ST95020 [STMICROELECTRONICS]

4K/2K/1K Serial SPI EEPROM with Positive Clock Strobe; 4K / 2K / 1K串行SPI EEPROM,带有正时钟选通
ST95020
型号: ST95020
厂家: ST    ST
描述:

4K/2K/1K Serial SPI EEPROM with Positive Clock Strobe
4K / 2K / 1K串行SPI EEPROM,带有正时钟选通

可编程只读存储器 电动程控只读存储器 电可擦编程只读存储器 时钟
文件: 总18页 (文件大小:111K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
ST95040  
ST95020, ST95010  
4K/2K/1K Serial SPI EEPROM with Positive Clock Strobe  
1 MILLIONERASE/WRITE CYCLES  
40 YEARSDATARETENTION  
SINGLE SUPPLYVOLTAGE  
– 4.5V to 5.5V for ST950x0  
– 2.5V to 5.5V for ST950x0W  
SPI BUS COMPATIBLE SERIALINTERFACE  
8
2 MHzCLOCK RATE MAX  
8
BLOCK WRITE PROTECTION  
STATUS REGISTER  
1
1
16 BYTE PAGE MODE  
PSDIP8 (B)  
SO8 (M)  
0.25mm Frame  
150mil Width  
WRITE PROTECT  
SELF-TIMED PROGRAMMINGCYCLE  
E.S.D.PROTECTION GREATER than 4000V  
SUPPORTS POSITIVE CLOCK SPI MODES  
Figure 1. Logic Diagram  
DESCRIPTION  
The ST950x0 is a family of Electrically Erasable  
Programmable Memories (EEPROM) fabricated  
with STMicroelectronics’s High Endurance Single  
Polysilicon CMOS technology. Each memory is  
accessed by a simple SPI bus compatible serial  
interface. The bus signals are a serial clock input  
(C), a serial data input (D) and a serialdata output  
(Q).  
V
CC  
D
C
S
Q
Table 1. Signal Names  
ST950x0  
C
Serial Clock  
Serial Data Input  
Serial Data Output  
Chip Select  
Write Protect  
Hold  
W
D
HOLD  
Q
S
V
SS  
W
AI01435B  
HOLD  
VCC  
VSS  
Supply Voltage  
Ground  
June 1998  
1/18  
ST95040, ST95020, ST95010  
Figure 2A. DIP Pin Connections  
Figure 2B. SO Pin Connections  
ST950x0  
ST950x0  
S
Q
1
2
3
4
8
V
S
Q
1
2
3
4
8
V
CC  
HOLD  
CC  
7
HOLD  
7
W
6
5
C
D
W
6
5
C
D
V
V
SS  
SS  
AI01436B  
AI01437B  
Table 2. Absolute Maximum Ratings (1)  
Symbol  
TA  
Parameter  
Value  
Unit  
Ambient Operating Temperature  
Storage Temperature  
–40 to 125  
–65 to 150  
°C  
TSTG  
C
°
TLEAD  
Lead Temperature, Soldering  
(SO8 package)  
(PSDIP8 package)  
40 sec  
10 sec  
215  
260  
C
°
VO  
VI  
Output Voltage  
–0.3 to VCC +0.6  
–0.3 to 6.5  
–0.3 to 6.5  
4000  
V
Input Voltage with respect to Ground  
Supply Voltage  
V
V
V
V
VCC  
Electrostatic Discharge Voltage (Human Body model) (2)  
Electrostatic Discharge Voltage (Machine model) (3)  
VESD  
500  
Notes: 1. Except for the rating ”Operating Temperature Range”, stresses above those listed in the Table ”AbsoluteMaximum 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 STMicroelectronics SURE Program and  
other relevant quality documents.  
2. MIL-STD-883C, 3015.7 (100pF, 1500)  
3. EIAJ IC-121 (Condition C) (200pF, 0)  
DESCRIPTION  
SIGNALS DESCRIPTION  
(cont’d)  
SerialOutput (Q). Theoutput pinis used totrans-  
fer data serially out of the Memory. Data is shifted  
out on the falling edge of the serial clock.  
