SAIFUN SA25C020LEMNFX, SA25C020LEMNX, SA25C020LEN, SA25C020LENF, SA25C020LENFX Datasheet

Features

•= Saifun NROM™ Cell

•= Serial Peripheral Interface (SPI) Compatible,

Supports SPI Modes 0 (0,0) and 3 (1,1)

•= Byte and Page Write Operation:

– 1024 pages (256 Bytes/Page)
– Single Byte or Page Write Cycle in 10ms Typical

•= Single Supply Voltage: 2.7V to 3.6V

•= 25MHz Clock Rate

•= Block Write Protection: Protect Quarter, Half or Entire Array

•= Write Protect Pin and Write Disable Instructions of Both

Hardware and Software Data Protection

•= 100,000 Erase Cycles (Minimum)

•= More than 20-Year Data Retention

•= Low-power Standby Current (less than 1µA)

•= 8-SOIC Narrow Package

•= MLF Leadless Package

•= Temperature Range:

– Industrial: -40°C to +85°C
– Commercial: 0°C to +70°C

SA25C020

Advanced

Information

2Mb EEPROM with

25MHz SPI Bus

Interface

http://www.saifun.com

Saifun NROMTM is a trademark of Saifun Semiconductors Ltd.

This Data Sheet states Saifun's current technical specifications regarding the Products described herei n. This Data
Sheet may be revised by subsequent versions or modifications due to changes in technical specifications.

Publication# 1911 Rev: 0 Amendment: 0
Issue Date: 20 July 2003

SA25C020 Advanced Information

SAIFUN

2

General Description

The SA25C020 is a 2Mb (512K X 4) CMOS
non-volatile serial EEPROM. This device
fully conforms to the SPI 4-wire protocol, is
enabled through the Chip Select (CSb) pin,
and uses Clock (SCK), Data-in (SI) and
Data-out (SO) pins to synchronously control
data transfer between the SPI
microcontroller and the Serial EEPROM.

The memory can be written from 1 up to
256 bytes at a time via the Byte / Page
Write (PW) instruction.

The memory consists of 1024 pages or
262,144 bytes.

Each device requires only a 3.0V power
supply (2.7 V to 3.6 V) for both read and
write functions. Internally generated and
regulated voltages are provided for the
program and erase operations. The
SA25C020 does not require a V

The HOLDb pin may be used to suspend
any serial communication without resetting
the serial sequence. In addition, the serial
interface allows a minimal-pin-count
packaging designed to simplify PC board
layout requirements and offers the designer
a variety of low-voltage and low-power
options.

supply.

PP

The SA25C020 is available in a
space-saving, 8-lead narrow SOIC package

The SA25C020 is part of the SPI EEPROM
family. It is designed to work with any SPI­compatible, high-speed microcontroller, and
offers both hardware (WPb pin) and
Software (“block protect”) data protection.
For example, programming a 2-bit code into
the status register prevents program with
top ¼, top ½ or entire array write protection
and enables block write protection.
Separate program enable and program
disable instructions are provided for
additional data protection. Hardware data
protection is provided via the WPb pin to
protect against inadvertent write attempts to
the status register.

Saifun’s SPI Serial EEPROM products are
designed and tested for applications
requiring high endurance and low power
consumption for a continuously reliable
non-volatile solution for all markets.

SA25C020 Advanced Information

SAIFUN

3

Table of Contents

Features........................................................................... 1

