25AA640A,25AA640A pdf中文资料,25AA640A引脚图,25AA640A电路-Datasheet-电子工程世界

文档预览

25AA640A/25LC640A

64K SPI Bus Serial EEPROM

Device Selection Table

Part Number

25LC640A

25AA640A

Range

2.5-5.5V

1.8-5.5V

Page Size

32 Byte

Temp. Ranges

I,E

I, E

Packages

P, SN, ST, MS, MF, MNY

Features:

• Max. Clock 10 MHz

• Low-Power CMOS Technology:

- Max. Write Current: 5 mA at 5.5V, 10 MHz

- Read Current: 5 mA at 5.5V, 10 MHz

- Standby Current: 1

A

at 5.5V

• 8192 x 8-bit Organization

• 32 Byte Page

• Self-Timed Erase and Write Cycles (5 ms max.)

• 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: 1,000,000 erase/write cycles

- Data retention: > 200 years

- ESD protection: > 4000V

• Temperature Ranges Supported:

- Industrial (I):

-40C to +85C

- Automotive (E):

-40°C to +125°C

Description:

The Microchip Technology Inc. 25AA640A/25LC640A

(25XX640A

) are 64 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.

The 25XX640A is available in standard packages

including 8-lead PDIP and SOIC, and advanced

packaging including 8-lead MSOP, 8-lead TSSOP, DFN

and TDFN.

Package Types (not to scale)

TSSOP/MSOP

(ST, MS)

HOLD

SCK

PDIP/SOIC

(P, SN)

HOLD

SCK

X-Rotated TSSOP

(X/ST)

HOLD

SCK

DFN/TDFN

(MF/MNY)

HOLD

SCK

* 25XX640A is used in this document as a generic part number

for the 25AA640A, 25LC640A devices.



2003-2013 Microchip Technology Inc.

DS21830F-page 1

25AA640A/25LC640A

1.0

ELECTRICAL CHARACTERISTICS

Absolute Maximum Ratings

(†)

.............................................................................................................................................................................6.5V

All inputs and outputs w.r.t. V

......................................................................................................... -0.6V to V

+1.0V

Storage temperature .................................................................................................................................-65°C to 150°C

Ambient temperature under bias ...............................................................................................................-40°C to 125°C

ESD protection on all pins ..........................................................................................................................................4 kV

†

NOTICE: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the

device. This is a stress rating only and functional operation of the device at those or any other conditions above those

indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for an

extended period of time may affect device reliability.

TABLE 1-1:

DC CHARACTERISTICS

Industrial (I):

= -40°C to +85°C

Automotive (E): T

= -40°C to +125°C

Min.

0.7 V

-0.3

—

-0.5

—

Max.

0.3 V

0.2 V

0.4

0.2

—

±1

Units

A

2.7V

< 2.7V

= 2.1 mA

= 1.0 mA, V

< 2.5V

= -400

A

CS = V

, V

= V

or V

CS = V

, V

OUT

= V

or V

= 25°C, CLK = 1.0 MHz,

= 5.0V

(Note)

= 5.5V; F

CLK

= 10.0 MHz;

SO = Open

= 2.5V; F

CLK

= 5.0 MHz;

SO = Open

= 5.5V

= 2.5V

CS = V

= 5.5V, Inputs tied to V

, 125°C

CS = V

= 5.5V, Inputs tied to V

, 85°C

= 1.8V to 5.5V

Test Conditions

DC CHARACTERISTICS

Param.

No.

D001

D002

D003

D004

D005

D006

D007

D008

D009

Sym.

IH1

IL1

IL2

INT

Characteristic

High-level input

voltage

Low-level input

voltage

Low-level output

voltage

High-level output

voltage

Input leakage current

Output leakage

current

Internal Capacitance

(all inputs and

outputs)

D010

Read

Operating Current

—

2.5

A

D011

D012

Write

CCS

Standby Current

—

Note:

This parameter is periodically sampled and not 100% tested.

DS21830F-page 2



2003-2013 Microchip Technology Inc.

25AA640A/25LC640A

TABLE 1-2:

AC CHARACTERISTICS

Industrial (I):

= -40°C to +85°C

Automotive (E): T

= -40°C to +125°C

Min.

—

100

150

100

200

250

—

100

150

100

150

—

Max.