Serial Input (D). The input pin is used to transfer  
dataseriallyinto thedevice.Itreceivesinstructions,  
addresses, and the data to be written. Input is  
latched on the rising edge of the serial clock.  
The device connectedto the bus is selectedwhen  
thechip selectinput(S) goeslow. Communications  
with the chip can be interrupted with a hold input  
(HOLD). The write operation is disabled by a write  
protect input (W).  
Data is clocked in during the low to high transition  
of clock C, data is clocked out during the high to  
low transitionof clock C.  
2/18  
ST95040, ST95020, ST95010  
Figure 3. Data and Clock Timing  
CPOL  
0
CPHA  
0
C
1
1
C
D or Q  
MSB  
LSB  
AI01438  
Figure 4. Microcontroller and SPI Interface Set-up  
MICROCONTROLLER  
(ST6, ST7, ST9, ST10, OTHERS)  
SCK  
C
SPI Interface with  
(CPOL, CPHA) =  
(’0’, ’0’) or (’1’, ’1’)  
ST95xx0  
SDI  
Q
D
SDO  
AI01439B  
Serial Clock (C).  
The serial clock provides the  
power-on, a high to low transition on S is required  
prior to the start of any operation.  
timing of the serial interface. Instructions, ad-  
dresses,ordatapresentat theinputpinare latched  
on the rising edge of the clock input, while data on  
theQ pinchangesafterthe fallingedgeof the clock  
input.  
Write Protect (W).  
This pin is for hardware write  
protection. When W is low, writes to the Memory  
aredisabledbutanyotheroperationsstayenabled.  
When Wis high,all writes operationsare available.  
W going low at any time before the last bit D0 of  
thedata streamwill resetthewrite enablelatchand  
prevent programming. No action on W or on the  
write enable latch can interrupt a write cycle which  
has commenced.  
Chip Select (S).  
When S is high, the Memory is  
deselected and the Q output pin is at high imped-  
ance and, unless an internal write operation is  
underwaythe Memorywill be in the standby power  
mode. S low enables the Memory, placing it in the  
active power mode. It should be noted that after  
3/18  
ST95040, ST95020, ST95010  
Hold (HOLD).  
The HOLD pin is used to pause  
operation. If an invalid instruction is sent (one not  
contained in Table 3), the chip is automatically  
deselected. For operations that read or write data  
in the memory array, bit 3 of the instruction is the  
MSB of the address, otherwise, it is a don’t care.  
serial communications with the Memory without  
resetting the serial sequence. To take the Hold  
condition into account, the product must be se-  
lected (S = 0). Then the Hold state is validated by  
a high tolow transitionon HOLDwhen C islow. To  
resumethecommunications,HOLDis broughthigh  
while C is low. During the Hold conditionD, Q, and  
C are at a high impedance state.  
Write Enable (WREN) and Write Disable (WRDI)  
The Memory contains a write enable latch. This  
latch must be set prior to every WRITE or WRSR  
operation. The WREN instructionwill set the latch  
and the WRDI instruction will reset the latch. The  
latch is reset under the following conditions:  
When the Memoryis underthe Hold condition,it is  
possibletodeselectthedevice.However,the serial  
communications will remain paused after a rese-  
lect, and the chip will be reset.  
– W pin is low  
– Power on  
TheMemorycan bedrivenbyamicrocontrollerwith  
its SPI peripheral running in either of the two fol-  
lowingmodes:(CPOL, CPHA) = (’0’, ’0’)or (CPOL,  
CPHA) = (’1’, ’1’).  
– WRDI instruction executed  
– WRSR instruction executed  
– WRITEinstruction executed  
Forthesetwo modes,inputdatais latchedinby the  
low to high transitionof clockC, and output data is  
available from the high to low transition of Clock  
(C).  
As soon as the WREN or WRDI instruction is  
received by the memory, the circuit executes the  
instruction and enters a wait mode until it is dese-  
lected.  
Thedifferencebetween(CPOL, CPHA)= (0,0)and  
(CPOL, CPHA) = (1, 1) is the stand-by polarity: C  
remains at ’0’ for (CPOL, CPHA) = (0, 0) and C  
remainsat ’1’for(CPOL,CPHA)=(1,1)whenthere  
is no data transfer.  
