Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsIntegrated Circuits (ICs)SOIC 8 8 kBit 1 K x 8

 1997-2012 Microchip Technology Inc. DS21230E-page 1

25AA080/25LC080/25C080

Device Selection Table

Features:

• Low-power CMOS technology:

- Write current: 3 mA maximum

- Read current: 500 A typical

- Standby current: 500 nA typical

• 1024 x 8-bit organization

• 16 byte page

• Write cycle time: 5 ms max.

• Self-timed erase and write cycles

• Block write protection:

- Protect none, 1/4, 1/2 or all of array

• Built-in write protection:

- Power-on/off data protection circuitry

- Write enable latch

- Write-protect pin

• Sequential read

• High reliability:

- Endurance: 1 M cycles

- Data retention: > 200 years

- ESD protection: > 4000V

• 8-pin PDIP and SOIC (150 mil)

• Temperature ranges supported:

Description:

The Microchip Technology Inc. 25AA080/25LC080/

25C080 (25XX080

) are 8 Kbit Serial Electrically

Erasable PROMs. The memory is accessed via a

simple Serial Peripheral Interface (SPI) compatible

serial bus. The bus signals required are a clock input

(SCK) plus separate data in (SI) and data out (SO)

lines. Access to the device is controlled through a Chip

Select (CS

) input.

Communication to the device can be paused via the

hold pin (HOLD

). While the device is paused, transi-

tions on its inputs will be ignored, with the exception of

chip select, allowing the host to service higher priority

interrupts.

Package Types

Block Diagram

Part

Number

VCC

Range

Max. Clock

Frequency

Temp.

Ranges

25AA080 1.8-5.5V 1 MHz I

25LC080 2.5-5.5V 2 MHz I

25C080 4.5-5.5V 3 MHz I,E

- Industrial (I): -40Cto +85C

- Automotive (E) (25C080): -40°C to +125°C

VSS

VCC

HOLD

SCK

25AA080/

PDIP/SOIC

SCK

HOLD

Status

I/O Control

Memory

Control

Logic

Dec

HV Generator

EEPROM

Array

Page Latches

Y Decoder

Sense Amp.

R/W Control

Logic

VCC

VSS

8K SPI Bus Serial EEPROM

Not recommended for new designs –

Please use 25AA080A/B or 25LC080A/B.

Summary of content (22 pages)

