Data In
Verify
VIL
VIL
VIH
XVPP
Data Out
Program Inhibit
VIH
XX
X
VPP
Hi-Z
Standby
VIH
XX
X
VCC or VSS
Hi-Z
Electronic Signature
VIL
VIL
VIH
VID
VCC
Codes


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