Read Status Register (RDSR)  
TheRDSRinstructionprovidesaccesstothestatus  
register. The status register may be read at any  
time, even during a writeto the memory operation.  
If a Read Status register reaches the 8th bit of the  
Status register, an additional 9th clock pulse will  
wrap around to read the 1st bit of the Status Reg-  
ister  
OPERATIONS  
All instructions, addresses and data are shifted in  
and out of the chip MSB first. Data input (D) is  
sampled on the first rising edge of clock (C) after  
thechip select (S) goes low. Prior to any operation,  
a one-byte instruction code must be enteredin the  
chip. This code is entered via the data input (D),  
and latched on the rising edge of the clock input  
(C). To enter an instructioncode, the productmust  
have been previously selected (S = low). Table 3  
shows the instruction set and format for device  
The status register format is as follows:  
b7  
1
b0  
1
1
1
BP1 BP0 WEL WIP  
BP1, BP0: Read and write bits  
WEL, WIP: Read only bits.  
b7 to b4: Read only bits.  
Table 3. Instruction Set  
Instruction  
WREN  
WRDI  
Description  
Set Write Enable Latch  
Instruction Format  
0000 0110  
Reset Write Enable Latch  
Read Status Register  
0000 0100  
RDSR  
0000 0101  
WRSR  
READ  
Write Status Register  
0000 0001  
Read Data from Memory Array  
Write Data to Memory Array  
0000 A8011  
0000 A8010  
WRITE  
Notes: A8 = 1, Upper page selected on ST95040.  
A8 = 0, Lower page selected on ST95040.  
4/18  
ST95040, ST95020, ST95010  
Figure 5. Block Diagram  
HOLD  
High Voltage  
Generator  
W
S
Control Logic  
C
D
Q
I/O Shift Register  
Address Register  
and Counter  
Data  
Register  
Status  
Block  
Protect  
16 Bytes  
X Decoder  
AI01272  
During a write to the memory operation to the  
memory array, all bits BP1, BP0, WEL, WIP are  
valid and can be read. During a write to the status  
register, only the bits WEL and WIP are valid and  
can be read. The values of BP1 and BP0 read at  
thattimecorrespondto thepreviouscontentsof the  
status register.  
When set to a ’1a writeis in progress,when set to  
a ’0’ no write is in progress.  
The Write Enable Latch (WEL) read-only bit indi-  
catesthe statusofthe writeenable latch. When set  
to a ’1’ the latch is set, when set to a ’0’ the latch is  
reset. The Block Protect (BP0 and BP1) bits indi-  
cate the extent of the protectionemployed. These  
bits are set by the user issuing the WRSR instruc-  
tion. These bits are non-volatile.  
TheWrite-In-Process (WIP) read-onlybit indicates  
whetherthe Memory is busywith a writeoperation.  
5/18  
ST95040, ST95020, ST95010  
Figure 6. Read Operation Sequence  
S
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23  
C
INSTRUCTION  
A8  
BYTE ADDRESS  
A7 A6 A5 A4 A3 A2 A1 A0  
D
Q
DATA OUT  
HIGH IMPEDANCE  
1
7
6
5
4
3
2
0
AI01440  
Notes: A8 = A7 = 0 on ST95010; A8 = 0 on ST95020; A8 is only activeon ST95040.  
Table 4. Write Protected Block Size  
Status Register Bits  
Protected Block  
Array Address Protected  
ST95020 ST95010  
BP1  
BP0  
ST95040  
none  
0
0
1
1
0
1
0
1
none  
none  
none  
Upper quarter  
Upper half  
180h - 1FFh  
100h - 1FFh  
000h - 1FFh  
C0h - FFh  
60h - 7Fh  
40h - 7Fh  
00h - 7Fh  
80h - FFh  
Whole memory  
00h - FFh  
Write Status Register (WRSR)  
address (A7-A0), each bit being latched-in during  
the rising edge of the clock (C). Bit 3 (seeTable 3)  
of the read instruction contains address bit A8  
(mostsignificantaddressbit). Thenthe datastored  
inthememory attheselectedaddressis shiftedout  
on the Q output pin; each bit being shifted out  
during the falling edge of the clock (C). The data  
stored in the memory at the next address can be  
read in sequence by continuing to provide clock  
pulses. The byte address is automatically incre-  
mented to the next higher address after each byte  
of data is shiftedout. When the highestaddress is  
reached,theaddresscounterrollsover to0h allow-  
ing the read cycle to be continuedindefinitely.The  
read operation is terminated by deselecting the  
chip.Thechipcanbe deselectedat anytime during  
data output. Any read attempt during a write cycle  
will be rejected and will deselect the chip.  