—

100

—

100

160

—

160

—

Units

MHz

= 1.8V to 5.5V

Test Conditions

4.5V

Vcc 

5.5V

2.5V

Vcc 

4.5V

1.8V

Vcc 

2.5V

4.5V

Vcc 

5.5V

2.5V

Vcc 

4.5V

1.8V

Vcc 

2.5V

4.5V

Vcc 

5.5V

2.5V

Vcc 

4.5V

1.8V

Vcc 

2.5V

—

4.5V

Vcc 

5.5V

2.5V

Vcc 

4.5V

1.8V

Vcc 

2.5V

4.5V

Vcc 

5.5V

2.5V

Vcc 

4.5V

1.8V

Vcc 

2.5V

(Note

4.5V

Vcc 

5.5V

2.5V

Vcc 

4.5V

1.8V

Vcc 

2.5V

4.5V

Vcc 

5.5V

2.5V

Vcc 

4.5V

1.8V

Vcc 

2.5V

—

4.5V

Vcc 

5.5V

2.5V

Vcc 

4.5V

1.8V

Vcc 

2.5V

(Note

4.5V

Vcc 

5.5V

(Note

2.5V

Vcc 

4.5V

(Note

1.8V

Vcc 

2.5V

(Note

4.5V

Vcc 

5.5V

2.5V

Vcc 

4.5V

1.8V

Vcc 

2.5V

AC CHARACTERISTICS

Param.

Sym.

No.

CLK

Characteristic

Clock frequency

CSS

CS setup time

CSH

CS hold time

CSD

Tsu

CS disable time

Data setup time

Data hold time

CLK rise time

CLK fall time

Clock high time

Clock low time

CLD

CLE

Clock delay time

Clock enable time

Output valid from clock

low

Output hold time

Output disable time

DIS

HOLD setup time

Note 1:

This parameter is periodically sampled and not 100% tested.

This parameter is not tested but ensured by characterization. For endurance estimates in a specific

application, please consult the Total Endurance™ Model which can be obtained from Microchip’s web site

at www.microchip.com.

begins on the rising edge of CS after a valid write sequence and ends when the internal write cycle

is complete.



2003-2013 Microchip Technology Inc.

DS21830F-page 3

25AA640A/25LC640A

TABLE 1-2:

AC CHARACTERISTICS (CONTINUED)

Industrial (I):

= -40°C to +85°C

Automotive (E): T

= -40°C to +125°C

Min.

160

—

Max.

—

Units

= 1.8V to 5.5V

Test Conditions

4.5V

Vcc 

5.5V

2.5V

Vcc 

4.5V

1.8V

Vcc 

2.5V

4.5V

Vcc 

5.5V

(Note

2.5V

Vcc 

4.5V

(Note

1.8V

Vcc 

2.5V

(Note

4.5V

Vcc 

5.5V

2.5V

Vcc 

4.5V

1.8V

Vcc 

2.5V

(Note

AC CHARACTERISTICS

Param.

Sym.

No.

Characteristic

HOLD hold time

HOLD low to output

High-Z

HOLD high to output valid

—

Internal write cycle time

Endurance

E/W 25°C, V

= 5.5V

(Note

Cycles

Note 1:

This parameter is periodically sampled and not 100% tested.

This parameter is not tested but ensured by characterization. For endurance estimates in a specific

application, please consult the Total Endurance™ Model which can be obtained from Microchip’s web site

at www.microchip.com.

begins on the rising edge of CS after a valid write sequence and ends when the internal write cycle

is complete.

TABLE 1-3:

AC Waveform:

= 0.2V

AC TEST CONDITIONS

—

(Note

—

0.5 V

= V

- 0.2V

= 4.0V

= 100 pF

Timing Measurement Reference Level

Input

Output

Note 1:

For V



4.0V.

For V

> 4.0V.

DS21830F-page 4



2003-2013 Microchip Technology Inc.

25AA640A/25LC640A

FIGURE 1-1:

SCK

n+2

n+1

High-Impedance

n-1

HOLD TIMING

Don’t Care

HOLD

n+2

n+1

FIGURE 1-2:

SERIAL INPUT TIMING

Mode

1,1

SCK Mode

0,0

LSB in

MSB in

High-Impedance

FIGURE 1-3:

SERIAL OUTPUT TIMING

SCK

MSB out

Don’t Care

ISB out

Mode

1,1

Mode

0,0



2003-2013 Microchip Technology Inc.

DS21830F-page 5