General Description ........................................................ 2

Memory Organization...................................................... 5

Connection Diagrams..................................................... 6

Ordering Information ...................................................... 7

Product Specifications ................................................... 8

Absolute Maximum Ratings....................................... 8

ESD/Latch Up Specification (JEDEC 8 Spec) ........... 8

Operating Conditions................................................. 8

DC Characteristics .......................................................... 9

AC Test Conditions ....................................................... 10

Timing Diagrams........................................................... 11

Signal Description......................................................... 13

Chip Select (CSb).................................................... 13

Serial Clock (SCK) .................................................. 13

Serial Input (SI) ....................................................... 13

Serial Output (SO)................................................... 13

Hold (HOLDb).......................................................... 13

Write Protect (WPb) ................................................ 13

Serial Interface Description.......................................... 14

SPI Modes............................................................... 14

Master ............................................................. 14

Slave ............................................................... 14

Transmitter/Receiver ....................................... 14

Serial Opcode.................................................. 14

Invalid Opcode ................................................ 14

Chip Select (CSb)............................................ 15

Hold Condition................................................. 15

Write Protect ................................................... 16

Functional Description ................................................. 17

Instructions.............................................................. 17

Read Status Register (RDSR)................................. 18

Write Enable (WREN) ............................................. 20

Write Disable (WRDI).............................................. 20

Write Status Register (WRSR)................................ 21

Read Data Bytes (READ)........................................ 23

Byte or Page Write (PW) ......................................... 24

Read Electronic Signature (Read_Id) ...................... 26

Powerup and Powerdown........................................ 27

Physical Dimensions..................................................... 28

Contact Information ...................................................... 31

Life Support Policy........................................................ 31

SA25C020 Advanced Information

SAIFUN

4

List of Figures

Figure 1. SA25C020 Block Diagram................................ 5

Figure 2. SOIC 8 (150 mil)/PDIP/MLF Package

(Top View)............................................................. 6

Figure 3. SA25C020 Ordering Information ...................... 7

Figure 4. SPI Mode 0 (0,0) Input Timing........................ 11

Figure 5. SPI Mode 0 (0,0) Output Timing..................... 11

Figure 6. AC Measurements I/O Waveform................... 12

Figure 7. Supported SPI Modes .................................... 14

Figure 8. Hold Condition................................................ 15

Figure 9. SPI Serial Interface ........................................ 17

Figure 10. Read Status Register (RDSR) Instruction

Sequence ............................................................ 19

Figure 11. Write Enable (WREN) Instruction Sequence 20

Figure 12. Write Disable (WRDI) Instruction Sequence. 20

Figure 13. Write Status Register (WRSR) Instruction

Sequence ............................................................ 22

Figure 14. Read (READ) Instruction Sequence ............. 23

Figure 16. Read Electronic Signature (Read Id) Instruction

Sequence ............................................................ 26

Figure 17. 8-pin SOIC Package..................................... 28

Figure 18. 8-pin MLF Leadless Package ....................... 29

Figure 19. Molded Dual-in-line Package (N) Package

Number N08E...................................................... 30

List of Tables

Table 1. Pin Names......................................................... 6

Table 2. DC Characteristics............................................. 9

Table 3. AC Test Conditions.......................................... 10

Table 4. AC Measurements........................................... 12

Table 5. Instruction Set ................................................. 17

Table 6. Status Register Format.................................... 17

Table 7. Read Status Register Definition....................... 18

Table 8. Block Write Protect Bits................................... 21

Table 9. WPBEN Operation .......................................... 21

Table 10. Powerup ........................................................ 27

Figure 15. Byte or Page Write (PW) Instruction

Sequence ............................................................ 25

SA25C020 Advanced Information

SAIFUN

5

Memory Organization

The memory is organized in the following
manner:

•= 262,144 bytes (8 bits each)

•= 1024 pages (256 bytes each)

Array - L

Logic

Each byte or page can be individually
written with the bits programmed from
1 to 0 and from 0 to 1.

PSSRAM

X
D
E
C

Array - R

DATA PATHRD

IO

SI

CSb

SCK

SO

Vcc

GND

Figure 1. SA25C020 Block Diagram

WPb

HOLDb

SA25C020 Advanced Information

SAIFUN

Connection Diagrams

6

CSb

SO

WPb

GND

1

2

SA25C020

3

4

VCC

8

HOLDb

7

SCK

6

SI

5

Figure 2. SOIC 8 (150 mil)/PDIP/MLF Package (Top View)