TheWRSR instructionallowsthe usertoselect the  
size of protected memory. The user may read the  
blocks but will be unable to write within the pro-  
tected blocks. The blocks and respective WRSR  
control bits are shown in Table 4.  
When the WRSR instruction and the 8 bits of the  
Status Register are latched-in, the internal write  
cycle is then triggered by the rising edge of S.  
Thisrising edge of S must appearno laterthan the  
16th clock cycle of the WRSR instruction of the  
Status Register content (it must not appeara 17th  
clock pulse before the rising edge of S), otherwise  
the internal write sequence is not performed.  
Read Operation  
Thechipis firstselectedbyputtingS low.Theserial  
one byte read instruction is followedby a one byte  
6/18  
ST95040, ST95020, ST95010  
Figure 7. Write Enable Latch Sequence  
S
C
D
Q
0
1
2
3
4
5
6
7
HIGH IMPEDANCE  
AI01441  
Figure 8. Byte Write Operation Sequence  
S
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23  
C
INSTRUCTION  
A8  
BYTE ADDRESS  
DATA BYTE  
1
A7 A6 A5 A4 A3 A2 A1 A0  
7
6
5
4
3
2
0
D
Q
HIGH IMPEDANCE  
AI01442  
Notes: A8 = A7 = 0 on ST95010; A8 = 0 on ST95020; A8 is only activeon ST95040.  
7/18  
ST95040, ST95020, ST95010  
Figure 9. Page Write Operation Sequence  
S
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23  
C
D
S
C
D
INSTRUCTION  
A8  
BYTE ADDRESS  
DATA BYTE 1  
1
A7 A6 A5 A4 A3 A2 A1 A0  
7
6
5
4
3
2
0
7
24 25 26 27 28 29 30 31 8+8N  
DATA BYTE 2  
DATA BYTE N  
DATA BYTE 16  
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
AI01443  
Notes: A8 = A7 = 0 on ST95010; A8 = 0 on ST95020; A8 is only activeon ST95040.  
Figure 10. RDSR:Read Status Register Sequence  
S
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15  
C
D
INSTRUCTION  
STATUS REG. OUT  
HIGH IMPEDANCE  
Q
7
6
5
4
3
2
1
0
MSB  
AI01444  
8/18  
ST95040, ST95020, ST95010  
Figure 11. WRSR: Write Status Register Sequence  
S
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15  
C
INSTRUCTION  
STATUS REG.  
D
Q
HIGH IMPEDANCE  
AI01445  
Byte Write Operation  
must reside on the same page. The page write  
mode is the same as the byte write mode except  
that instead of deselectingthe device after the first  
byteofdata, upto15additionalbytescanbeshifted  
in prior to deselecting the chip. A page address  
beginswith addressxxxx 0000 and ends with xxxx  
1111.If the addresscounterreaches xxxx 1111and  
the clock continues, the counter will roll over to the  
firstaddress of the page(xxxx0000) and overwrite  
any previously written data. The programming cy-  
cle will only start if the S transition occurs just after  
the eighth bit of data of a word is received.  
Prior to any write attempt, the write enable latch  
must be set by issuing the WREN instruction. First  
the device is selected(S = low)and a serial WREN  
instruction byte is issued. Then the product is de-  
selectedby taking S high. After the WREN instruc-  
tion byte is sent, the Memory will set the write  
enable latch and then remain in standby until it is  
deselected. Then the write state is entered by  
selecting the chip, issuing two bytes of instruction  
and address, and one byte of data.  
