'97.4.7
MITSUBISHI LSIs
M5M5256DP,KP,FP,VP,RV -45LL-I,-55LL-I,-70LL-I,
-45XL-I,-55XL-I,-70XL-I
262144-BIT (32768-WORD BY 8-BIT) CMOS STATIC RAM
DESCRIPTION
PIN CONFIGURATION (TOP VIEW)
The M5M5256DP,KP,FP,VP,RV is 262,144-bit CMOS static RAMs
organized as 32,768-words by 8-bits which is fabricated using
high-performance 3 polysilicon CMOS technology. The use of
resistive load NMOS cells and CMOS periphery results in a high
density and low power static RAM. Stand-by current is small
enough for battery back-up application. It is ideal for the memory
systems which require simple interface.
A14
A12
Vcc
/W
28
27
26
25
1
2
3
A7
A6
A5
A4
A13
A8
4
24 A9
5
Especially the M5M5256DVP,RV are packaged in a 28-pin thin
small outline package.Two types of devices are available,
M5M5256DVP(normal lead bend type package),
M5M5256DRV(reverse lead bend type package). Using both types of
devices, it becomes very easy to design a printed circuit board.
A11
23
6
22 /OE
7
A3
21
20
19
A2
A1
A0
DQ1
DQ2
8
9
A10
/S
DQ8
10
11
12
18 DQ7
DQ6
DQ5
17
16
15
FEATURE
DQ3 13
GND
14
Power supply current
Active Stand-by
Access
time
DQ4
Type
Outline 28P4 (DP)
(max)
45ns
55ns
70ns
(max)
(max)
28P4Y (DKP)
28P2W-C (DFP)
M5M5256DP, KP, FP,VP,RV-45LL
M5M5256DP, KP, FP,VP,RV-55LL
M5M5256DP, KP, FP,VP,RV-70LL
40µA
(Vcc=5.5V)
A10
21
20
19
22
23
24A9
25A8
26A13
27
/W
28Vcc
1
2
3
4 A6
5 A5
6 A4
7 A3
/OE
A11
/S
DQ8
55mA
(Vcc=5.5V)
10µA
(Vcc=5.5V)
DQ7 18
DQ6 17
DQ5 16
DQ415
GND
DQ313
DQ2
DQ1
A0
M5M5256DP, KP, FP,VP,RV-45XL
M5M5256DP, KP, FP,VP,RV-55XL
M5M5256DP, KP, FP,VP,RV-70XL
45ns
55ns
70ns
0.05µA
(Vcc=3.0V,
Typical)
M5M5256DVP
- I
14
A14
A12
A7
•Single +5V power supply
•No clocks, no refresh
•Data-Hold on +2.0V power supply
•Directly TTL compatible : all inputs and outputs
•Three-state outputs : OR-tie capability
•/OE prevents data contention in the I/O bus
•Common Data I/O
12
11
10
9
A1
A2 8
Outline 28P2C-A (DVP)
•Battery backup capability
A2
A1
A0
•Low stand-by current··········0.05µA(typ.)
A3
A4
A5
8
9
10
7
6
5
4 A6
DQ111
PACKAGE
DQ2
DQ3
GND
DQ4
DQ5
DQ6
3 A7
2 A12
1 A14
12
13
M5M256DP
M5M5256DKP
M5M5256DFP
: 28 pin 600 mil DIP
: 28 pin 300 mil DIP
14
15
16
17
18
19
M5M5256DRV
- I
Vcc
28
: 28 pin 450 mil SOP
2
27 /W
26 A13
25 A8
M5M5256DVP,RV : 28pin 8 X 13.4 mm TSOP
DQ7
DQ8
/S 20
A10
APPLICATION
A9
A11
/OE
24
23
22
Small capacity memory units
21
Outline 28P2C-B (DRV)
MITSUBISHI
ELECTRIC
1