Mitsubishi’s Static RAM cards provide large
memory capacities on a device approximately the
size of a credit card(85.6mm×54mm×3.3mm).
The cards use a 8/16 bit data bus.The devices
use a replaceable lithium battery to maintain data.
Available in 64K byte-4M byte capacities,
Mitsubishi’s Static RAM cards are available with
a 68-pin, two-piece connector.
Electrostatic discharge protectiton to 15kV
Buffered interface
68-pin connector
8-bit and 16-bit data width
Write protect switch
Battery voltage pin
LS Type Wide Range operating temperature
Ta= -20 to 70°C
FEATURES
Uses TSOP (Thin Small Outline Package) to
achieve very high memory density coupled
with high reliability, without enlarging card
size
Type namecapacitywidth(bits)memorybatteryorganizationdrawingholder
MF365A-LCDATXX64KB256K bit SRAM×2
MF3129-LCDATXX128KB256K bit SRAM×4
MF3257-LCDATXX256KB1M bit SRAM×2
MF3513-LCDATXX512KB1M bit SRAM×4
MF31M1-LCDATXX1MB1M bit SRAM×8
MF32M1-LCDATXX2MB1M bit SRAM×16
MF34M1-LCDATXX4MB8/16NONO4M bit SRAM×868P-003Screw type
MF365A-LSDATXX64KB256K bit SRAM×2
MF3129-LSDATXX128KB256K bit SRAM×4
MF3257-LSDATXX256KB1M bit SRAM×2
MF3513-LSDATXX512KB1M bit SRAM×4
MF31M1-LSDATXX1MB1M bit SRAM×8
MF32M1-LSDATXX2MB1M bit SRAM×16
MF34M1-LSDATXX4MB4M bit SRAM×8
APPLICATIONS
Office automation Data Communications
Computers Industrial
Telecommunications Consumer
MITSUBISHI
ELECTRIC
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PIN ASSIGNMENT
1
GND
Ground
35
GND
Ground
2D336
CD1#
Card detect 1
3D437
D114D5
Data I/O
38
D125D639D13
Data I/O
6D740
D147CE1#
Card enable 1
41
D158A10
Address input
42
CE2#
Card enable 2
9
OE#
Output enable
43NC10
A1144NC
No connection
11A945NC12A8 Address input
46
A17
A17(NC for≤128KB types)
13
A1347A18
A18(NC for≤256KB types)
14
A1448A19
A19(NC for≤512KB types)
15
WE#
Write enable
49
A20
A20(NC for≤1MB types)
16NCNo connection
50
A21
A21(NC for≤2MB types)
17
VCCPower supply voltage
51
VCCPower supply voltage
18NCNo connection
52NCNo connection
19
A16
A16(NC for 64KB type)
53NCNo connection
20
A1554NC21A1255NC22A756NC23A657NC
No connection
24A5 Address input
58NC25A459NC26A360NC27A261
REG#
REG function
28A162
BVD2
Battery voltage detect 2
29A063
BVD1
Battery voltage detect 1
30D064D831D1 Data I/O
65D9 Data I/O
32D266
D1033WP
Write protect
67
CD2#
Card detect 2
34
GND
Ground
68
GND
Ground
Two-Piece Type (68-pin)
MITSUBISHI MEMORY CARD
STATIC RAM CARDS
PinPin
Symbol
No. No.
Function
Symbol
Function
Address input
WRITE PROTECT MODE (WP)
When the write protect switch is switched on, this
card goes into a write protect mode that can read
but not write data.
In this mode, the WP pin becomes “H” level.
At the shipment the write protect switch is switched
off (Normal mode : The card can be written ; WP pin
indicates “L” level).
StandbyXHHXXXHigh-impedanceHigh-impedanceStandby
Read A (16bit) commonHLLLHXOdd Byte Data outEven Byte Data outActive
Write A (16bit) commonHLLHLXOdd Byte Data inEven Byte Data inActive
Read B (8bit) commonHLHLHLHigh-impedanceEven Byte Data outActive
HLHLHHHigh-impedanceOdd Byte Data outActive
Write B (8bit) commonHLHHLLHigh-impedanceEven Byte Data inActive
HLHHLHHigh-impedanceOdd Byte Data inActive
Read C (8bit) commonHHLLHXOdd Byte Data outHigh-impedanceActive
Write C (8bit) commonHHLHLXOdd Byte Data inHigh-impedanceActive
Output disableXXXHHXHigh-impedanceHigh-impedanceActive
Read A (16bit) attributeLLLLHXData out (unknown)Data out (FFh)Active
Read B (8bit) attributeLLHLHLHigh-impedanceData out (FFh)Active
LLHLHHHigh-impedanceData out (unknown)Active
Read C (8bit) attributeLHLLHXData out (unknown)High-impedanceActive
I/O (D15~D8)I/O (D7~D0)ICC
Note 1 : H=VIH, L=VIL, X=VIH or VIL
MITSUBISHI
ELECTRIC
3/11
MITSUBISHI MEMORY CARD
STATIC RAM CARDS
ABSOLUTE MAXIMUM RATINGS
SymbolParameterConditionsRatingsUnit
VCCSupply voltage-0.3~6.0V
ViInput voltageWith respect to GND-0.3~VCC+0.3V
VoOutput voltage0~VCCV
Topr1Operating temperature 1Read, Write, OperationLC series 0~70°C
LS series -20~70°C
Topr2Operating temperature 2Data retentionLC series 0~70°C
LS series -20~70°C
TstgStorage temperature-30~80°C
RECOMMENDED OPERATING CONDITIONS (LC series Ta= 0~55°C, unless otherwise noted)
(LS series Ta=-20~70°C, unless otherwise noted)
(LS series Ta=-20~70°C, VCC=4.50~5.25V, unless otherwise noted)
Limits
SymbolParameter
tCWWrite cycle time200ns
tw(WE)Write pulse width120ns
tsu(A)Address set up time20ns
tsu(A-WEH)Address set up time with respect to WE# high140ns
tsu(CE-WEH)Card enable set up time with respect to WE# high140ns
tsu(D-WEH)Data set up time with respect to WE# high60ns
th(D)Data hold time30ns
trec(WE)Write recovery time30ns
tdis(WE)Output disable time (from WE#)90ns
tdis(OE)Output disable time (from OE#)90ns
ten(WE)Output enable time (from WE#)5ns
ten(OE)Output enable time (from OE#)5ns
tsu(OE-WE)OE# set up time with respect to WE# low10ns
th(OE-WE)OE# hold time with respect to WE# high10ns
(ten and tdis are measured when output voltage is± 500mV from steady state. )
Load :100pF+1 TTL gate
5pF+1 TTL gate (at ten and tdis measuring)
7 : Writing is executed in overlap of CE# and WE# are “L” level. (only for Common Memory)
8 : Don’t apply inverted phase signal externally when Dm pin is in output mode.
9 : CE# is indicated as follows:
Read A/Write A : CE#=CE1#=CE2#
Read B/Write B : CE#=CE1#, CE2#=“H” level
Read C/Write C : CE#=CE2#, CE1#=“H” level
MITSUBISHI
ELECTRIC
9/11
MITSUBISHI MEMORY CARD
STATIC RAM CARDS
ELECTRICAL CHARACTERISTICS
BATTERY BACKUP (LC series Ta= 0~55°C, unless otherwise noted)(LS series Ta=-20~70°C, unless otherwise noted)