Chip Select (S) must remain low for the entire  
duration of the operation. The product must be  
deselectedjust afterthe eighthbitof datahasbeen  
latchedin. If not,the write process is cancelled.As  
soon as the product is deselected, the self-timed  
writecycleisinitiated. Whilethewrite isin progress,  
thestatusregistermay be readto checkBP1,BP0,  
WEL and WIP. WIP is high during the self-timed  
write cycle. When the cycle is completed,the write  
enable latch is reset.  
POWER ON STATE  
After a Power up the Memory is in the following  
state:  
– The device is in the low power standby state.  
– The chip is deselected.  
– The chip is not in hold condition.  
– The write enable latch is reset.  
Page Write Operation  
– BP1 and BP0 are unchanged (non-volatile  
bits).  
A maximum of 16 bytes of data may be written  
during one non-volatile write cycle. All 16 bytes  
9/18  
ST95040, ST95020, ST95010  
Figure 12. EEPROM and SPI Bus  
D
Q
C
MASTER  
C
Q
D
C
Q
D
C Q D  
ST95xxx  
ST95xxx  
ST95xxx  
CS3 CS2 CS1  
S
S
S
AI01446  
DATA PROTECTION AND PROTOCOL SAFETY  
– All inputs are protectedagainstnoise, see Table  
6.  
– Afterany of theoperationsWREN,WRDI,RDSR  
is completed, the chip enters a wait state and  
waits for a deselect.  
– The write enable latch is reset upon power-up.  
– Thewriteenablelatchis resetwhenWis brought  
low.  
– Non valid S and HOLD transitionsare not taken  
into account.  
– S must come high at the proper clock count in  
order to start a non-volatile write cycle (in the  
memory array or in the status register), that is  
theChipSelectSmustriseduringtheclockpulse  
following the introduction of a multiple of 8 bits.  
– Access to the memory array during non-volatile  
programmingcycleis ignored;however,the pro-  
gramming cycle continues.  
INITIAL DELIVERY STATE  
Thedevice is delivered with the memory array in a  
fully erased state (all data set at all ”1’s” or FFh).  
The block protect bits are initialized to 00.  
10/18  
ST95040, ST95020, ST95010  
Table 5. AC Measurement Conditions  
Figure 13. AC Testing Input Output Wavef.  
Input Rise and Fall Times  
Input Pulse Voltages  
50ns  
0.2VCC to 0.8VCC  
0.3VCC to 0.7VCC  
CL = 100pF  
0.8V  
CC  
0.7V  
CC  
Input and Output Timing  
Reference Voltages  
0.3V  
CC  
0.2V  
CC  
Output Load  
AI00825  
Note that Output Hi-Z is defined as the point where data is no  
longer driven.  
Table 6. Input Parameters (1) (TA = 25 °C, f = 2 MHz )  
Symbol  
CIN  
Parameter  
Input Capacitance (D)  
Min  
Max  
8
Unit  
pF  
CIN  
Input Capacitance (other pins)  
6
pF  
tLPF  
Input Signal Pulse Width Filtered Out  
10  
ns  
Note: 1. Sampled only, not 100% tested.  
Table 7. DC Characteristics  
(TA = 0 to 70°C, –40 to 85°C or –40 to 125°C; VCC = 4.5V to 5.5V or 2.5Vto 5.5V)  
Symbol  
ILI  
Parameter  
Input Leakage Current  
Output Leakage Current  
Test Condition  
Min  
Max  
Unit  
µA  
±2  
ILO  
2
±
A
µ
C = 0.1 VCC/0.9 VCC  
@ 2 MHz, Q = Open  
,
2
mA  
mA  
Supply Current  
C = 0.1 VCC/0.9 VCC  
@ 2 MHz, Q = Open, Note 2  
,
2
ICC  
C = 0.1 VCC/0.9 VCC  
@ 1 MHz, VCC = 2.5V,  
Q = Open  
,
Supply Current (W series)  
Standby Current  
1.5  
mA  
S = VCC, VIN = VSS or VCC  
50  
50  
µA  
µA  
S = VCC, VIN = VSS or VCC  
Note 2  
,
ICC1  
S = VCC, VIN = VSS or VCC  
,
Standby Current (W series)  
25  
µA  
V
CC = 2.5V  
VIL  
VIH  
Input Low Voltage  
Input High Voltage  
– 0.3  
0.3 VCC  
VCC + 1  
0.4  
V
V
V
V
V
V
V
V
0.7 VCC  
IOL = 2mA  
Output Low Voltage  
(1)  
VOL  
I
OL = 2mA, Note 2  
0.4  
Output Low Voltage (W series)  
Output High Voltage  
I
OL = 1.5mA, VCC = 2.5V  
0.4  
I
OH = –2mA  
IOH = –2mA, Note 2  
IOH = –0.4mA, VCC = 2.5V  
VCC –0.6  
VCC –0.6  
VCC –0.3  
(1)  
VOH  
Output High Voltage (W series)  
Notes: 1. The device meets output requirements for both TTL and CMOS standards.  
