參數(shù)資料
型號： M27C160-50K1TR
廠商： STMICROELECTRONICS
元件分類： PROM
英文描述： 1M X 16 OTPROM, 50 ns, PQCC44
封裝： PLASTIC, LCC-44
文件頁數(shù)： 25/26頁
文件大?。?/td> 267K
代理商： M27C160-50K1TR
Device description
M27C160
2
Device description
Table 2 lists the operating modes of the M27C160. 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.
Note:
X = V
IH or VIL, VID = 12V ± 0.5V.
2.1
Read mode
The M27C160 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 M27C160 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.
2.2
Standby mode
The M27C160 has a standby mode which reduces the active current from 50mA to 100A.
The M27C160 is placed in the standby mode by applying a CMOS high signal to the E input.
Table 2.
Operating Modes
Mode
E
G
BYTEVPP
A9
Q15A–1
Q8-Q14
Q7-Q0
Read Word-wide
VIL
VIH
X
Data Out
Read Byte-wide Upper
VIL
XVIH
Hi-Z
Data Out
Read Byte-wide Lower
VIL
XVIL
Hi-Z
Data Out
Output Disable
VIL
VIH
X
Hi-Z
Program
VIL Pulse
VIH
PP
X
Data In
Verify
VIH
VIL
VPP
X
Data Out
Program Inhibit
VIH
VPP
X
Hi-Z
Standby
VIH
X
Hi-Z
Electronic Signature
VIL
VIH
VID
Code
Codes
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