Features
•Serial Peripheral Interface (SPI) Compatible
•Supports SPI Modes 0(0,0) and 3(1,1)
•Low-Voltage and Standard-Voltage Operation
–5.0 (V CC = 4.5V to 5.5V)
–2.7 (V CC = 2.7V to 5.5V)
–1.8 (V CC = 1.8V to 3.6V)
•2.1 MHz Clock Rate (5V) Compatibility
•8-Byte Page Mode
•Block Write Protection
–Protect 1/4, 1/2, or Entire Array
•Write Protect (WP) Pin and Write Disable Instructions for Both Hardware and Software Data Protection
•Self-Timed Write Cycle (10 ms Max)
•High Reliability
–Endurance: 1 Million Write Cycles
–Data Retention: 100 Years
–ESD Protection: >4000V
•Automotive Grade and Extended Temperature Devices Available
•8-Pin PDIP and JEDEC SOIC Packages
Description
The AT25010/020/040 provides 1024/2048/4096 bits of serial electrically erasable programmable read only memory (EEPROM) organized as 128/256/512 words of 8 bits each. The device is optimized for use in many industrial and commercial applications where low power and low voltage operation are essential. The AT25010/020/040 is available in space saving 8-pin PDIP and 8-pin JEDEC (SOIC) packages.
The AT25010/020/040 is enabled through the Chip Select pin (CS) and accessed via a 3-wire interface consisting of Serial Data Input (SI), Serial Data Output (SO), and Serial Clock (SCK). All programming cycles are completely self-timed, and no separate ERASE cycle is required before WRITE.
BLOCK WRITE protection is enabled by programming the status register with one of four blocks of write protection. Separate program enable and program disable instructions are provided for additional data protection. Hardware data protection is provided via the WP pin to protect against inadvertent write attempts. The HOLD pin may be used to suspend any serial communication without resetting the serial sequence.
Pin Configurations
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Pin Name |
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8-Pin PDIP |
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Chip Select |
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CS |
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CS |
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1 |
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8 |
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VCC |
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SO |
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2 |
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7 |
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SCK |
Serial Data Clock |
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HOLD |
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WP |
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3 |
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6 |
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SCK |
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SI |
Serial Data Input |
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GND |
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4 |
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5 |
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SI |
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SO |
Serial Data Output |
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GND |
Ground |
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8-Pin SOIC |
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VCC |
Power Supply |
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Write Protect |
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1 |
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8 |
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VCC |
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WP |
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CS |
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SO |
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2 |
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7 |
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HOLD |
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HOLD |
Suspends Serial Input |
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WP |
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3 |
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6 |
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SCK |
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GND |
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4 |
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5 |
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SI |
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SPI Serial |
EEPROMs |
1K (128 x 8) |
2K (256 x 8) |
4K (512 x 8) |
AT25010 |
AT25020 |
AT25040 |
Rev. 0606E–08/98 |
1 |
Absolute Maximum Ratings*
.................................Operating Temperature |
-55°C to + 125°C |
*NOTICE: Stresses beyond those listed under “Absolute |
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Maximum Ratings” may cause permanent dam- |
Storage Temperature .................................... |
-65°C to + 150°C |
age to the device. This is a stress rating only and |
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functional operation of the device at these or any |
Voltage on Any Pin |
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other conditions beyond those indicated in the |
with Respect to Ground .................................... |
-1.0V to + 7.0V |
operational sections of this specification is not |
Maximum Operating Voltage |
6.25V |
implied. Exposure to absolute maximum rating |
conditions for extended periods may affect |
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DC Output Current |
5.0 mA |
device reliability. |
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Block Diagram
2 AT25010/020/040
AT25010/020/040
Pin Capacitance(1)
Applicable over recommended operating range from TA = 25°C, f = 1.0 MHz, V CC = +5.0V (unless otherwise noted).
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Test Conditions |
Max |
Units |
Conditions |
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COUT |
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Output Capacitance (SO) |
8 |
pF |
VOUT = 0V |
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CIN |
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Input Capacitance |
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SCK, SI, |
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6 |
pF |
VIN = 0V |
(CS, |
WP, |
HOLD) |
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Note: |
1. This parameter is characterized and is not 100% tested. |
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DC Characteristics
Applicable over recommended operating range from: TAI = -40°C to +85°C, V CC = +1.8V to +5.5V, TAC = 0°C to +70°C, VCC = +1.8V to +5.5V (unless otherwise noted).