2. Test performed at –40 to 125°C temperature range, grade 3.  
11/18  
ST95040, ST95020, ST95010  
Table 8. AC Characteristics  
ST95040 / 020 / 010  
VCC = 4.5V to 5.5V,  
VCC = 4.5V to 5.5V,  
TA = 0 to 70 C,  
V
CC = 2.5V to 5.5V,  
TA = 0 to 70 C,  
Symbol  
Alt  
Parameter  
Unit  
°
°
TA = –40 to 125 C  
°
TA = –40 to 85 C  
TA = –40 to 85 C  
°
°
Min  
D.C.  
100  
Max  
Min  
D.C.  
100  
Max  
Min  
D.C.  
200  
Max  
fC  
fC  
Clock Frequency  
2
2
1
MHz  
ns  
tSLCH  
tCSS  
S Active Setup Time  
S Not Active Hold  
Time  
tCHSL  
100  
100  
200  
ns  
(1)  
tCH  
tCLH  
tCLL  
tRC  
tFC  
Clock High Time  
Clock Low Time  
Clock Rise Time  
Clock Fall Time  
190  
200  
200  
200  
400  
400  
ns  
ns  
(1)  
tCL  
tCLCH  
tCHCL  
tDVCH  
tCHDX  
tDLDH  
tDHDL  
tHHCH  
tHLCH  
tCLHL  
1
1
1
1
1
1
s
µ
µs  
ns  
ns  
tDSU  
tDH  
tRI  
Data In Setup Time  
Data In Hold Time  
Data In Rise Time  
Data In Fall Time  
HOLD Setup Time  
Clock Low Hold Time  
HOLD Hold Time  
50  
50  
50  
50  
100  
100  
1
1
1
1
1
1
s
s
µ
µ
tFI  
tHSU  
100  
90  
100  
90  
200  
200  
200  
ns  
ns  
ns  
tHH  
80  
80  
Clock Low Set-up  
Time  
tCLHH  
tCHSH  
tSHCH  
100  
200  
100  
200  
100  
200  
100  
200  
200  
200  
200  
200  
ns  
ns  
ns  
S Active Hold Time  
S Not Active Setup  
Time  
tSHSL  
tSHQZ  
tCSH  
tDIS  
S Deselect Time  
ns  
ns  
Output Disable Time  
150  
240  
150  
300  
200  
400  
Clock Low to Output  
Valid  
tCLQV  
tV  
ns  
tCLQX  
tHO  
tRO  
tFO  
Output Hold Time  
Output Rise Time  
Output Fall Time  
0
0
0
ns  
ns  
ns  
(2)  
tQLQH  
100  
100  
100  
100  
200  
200  
(2)  
tQHQL  
HOLD High to Output  
Low-Z  
tHHQX  
tLZ  
100  
100  
200  
ns  
HOLD Low to Output  
High-Z  
tHLQZ  
tW  
tHZ  
130  
10  
130  
10  
200  
10  
ns  
tWP  
Write Cycle Time  
ms  
Notes:  