Table 1. Pin Names

Pin Name Signal Name

CSb Chip Select

SCK Serial Data Clock

SI Serial Data Input

SO Serial Data Output

GND Ground

VCC Power Supply

WPb Write Protect

HOLDb Suspend Serial Input

SA25C020 Advanced Information

SAIFUN

Ordering Information

7

FPPELXXC25SA Letter

Volt ag e Op er at in g

X

Package

Temp. Range

Range

Density

Interface

Blank
X

Blank
F

N
MN
MLF

Blank
E

L

020

C

25

SA

Description

Tube
Tape and Reel

Non Lead Fr ee
Lead Fr ee

8-pi n D IP
8-pi n SOIC ( 150 mil )
8-lead M LF

0 to 70 C

-40 to +85 C

2.7 V to 3.6 V

2 Mb with Wri te Pr otect

CMOS

SPI-2 Wir es

Saifun Non-Volatile
Memory

o

o

Figure 3. SA25C020 Ordering Information

SA25C020 Advanced Information

SAIFUN

Product Specifications

Absolute Maximum Ratings

8

Storage Temperature

All input or output voltages with
respect to Ground

Lead Temperature
(Soldering, 10 seconds)

-65 °C to +150 °C

4.5 V to -0.3 V

+235 °C

ESD/Latch Up Specification (JEDEC 8 Spec)

Human Body Model Minimum 4 KV

Machine Model Minimum 500 V

Charge Device Model Minimum 1 KV

Latch Up

100 mA on all pins +125°C

Operating Conditions

Operating Temperature:
SA25C020
SA25C020 E

Positive Power Supply:
SA25C020

0 °C to +70 °C

-40 °C to +85 °C

2.7 V to 3.6 V

SA25C020 Advanced Information

SAIFUN

DC Characteristics

Applicable over recommended operating range from TAI = -40 ºC to 85 ºC, VCC = 2.7-3.6 V.

Table 2. DC Characteristics

9

Symbol Parameter Test Conditions

Limits

Min Typ* Max

VCC Supply Voltage 2.7 3 3.6

Active Power Supply

I

CC1

Current (Read)

Active Power Supply

I

CC2

Current (Page Write)

Active Power Supply

I

CC3

Current (WRSR)

ISB Standby Current

IIL Input Leakage Current V

IOL Output Leakage Current V

SCK = 0.1VCC/0.9 VCC @
25 MHz

9 12

CSb = VCC 15 mA

CSb = VCC 15 mA

= 3.6 V,

V

CC

CSb = V

IN

IN

CC

= GND to VCC 1

= GND to VCC 1

1

VIL Input Low Voltage -0.3 0.3 VCC

VIH Input High Voltage 0.7 V

VOH Output High Voltage IOH = -0.1 mA

VCC -

0.2

CC

VCC +

0.5

Unit

V

mA

µA

µA
µA

V

V

V

VOL Output Low Voltage IOL = 1.6 mA; VCC = 2.7 V 0.4

*Typical values are at TAI = 25 ºC and 3 V.

V

SA25C020 Advanced Information

SAIFUN

AC Test Conditions

Table 3. AC Test Conditions

10

Symbol Parameter

F

SCK Clock Frequency D.C. 25 MHz

SCK

t

t

t

t

CRT

CFT

WH

WL

Clock Rise Time (Slew Rate) 0.1

Clock Fall Time (Slew Rate) 0.1

SCK High Time 18

SCK Low Time 18 ns

Min Typ Max

tCS CSb High Time 100 ns

**

t

t

t

t

CSS

CSH

HD

CD

**

**

CSb Setup Time 10 ns

**

CSb HOLD Time 10 ns

HOLDb Setup Time 10 ns

HOLDb Hold Time 10 ns

tV Output Valid 0 15 ns

tHO Output Hold Time 0 ns

t

Data in Hold Time 5 ns

HD:DAT

t

Data in Setup Time 5 ns

SU:DAT

**

t

t

t

DIS

t

WPS

t

WPH

LZ

HZ

HOLDb to Output Low Z 15 ns

**

HOLDb to Output High Z 20 ns

**

Output Disable Time 15 ns

**

Write Protect Setup Time 20 ns

**

Write Protect Hold Time 100 ns

tPW* Byte or Page Write 10 15 ms

t

Release SP Mode 1000 ns

RES

Endurance 100K Erase cycles

* 256 bytes in the checkerboard programming formation.

** Value guaranteed by characterization, not 100% tested in production

25 MHz

Unit

V/ns

V/ns

ns