Symbol |
Parameter |
Test Condition |
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Min |
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Max |
Units |
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(1) |
Supply Voltage |
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1.8 |
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5.5 |
V |
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VCC1 |
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VCC2 |
Supply Voltage |
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2.7 |
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5.5 |
V |
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VCC3 |
Supply Voltage |
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4.5 |
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5.5 |
V |
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ICC1 |
Supply Current |
VCC = 5.0V at 1 MHz, SO = Open |
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3.0 |
mA |
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ICC2 |
Supply Current |
VCC = 5.0V at 2 MHz, SO = Open |
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6.0 |
mA |
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(1) |
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μA |
Standby Current |
VCC = 1.8V |
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CS = VCC |
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100 |
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ISB1 |
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ISB2 |
Standby Current |
VCC = 2.7V |
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= VCC |
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100 |
μA |
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CS |
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ISB3 |
Standby Current |
VCC = 5.0V |
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= VCC |
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100 |
μA |
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CS |
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IIL |
Input Leakage |
VIN = 0V to VCC |
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-0.6 |
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3.0 |
μA |
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IOL |
Output Leakage |
VIN = 0V to VCC, TAC = 0°C to 70°C |
-0.6 |
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3.0 |
μA |
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V (2) |
Input Low Voltage |
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-0.6 |
V |
CC |
x 0.3 |
V |
IL |
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VIH(2) |
Input High Voltage |
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VCC x 0.7 |
VCC + 0.5 |
V |
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VOL1 |
Output Low Voltage |
4.5V ≤ VCC ≤ 5.5V |
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IOL = 2.0 mA |
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0.4 |
V |
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VOH1 |
Output High Voltage |
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IOH = -1.0 mA |
VCC - 0.8 |
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V |
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VOL2 |
Output Low Voltage |
1.8V ≤ VCC ≤ 3.6V |
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IOL = 0.15 mA |
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0.2 |
V |
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VOH2 |
Output High Voltage |
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IOH = -100 μA |
VCC - 0.2 |
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V |
Notes: 1. This parameter is preliminary and Atmel may change the specifications upon further characterization.
2. VIL min and VIH max are reference only and are not tested.
3
AC Characteristics
Applicable over recommended operating range from TA = -40°C to +85°C, V CC = As Specified, CL = 1 TTL Gate and 100 pF (unless otherwise noted).
Symbol |
Parameter |
Voltage |
Min |
Max |
Units |
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4.5 - 5.5 |
0 |
2.1 |
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fSCK |
SCK Clock Frequency |
2.7 - 5.5 |
0 |
2.1 |
MHz |
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1.8 - 3.6 |
0 |
0.5 |
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4.5 - 5.5 |
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2 |
μs |
tRI |
Input Rise Time |
2.7 - 5.5 |
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2 |
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1.8 - 3.6 |
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4.5 - 5.5 |
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2 |
μs |
tFI |
Input Fall Time |
2.7 - 5.5 |
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2 |
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1.8 - 3.6 |
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2 |
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4.5 - 5.5 |
200 |
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tWH |
SCK High Time |
2.7 - 5.5 |
200 |
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1.8 - 3.6 |
800 |
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4.5 - 5.5 |
200 |
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tWL |
SCK Low Time |
2.7 - 5.5 |
200 |
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1.8 - 3.6 |
800 |
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4.5 - 5.5 |
250 |
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tCS |
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CS |
High Time |
2.7 - 5.5 |
250 |
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1.8 - 3.6 |
1000 |
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4.5 - 5.5 |
250 |
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tCSS |
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CS |
Setup Time |
2.7 - 5.5 |
250 |
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1.8 - 3.6 |
1000 |
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4.5 - 5.5 |
250 |
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tCSH |
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CS |
Hold Time |
2.7 - 5.5 |
250 |
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1.8 - 3.6 |
1000 |
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4.5 - 5.5 |
50 |
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tSU |
Data In Setup Time |
2.7 - 5.5 |
50 |
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1.8 - 3.6 |
100 |
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4.5 - 5.5 |
50 |
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tH |
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Data In Hold Time |
2.7 - 5.5 |
100 |
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1.8 - 3.6 |
100 |
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4.5 - 5.5 |
100 |
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tHD |
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Hold |
Setup Time |
2.7 - 5.5 |
100 |
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ns |
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1.8 - 3.6 |
400 |
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4.5 - 5.5 |
200 |
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tCD |
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Hold |
Hold Time |
2.7 - 5.5 |
200 |
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1.8 - 3.6 |
400 |
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4.5 - 5.5 |
0 |
200 |
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tV |
Output Valid |
2.7 - 5.5 |
0 |
400 |
ns |
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1.8 - 3.6 |
0 |
800 |
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4.5 - 5.5 |
0 |
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tHO |
Output Hold Time |
2.7 - 5.5 |
0 |
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1.8 - 3.6 |
0 |
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4 AT25010/020/040
AT25010/020/040
AC Characteristics (Continued)
Applicable over recommended operating range from TA = -40°C to +85°C, V CC = As Specified, CL = 1 TTL Gate and 100 pF (unless otherwise noted).
Symbol |
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Parameter |
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Voltage |
Min |
Max |
Units |
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4.5 - 5.5 |
0 |
100 |
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tLZ |
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Hold |
to Output Low Z |
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2.7 - 5.5 |
0 |
100 |
ns |
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1.8 - 3.6 |
0 |
100 |
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4.5 - 5.5 |
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100 |
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tHZ |
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to Output High Z |
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2.7 - 5.5 |
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100 |
ns |
Hold |
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1.8 - 3.6 |
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100 |
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4.5 - 5.5 |
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250 |
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tDIS |
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Output Disable Time |
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2.7 - 5.5 |
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500 |
ns |
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1.8 - 3.6 |
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1000 |
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4.5 - 5.5 |
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10 |
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tWC |
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Write Cycle Time |
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2.7 - 5.5 |
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ms |
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1.8 - 3.6 |
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Endurance |
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5.0V, 25°C, Page Mode |
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1M |
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Write Cycles |
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Note: 1. |
This parameter is characterized and is not 100% tested. |
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5