M27V160-100K1 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
M27V160-100K1 Datasheet PDF : 25 Pages
| |||
Device description
2
Device description
M27V160
2.1
2.2
Table 2 lists the operating modes of the M27V160. A single power supply is required in the
read mode. All inputs are TTL compatible except for VPP and 12V on A9 for the Electronic
Signature.
Table 2. Operating Modes (1)
Mode
E
G BYTEVPP A9
Read Word-wide
VIL
VIL
VIH
X
Read Byte-wide Upper
VIL
VIL
VIL
X
Read Byte-wide Lower
VIL
VIL
VIL
X
Output Disable
VIL
VIH
X
X
Program
VIL Pulse VIH
VPP
X
Verify
VIH
VIL
VPP
X
Program Inhibit
VIH
VIH
VPP
X
Standby
VIH
X
X
X
Electronic Signature
VIL
VIL
VIH
VID
1. X = VIH or VIL, VID = 12V ± 0.5V.
Q15A–1 Q14-Q8 Q7-Q0
Data Out Data Out Data Out
VIH
Hi-Z Data Out
VIL
Hi-Z Data Out
Hi-Z
Hi-Z
Hi-Z
Data In Data In Data In
Data Out Data Out Data Out
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Code Codes Codes
Read mode
The M27V160 has two organisations, Word-wide and Byte-wide. The organisation is
selected by the signal level on the BYTEVPP pin. When BYTEVPP is at VIH the Word-wide
organisation is selected and the Q15A–1 pin is used for Q15 Data Output. When the
BYTEVPP pin is at VIL the Byte-wide organisation is selected and the Q15A–1 pin is used for
the Address Input A–1. When the memory is logically regarded as 16 bit wide, but read in
the Byte-wide organisation, then with A–1 at VIL the lower 8 bits of the 16 bit data are
selected and with A–1 at VIH the upper 8 bits of the 16 bit data are selected.
The M27V160 has two control functions, both of which must be logically active in order to
obtain data at the outputs. In addition the Word-wide or Byte- wide organisation must be
selected.
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.
Standby mode
The M27V160 has a standby mode which reduces the active current from 20mA to 20µA
with low voltage operation VCC ≤ 3.6V, see Read Mode DC Characteristics table for
details.The M27V160 is placed in the standby mode by applying a CMOS high signal to the
8/26
|
|
Share Link: 