PAGE 1
Not recommended for new designs – Please use 25AA080A/B or 25LC080A/B. 25AA080/25LC080/25C080 8K SPI Bus Serial EEPROM Device Selection Table Part Number 25AA080 Description: VCC Range Max. Clock Frequency Temp. Ranges 1.8-5.5V 1 MHz I 25LC080 2.5-5.5V 2 MHz I 25C080 4.5-5.5V 3 MHz I,E Features: Communication to the device can be paused via the hold pin (HOLD).
PAGE 2
5AA080/25LC080/25C080 1.0 ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings(†) VCC .............................................................................................................................................................................7.0V All inputs and outputs w.r.t. VSS ........................................................................................................ -0.6V to VCC + 1.0V Storage temperature ...................................................................
PAGE 3
25AA080/25LC080/25C080 1.2 AC Characteristics Industrial (I): TA = -40°C to +85°C Automotive (E): TA = -40°C to +125°C AC CHARACTERISTICS Param. No. Sym. Characteristic VCC = 1.8V to 5.5V VCC = 4.5V to 5.5V (25C080 only) Min. Max. Units Test Conditions — — — 3 2 1 MHz MHz MHz VCC = 4.5V to 5.5V VCC = 2.5V to 4.5V VCC = 1.8V to 2.5V 1 FCLK Clock Frequency 2 TCSS CS Setup Time 100 250 500 — — — ns ns ns VCC = 4.5V to 5.5V VCC = 2.5V to 4.5V VCC = 1.8V to 2.
PAGE 4
25AA080/25LC080/25C080 FIGURE 1-1: HOLD TIMING CS 17 16 17 16 SCK 18 SO n+2 SI n+2 n+1 n 19 High-impedance n 5 don’t care n+1 n-1 n n n-1 HOLD FIGURE 1-2: SERIAL INPUT TIMING 4 CS 2 7 Mode 1,1 12 11 8 3 SCK Mode 0,0 5 SI 6 MSB in LSB in High-impedance SO FIGURE 1-3: SERIAL OUTPUT TIMING CS 9 3 10 Mode 1,1 SCK Mode 0,0 13 14 SO SI DS21230E-page 4 MSB out 15 ISB out don’t care  1997-2012 Microchip Technology Inc.
PAGE 5
25AA080/25LC080/25C080 1.3 FIGURE 1-4: AC Test Conditions AC TEST CIRCUIT VCC AC Waveform: VLO = 0.2V — VHI = VCC - 0.2V (Note 1) VHI = 4.0V (Note 2) Timing Measurement Reference Level 2.25 K SO Input 0.5 VCC Output 0.5 VCC 1.8 K 100 pF Note 1: For VCC  4.0V 2: For VCC > 4.0V  1997-2012 Microchip Technology Inc.
PAGE 6
25AA080/25LC080/25C080 2.0 PIN DESCRIPTIONS 2.4 The descriptions of the pins are listed in Table 2-1. TABLE 2-1: PIN FUNCTION TABLE Name PDIP SOIC Function CS 1 1 Chip Select Input SO 2 2 Serial Data Output WP 3 3 Write-Protect Pin Vss 4 4 Ground SI 5 5 Serial Data Input SCK 6 6 Serial Clock Input HOLD 7 7 Hold Input Vcc 8 8 Supply Voltage 2.1 Chip Select (CS) A low level on this pin selects the device.
PAGE 7
25AA080/25LC080/25C080 3.0 FUNCTIONAL DESCRIPTION 3.1 Principles of Operation 3.3 The 25XX080 are 1024 byte Serial EEPROMs designed to interface directly with the Serial Peripheral Interface (SPI) port of many of today’s popular microcontroller families, including Microchip’s PIC16C6X/7X microcontrollers. It may also interface with microcontrollers that do not have a built-in SPI port by using discrete I/O lines programmed properly with the software. The 25XX080 contains an 8-bit instruction register.
PAGE 8
25AA080/25LC080/25C080 FIGURE 3-1: READ SEQUENCE CS 0 1 2 3 4 5 6 7 8 9 10 11 21 22 23 24 25 26 27 28 29 30 31 SCK instruction 0 SI 0 0 0 0 16-bit address 0 1 15 14 13 12 1 2 1 0 data out High-impedance 7 SO FIGURE 3-2: 6 5 4 3 2 1 0 BYTE WRITE SEQUENCE CS Twc 0 1 2 0 0 0 3 4 5 6 7 8 9 10 11 0 1 0 15 14 13 12 21 22 23 24 25 26 27 28 29 30 31 SCK instruction SI 0 0 16-bit address data byte 2 1 0 7 6 5 4 3 2 1 0 High-impedance SO FIGURE 3-3:
PAGE 9
25AA080/25LC080/25C080 3.4 Write Enable (WREN) and Write Disable (WRDI) The following is a list of conditions under which the write enable latch will be reset: • • • • The 25XX080 contains a write enable latch. See Table 3-3 for the Write-Protect Functionality Matrix. This latch must be set before any write operation will be completed internally. The WREN instruction will set the latch, and the WRDI will reset the latch.
PAGE 10
25AA080/25LC080/25C080 3.5 Read Status Register (RDSR) The Write Enable Latch (WEL) bit indicates the status of the write enable latch. When set to a ‘1’, the latch allows writes to the array, when set to a ‘0’, the latch prohibits writes to the array. The state of this bit can always be updated via the WREN or WRDI commands regardless of the state of write protection on the Status register. This bit is read only. The Read Status Register (RDSR) instruction provides access to the Status register.
PAGE 11
25AA080/25LC080/25C080 Write Status Register (WRSR) TABLE 3-2: The Write Status Register (WRSR) instruction allows the user to select one of four levels of protection for the array by writing to the appropriate bits in the Status register. The array is divided up into four segments. The user has the ability to write-protect none, one, two, or all four of the segments of the array. The partitioning is controlled as shown in Table 3-2.
PAGE 12
25AA080/25LC080/25C080 3.7 Data Protection 3.
PAGE 13
25AA080/25LC080/25C080 4.0 PACKAGING INFORMATION 4.1 Package Marking Information 8-Lead PDIP (300 mil) Example: XXXXXXXX XXXXXNNN YYWW 25LC080 /PNNN YYWW 8-Lead SOIC (150 mil) 25LC080 /SNYYWW NNN XXXXXXXX XXXXYYWW NNN Legend: Note: XX...
PAGE 14
25AA080/25LC080/25C080 8-Lead Plastic Dual In-line (P) – 300 mil (PDIP) Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.
PAGE 15
25AA080/25LC080/25C080 8-Lead Plastic Small Outline (SN) – Narrow, 150 mil (SOIC) Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.
PAGE 16
25AA080/25LC080/25C080 APPENDIX A: REVISION HISTORY Revision D Added note to page 1 header (Not recommended for new designs). Updated document format. Revision E Added a note to each package outline drawing. DS21230E-page 16  1997-2012 Microchip Technology Inc.
PAGE 17
25AA080/25LC080/25C080 THE MICROCHIP WEB SITE CUSTOMER SUPPORT Microchip provides online support via our WWW site at www.microchip.com. This web site is used as a means to make files and information easily available to customers.
PAGE 18
25AA080/25LC080/25C080 READER RESPONSE It is our intention to provide you with the best documentation possible to ensure successful use of your Microchip product. 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.
PAGE 19
25AA080/25LC080/25C080 PRODUCT IDENTIFICATION SYSTEM To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office. PART NO. X /XX XXX Device Temperature Range Package Pattern Device 25AA080: 8 Kbit 1.8V SPI Serial EEPROM 25AA080T: 8 Kbit 1.8V SPI Serial EEPROM (Tape and Reel) 25LC080: 8 Kbit 2.5V SPI Serial EEPROM 25LC080: 8 Kbit 2.5V SPI Serial EEPROM (Tape and Reel) 25C080: 8 Kbit 5.0V SPI Serial EEPROM 25C080: 8 Kbit 5.
PAGE 20
25AA080/25LC080/25C080 NOTES: DS21230E-page 20  1997-2012 Microchip Technology Inc.
PAGE 21
Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature.
PAGE 22
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