M5M5V408BFP-85L Datasheet, PDF (3/14 Pages) Mitsubishi Electric Semiconductor – 4194304-BIT (524288-WORD BY 8-BIT) CMOS STATIC RAM

revision-K1.0e, ' 98.09.07
M5M5V408BFP/TP/RT/KV/KR
MITSUBISHI LSIs
4194304-BIT (524288-WORD BY 8-BIT) CMOS STATIC RAM
FUNCTION
The M5M5408BFP,TP,RT,KV,KR is organized as 524,288-
words by 8-bit. These devices operate on a single +2.7~3.6V
power supply, and are directly TTL compatible to both input
and output. Its fully static circuit needs no clocks and no
refresh, and makes it useful.
A write operation is executed during the S low and W low
overlap time. The address(A0~A18) must be set up before
the write cycle
A read operation is executed by setting W at a high level
and OE at a low level while S are in an active state(S=L).
When setting S at a high level, the chips are in a non-
selectable mode in which both reading and writing are
disabled. In this mode, the output stage is in a high-impedance
state, allowing OR-tie with other chips. Setting the OE at a high
level,the output stage is in a high-impedance state, and the
data bus contention problem in the write cycle is eliminated.
The power supply current is reduced as low as 0.3µA(25°C,
typical), and the memory data can be held at +2V power
supply, enabling battery back-up operation during power failure
or power-down operation in the non-selected mode.
FUNCTION TABLE
S W OE
HXX
LLX
L HL
L HH
Mode
Non selection
Write
Read
Read
BLOCK DIAGRAM
M5M5V408B
FP/TP/RT
A4 ⁸
A5 7
A6 ⁶
A7 5
A12 ⁴
A14 ³
A16 2
A17 ³⁰
A18 1
A15 31
M5M5V408BKV/KR
16
15
14
13
12
11
10
9
6
7
A10 ²³
31
A11 ²⁵
1
A9 ²⁶
2
A8 27
3
A13 ²⁸
4
DQ
High-impedance
Data input (D)
Data output (Q)
High-impedance
Icc
Standby
Active
Active
Active
MEMORY ARRAY
524288 WORDS
x 8 BITS
CLOCK
GENERATOR
A0 12
20
A1 ¹¹
19
A2 ¹⁰
18
A3 9
17
Pin
Function
A0 ~ A18 Address input
DQ1 ~ DQ8 Data input / output
S
Chip select input
W
Write control input
OE
Output inable input
Vcc
Power supply
GND Ground supply
M5M5V408BKV/KR
21
22
23
25
26
27
28
29
M5M5V408B
FP/TP/RT
13 _DQ1
14 DQ2
15 DQ3
17 DQ4
18 DQ5
19 DQ6
20 DQ7
21 DQ8
5
29 _W
30
22 _S
32
24 _OE
8
32 VCC
(3V)
24
16 GND
(0V)
MITSUBISHI ELECTRIC
3