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PDF ( 数据手册 , 数据表 ) 93AA46

零件编号 93AA46
描述 1K Microwire Serial EEPROM
制造商 Microchip Technology
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93AA46 数据手册, 描述, 功能
93AA46, 93LC46, 93C46
93AA46A/B, 93LC46A/B, 93C46A/B
1K Microwire® Serial EEPROM
Device Selection Table
Part
Number
93AA46
93LC46
93C46
93AA46A
93AA46B
93LC46A
93LC46B
93C46A
93C46B
VCC
Range
1.8-5.5
2.5-5.5
4.5-5.5
1.8-5.5
1.8-5-5
2.5-5.5
2.5-5.5
4.5-5.5
4.5-5.5
Org Pin Word Size
Temp
Ranges
Yes 8 or 16-bit
I
Yes 8 or 16-bit I, E
Yes 8 or 16-bit I, E
No 8-bit
I
No 16-bit
I
No 8-bit
I, E
No 16-bit
I, E
No 8-bit
I, E
No 16-bit
I, E
Features
• Low power CMOS technology
• ORG pin for selectable memory configuration
• No org pin for dedicated word sizes
- 128 x 8-bit organization ‘A’ version devices
- 64 x 16-bit organization ‘B’ version devices
• Self-timed ERASE and WRITE cycles (including
auto-erase)
• Automatic ERAL before WRAL
• Power on/off data protection circuitry
• Industry standard 3-wire serial I/O
• Device status signal during ERASE/WRITE cycles
• Sequential READ function
• 1,000,000 E/W cycles
• Data retention > 200 years
• 8-pin MSOP and 6-pin SOT
• Temperature ranges supported:
- Industrial (I):
-40°C to +85°C
- Automotive (E)
-40°C to +125°C
Package Types
MSOP
CS
CLK
DI
DO
1
2
3
4
8 VCC
7 NU
6 ORG*
5 VSS
* Org pin is not available on A/B devices
Description
The Microchip Technology Inc. 93AA46, 93LC46,
93C46, 93AA46A/B, 93LC46A/B & 93C46A/B are 1K
low voltage serial Electrically Erasable PROMs
(EEPROM). Generic memory devices such as the
93AA46, 93LC46 or 93C46 are dependent upon exter-
nal logic levels driving the ORG pin to set word size.
For dedicated 8-bit communication, the 93AA46A,
93LC46A or 93C46A devices are selected, while the
93AA46B, 93LC46B and 93C46B devices are selected
for 16 bits. Advanced CMOS technology makes these
devices ideal for low power, non-volatile memory
applications. This 93XX Series is available in standard
8-lead MSOP and 6-lead SOT-23 packages.
Block Diagram
VCC VSS
MEMORY
ARRAY
ADDRESS
DECODER
DI
ORG*
CS
DATA REGISTER
MODE
DECODE
LOGIC
ADDRESS
COUNTER
OUTPUT
BUFFER
DO
CLK
CLOCK
REGISTER
* Org input is not available on A/B devices
SOT-23**
DO 1
VSS 2
DI 3
6 VCC
5 CS
4 CLK
** SOT-23 device only offered in A/B versions
2002 Microchip Technology Inc.
DS21749A-page 1







93AA46 pdf, 数据表
93XX46, 93XX46A/B
2.6 ERASE/WRITE DISABLE AND ENABLE (EWDS/EWEN)
The 93XX46, 93XX46A/B powers up in the ERASE/
WRITE Disable (EWDS) state. All programming modes
must be preceded by an ERASE/WRITE Enable
(EWEN) instruction. Once the EWEN instruction is
executed, programming remains enabled until an EWDS
instruction is executed or Vcc is removed from the
device. To protect against accidental data disturbance,
the EWDS instruction can be used to disable all ERASE/
WRITE functions and should follow all programming
operations. Execution of a READ instruction is indepen-
dent of both the EWEN and EWDS instructions.
FIGURE 2-5: EWDS TIMING
CS
TCSL
CLK
DI
1 00
00
X
•••
X
FIGURE 2-6: EWEN TIMING
CS
TCSL
CLK
DI
1
00
1
1X
2.7 READ
The READ instruction outputs the serial data of the
addressed memory location on the DO pin. A dummy
zero bit precedes the 8-bit (If ORG pin is low or A-Ver-
sion devices) or 16-bit (If ORG pin is high or B-version
devices) output string. The output data bits will toggle
FIGURE 2-7: READ TIMING
CS
••• X
on the rising edge of the CLK and are stable after the
specified time delay (TPD). Sequential read is possible
when CS is held high. The memory data will automati-
cally cycle to the next register and output sequentially.
CLK
DI
DO
1 1 0 An ••• A0
HIGH-Z
0 Dx ••• D0 Dx ••• D0 Dx ••• D0
DS21749A-page 8
2002 Microchip Technology Inc.







93AA46 equivalent, schematic
93XX46, 93XX46A/B
READER RESPONSE
It is our intention to provide you with the best documentation possible to ensure successful use of your Microchip prod-
uct. If you wish to provide your comments on organization, clarity, subject matter, and ways in which our documentation
can better serve you, please FAX your comments to the Technical Publications Manager at (480) 792-4150.
Please list the following information, and use this outline to provide us with your comments about this document.
To: Technical Publications Manager
RE: Reader Response
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Application (optional):
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FAX: (______) _________ - _________
Device: 93XX46, 93XX46A/B
Literature Number: DS21749A
Questions:
1. What are the best features of this document?
2. How does this document meet your hardware and software development needs?
3. Do you find the organization of this document easy to follow? If not, why?
4. What additions to the document do you think would enhance the structure and subject?
5. What deletions from the document could be made without affecting the overall usefulness?
6. Is there any incorrect or misleading information (what and where)?
7. How would you improve this document?
DS21749A-page 20
2002 Microchip Technology Inc.










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