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M95256-RMN3T 반도체 회로 부품 판매점

256/128 Kbit Serial SPI Bus EEPROM With High Speed Clock



ST Microelectronics 로고
ST Microelectronics
M95256-RMN3T 데이터시트, 핀배열, 회로
M95256
M95128
256/128 Kbit Serial SPI Bus EEPROM
With High Speed Clock
PRELIMINARY DATA
s SPI Bus Compatible Serial Interface
s Supports Positive Clock SPI Modes
s 5 MHz Clock Rate (maximum)
s Single Supply Voltage:
– 4.5V to 5.5V for M95xxx
– 2.7V to 3.6V for M95xxx-V
– 2.5V to 5.5V for M95xxx-W
– 1.8V to 3.6V for M95xxx-R
s Status Register
s Hardware and Software Protection of the Status
Register
s BYTE and PAGE WRITE (up to 64 Bytes)
s Self-Timed Programming Cycle
s Resizeable Read-Only EEPROM Area
s Enhanced ESD Protection
s 100,000 Erase/Write Cycles (minimum)
s 40 Year Data Retention (minimum)
DESCRIPTION
These SPI-compatible electrically erasable
programmable memory (EEPROM) devices are
organized as 32K x 8 bits (M95256) and 16K x 8
bits (M95128), and operate down to 2.7 V (for the
8
1
PSDIP8 (BN)
0.25 mm frame
8
1
SO8 (MN)
150 mil width
Figure 1. Logic Diagram
VCC
14
1
TSSOP14 (DL)
169 mil width
8
1
SO8 (MW)
200 mil width
Table 1. Signal Names
C Serial Clock
D Serial Data Input
Q Serial Data Output
S Chip Select
W Write Protect
HOLD
Hold
VCC Supply Voltage
VSS Ground
D
C
S
W
HOLD
M95xxx
VSS
Q
AI01789C
March 2000
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
1/21


M95256-RMN3T 데이터시트, 핀배열, 회로
M95256, M95128
Figure 2A. DIP Connections
M95xxx
S1
Q2
8 VCC
7 HOLD
W3
6C
VSS 4
5D
AI01790C
Figure 2B. SO Connections
S
Q
W
VSS
M95xxx
18
27
36
45
AI01791C
VCC
HOLD
C
D
Figure 2C. TSSOP Connections
M95128
S
Q
NC
NC
NC
W
VSS
1 14
2 13
3 12
4 11
5 10
69
78
AI02346
VCC
HOLD
NC
NC
NC
C
D
Note: 1. NC = Not Connected
-V version), 2.5 V (for the -W version), and down
to 1.8 V (for the -R version of each device).
The M95256 and M95128 are available in Plastic
Dual-in-Line, Plastic Small Outline and Thin Shrink
Small Outline packages.
Each memory device is accessed by a simple
serial interface that is SPI bus compatible. The bus
signals are C, D and Q, as shown in Table 1 and
Figure 3.
The device is selected when the chip select input
(S) is held low. Communications with the chip can
be interrupted using the hold input (HOLD).
Table 2. Absolute Maximum Ratings 1
Symbol
Parameter
Value
Unit
TA Ambient Operating Temperature
-40 to 125
°C
TSTG
Storage Temperature
-65 to 150
°C
TLEAD
Lead Temperature during Soldering
PSDIP8: 10 sec
SO8: 40 sec
TSSOP14: t.b.c.
260
215
t.b.c.
°C
VO Output Voltage Range
-0.3 to VCC+0.6
V
VI Input Voltage Range
-0.3 to 6.5
V
VCC Supply Voltage Range
-0.3 to 6.5
V
VESD
Electrostatic Discharge Voltage (Human Body model) 2
4000
V
Note: 1. Except for the rating “Operating Temperature Range”, stresses above those listed in the Table “Absolute Maximum Ratings” may
cause permanent damage to the device. These are stress ratings only, and operation of the device at these or any other conditions
above those indicated in the Operating sections of this specification is not implied. Exposure to Absolute Maximum Rating
conditions for extended periods may affect device reliability. Refer also to the ST SURE Program and other relevant quality
documents.
2. MIL-STD-883C, 3015.7 (100 pF, 1500 )
2/21




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M95256-RMN3T

256/128 Kbit Serial SPI Bus EEPROM With High Speed Clock - ST Microelectronics