1. tCH + tCL 1/fc  
2. Value guaranteed by characterization, not 100% tested in production.  
12/18  
ST95040, ST95020, ST95010  
Figure 14. Serial Input Timing  
tSHSL  
tSHCH  
tCHCL  
S
tCHSL  
tSLCH  
tCHSH  
C
tDVCH  
tCHDX  
tCLCH  
LSB IN  
MSB IN  
D
Q
tDLDH  
tDHDL  
HIGH IMPEDANCE  
AI01447  
Figure 15. Hold Timing  
S
C
tHLCH  
tCLHL  
tHHCH  
tCLHH  
tHHQX  
tHLQZ  
Q
D
HOLD  
AI01448  
13/18  
ST95040, ST95020, ST95010  
Figure 16. Output Timing  
S
C
tCH  
tCLQV  
tCL  
tSHQZ  
tCLQX  
LSB OUT  
Q
tQLQH  
tQHQL  
ADDR.LSB IN  
D
AI01449B  
14/18  
ST95040, ST95020, ST95010  
ORDERING INFORMATION SCHEME  
Example:  
ST95xx0  
W
M
6
TR  
Density  
Option  
04 4K (512 x 8)  
02 2K (256 x 8)  
01 1K (128 x 8)  
TR Tape & Reel  
Packing  
Data Strobe  
Operating Voltage  
Package  
Temperature Range  
0
Note 1  
blank 4.5V to 5.5V  
B
PSDIP8  
0.25 mm Frame  
1
6
0 to 70 C  
°
W
2.5V to 5.5V  
–40 to 85 °C  
M
SO8  
150mils Width  
3 (2) –40 to 125 °C  
Notes: 1. Data In is strobed on rising edge of the clock (C) and Data Out is synchronized from the falling edge of the clock.  
2. Temperature range on request only, 5V ± 10% only.  
Devices are shipped from the factorywith the memory content set at all ”1’s” (FFh).  
For a list of available options (Operating Voltage, Package, etc...) or for further information on any aspect  
of this device, please contact the STMicroelectronics Sales Office nearest to you.  
15/18  
ST95040, ST95020, ST95010  
PSDIP8 - 8 pin Plastic Skinny DIP, 0.25mm lead frame  
mm  
Min  
3.90  
0.49  
3.30  
0.36  
1.15  
0.20  
9.20  
inches  
Min  
Symb  
Typ  
Max  
5.90  
Typ  
Max  
0.232  
A
A1  
A2  
B
0.154  
0.019  
0.130  
0.014  
0.045  
0.008  
0.362  
5.30  
0.56  
1.65  
0.36  
9.90  
0.209  
0.022  
0.065  
0.014  
0.390  
B1  
C
D
E
E1  
e1  
eA  
eB  
L
7.62  
2.54  
0.300  
0.100  
6.00  
6.70  
0.236  
0.264  
7.80  
0.307  
10.00  
3.80  
0.394  
0.150  
3.00  
8
0.118  
8
N
CP  
0.10  
0.004  
A2  
A
L
A1  
e1  
B
C
eA  
eB  
B1  
D
N
1
E1  
E
PSDIP-a  
Drawing is not to scale  
16/18  
ST95040, ST95020, ST95010  
SO8 - 8 lead Plastic Small Outline, 150 mils body width  
mm  
Min  
1.35  
0.10  
0.33  
0.19  
4.80  
3.80  
inches  
Min  
Symb  
Typ  
Max  
1.75  
0.25  
0.51  
0.25  
5.00  
4.00  
Typ  
Max  
0.069  
0.010  
0.020  
0.010  
0.197  
0.157  
A
A1  
B
0.053  
0.004  
0.013  
0.007  
0.189  
0.150  
C
D
E
e
1.27  
0.050  
H
h
5.80  
0.25  
0.40  
6.20  
0.50  
0.90  
0.228  
0.010  
0.016  
0.244  
0.020  
0.035  
L
0
°
8
°
0
°
8
°
α
N
CP  
8
8
0.10  
0.004  
h x 45°  
A
C
B
CP  
e
D
N
1
E
H
A1  
α
L
SO-a  
Drawing is not to scale  
17/18  
ST95040, ST95020, ST95010  
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences  
of use of such informationnor for any infringementof patents or other rights of third parties which may result from its use. No licenseis granted  
by implication or otherwise under any patentor patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to  
change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not  
authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.  
The ST logo is a registered trademark of STMicroelectronics  
1998STMicroelectronics - All Rights Reserved  
STMicroelectronics GROUP OF COMPANIES  
Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands -  
Singapore - Spain - Sweden - Switzerland - Taiwan- Thailand - United Kingdom - U.S.A.  
18/18  

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