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PDF 93AA86-SN Data sheet ( Hoja de datos )
| Número de pieza | 93AA86-SN | |
| Descripción | 8K/16K 1.8V Microwire Serial EEPROM | |
| Fabricantes | Microchip Technology | |
| Logotipo |  |
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93AA76/86
8K/16K 1.8V Microwire® Serial EEPROM
FEATURES
• Single supply operation down to 1.8V
• Low power CMOS technology
- 1 mA active current typical
- 5 µA standby current (typical) at 3.0V
• ORG pin selectable memory configuration
- 1024 x 8 or 512 x 16-bit organization
(93AA76)
- 2048 x 8 or 1024 x 16-bit organization
(93AA86)
• Self-timed ERASE and WRITE cycles
• 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
• 10,000,000 ERASE/WRITE cycles guaranteed
• Data retention > 200 years
• 8-pin PDIP/SOIC package
• Temperature ranges available:
- Commercial (C): 0°C to +70°C
DESCRIPTION
The Microchip Technology Inc. 93AA76/86 are 8K and
16K low voltage serial Electrically Erasable PROMs.
The device memory is configured as x8 or x16 bits
depending on the ORG pin setup. Advanced CMOS
technology makes these devices ideal for low power
non-volatile memory applications. These devices also
have a Program Enable (PE) pin to allow the user to
write protect the entire contents of the memory array.
The 93AA76/86 is available in standard 8-pin DIP and
8-pin surface mount SOIC packages.
PACKAGE TYPES
DIP Package
CS 1
CLK 2
DI 3
DO 4
8 VCC
7 PE
6 ORG
5 VSS
SOIC Package
CS 1
CLK 2
DI 3
DO 4
8 VCC
7 PE
6 ORG
5 VSS
BLOCK DIAGRAM
VCC VSS
Memory
Array
Address
Decoder
Data
Register
DI
Mode
PE
CS
Decode
Logic
CLK
Clock
Generator
Address
Counter
Output
Buffer
DO
Microwire is a registered trademark of National Semiconductor Incorporated.
© 1996 Microchip Technology Inc.
Preliminary
This document was created with FrameMaker 4 0 4
DS21130C-page 1
1 page  
2.0 PRINCIPLES OF OPERATION
When the ORG pin is connected to VCC, the x16 orga-
nization is selected. When it is connected to ground, the
x8 organization is selected. Instructions, addresses
and write data are clocked into the DI pin on the rising
edge of the clock (CLK). The DO pin is normally held in
a high-Z state except when reading data from the
device, or when checking the READY/BUSY status dur-
ing a programming operation. The READY/BUSY sta-
tus can be verified during an Erase/Write operation by
polling the DO pin; DO low indicates that programming
is still in progress, while DO high indicates the device is
ready. The DO will enter the high impedance state on
the falling edge of the CS.
2.1 START Condition
The START bit is detected by the device if CS and DI
are both HIGH with respect to the positive edge of CLK
for the first time.
Before a START condition is detected, CS, CLK, and DI
may change in any combination (except to that of a
START condition), without resulting in any device oper-
ation (READ, WRITE, ERASE, EWEN, EWDS, ERAL,
and WRAL). As soon as CS is HIGH, the device is no
longer in the standby mode.
An instruction following a START condition will only be
executed if the required amount of opcode, address
and data bits for any particular instruction are clocked
in.
After execution of an instruction (i.e., clock in or out of
the last required address or data bit) CLK and DI
become don't care bits until a new start condition is
detected.
2.2 DI/DO
It is possible to connect the Data In and Data Out pins
together. However, with this configuration it is possible
for a “bus conflict” to occur during the “dummy zero” that
precedes the READ operation, if A0 is a logic HIGH
level. Under such a condition the voltage level seen at
Data Out is undefined and will depend upon the relative
impedances of Data Out and the signal source driving
A0. The higher the current sourcing capability of A0, the
higher the voltage at the Data Out pin.
93AA76/86
2.3 Erase/Write Enable and Disable
(EWEN, EWDS)
The 93AA76/86 powers up in the Erase/Write Disable
(EWDS) state. All programming modes must be pre-
ceded 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 disturb, the EWDS instruction can be
used to disable all Erase/Write functions and should fol-
low all programming operations. Execution of a READ
instruction is independent of both the EWEN and
EWDS instructions.
2.4 Data Protection
During power-up, all programming modes of operation
are inhibited until VCC has reached a level greater than
1.4V. During power-down, the source data protection
circuitry acts to inhibit all programming modes when
VCC has fallen below 1.4V.
The EWEN and EWDS commands give additional pro-
tection against accidentally programming during nor-
mal operation.
After power-up, the device is automatically in the
EWDS mode. Therefore, an EWEN instruction must be
performed before any ERASE or WRITE instruction can
be executed.
© 1996 Microchip Technology Inc.
Preliminary
DS21130C-page 5
5 Page 
93AA76/86
93AA76/86 Product Identification System
To order or to obtain information, e.g., on pricing or delivery, please use the listed part numbers, and refer to the factory or the listed
sales offices.
93AA76/86 –
/P
Package:
P = PDIP
SN = Plastic SOIC (150) mil Body), 8-lead
Temperature
Range:
Blank = 0˚C to +70˚C
Device:
93AA76/86 Microwire Serial EEPROM
93AA76/86T Microwire Serial EEPROM (Tape and Reel)
Sales and Support
Products supported by a preliminary Data Sheet may possibly have an errata sheet describing minor operational differences and
recommended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following:
1. Your local Microchip sales office (see below)
2. The Microchip Corporate Literature Center U.S. FAX: (602) 786-7277
3. The Microchip’s Bulletin Board, via your local CompuServe number (CompuServe membership NOT required).
Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using.
For latest version information and upgrade kits for Microchip Development Tools, please call 1-800-755-2345 or 1-602-786-7302.
DS21130C-page 11
Preliminary
© 1996 Microchip Technology Inc.
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet 93AA86-SN.PDF ] | |
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