25LC512
512 Kbit SPI Bus Serial EEPROM
Device Selection Table
Part Number
25LC512
V
CC
Range
2.5-5.5V
Page Size
128 Byte
Temp. Ranges
I,E
Packages
P, SN, SM, MF
Features:
• 20 MHz max. Clock Speed
• Byte and Page-level Write Operations:
- 128-byte page
- 5 ms max.
- No page or sector erase required
• Low-Power CMOS Technology:
- Max. Write Current: 5 mA at 5.5V, 20 MHz
- Read Current: 10 mA at 5.5V, 20 MHz
- Standby Current: 1A at 2.5V (Deep power-
down)
• Electronic Signature for Device ID
• Self-Timed Erase and Write cycles:
- Page Erase (5 ms, typical)
- Sector Erase (10 ms/sector, typical)
- Bulk Erase (10 ms, typical)
• Sector Write Protection (16K byte/sector):
- 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
• High Reliability:
- Endurance: 1 Million erase/write cycles
- Data Retention: >200 years
- ESD Protection: >4000V
• Temperature Ranges Supported:
- Industrial (I):
-40C to +85C
- Automotive (E):
-40°C to +125°C
• Pb-free and RoHS Compliant
Description:
The Microchip Technology Inc. 25LC512 is a 512 Kbit
serial EEPROM memory with byte-level and page-level
serial EEPROM functions. It also features Page, Sector
and Chip erase functions typically associated with
Flash-based products. These functions are not required
for byte or page write operations. 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 by 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 25LC512 is available in standard packages includ-
ing 8-lead PDIP, SOIC, and advanced 8-lead DFN
package. All packages are Pb-free and RoHS
compliant.
Package Types (not to scale)
DFN
25LC512
CS 1
SO 2
WP 3
V
SS
4
(MF)
8
7
6
5
V
CC
HOLD
SCK
SI
PDIP/SOIC/SOIJ
(P, SN, SM)
25LC512
8
7
6
5
CS
SO
WP
V
SS
1
2
3
4
V
CC
HOLD
SCK
SI
Pin Function Table
Name
CS
SO
WP
V
SS
SI
SCK
HOLD
V
CC
Function
Chip Select Input
Serial Data Output
Write-Protect
Ground
Serial Data Input
Serial Clock Input
Hold Input
Supply Voltage
2010 Microchip Technology Inc.
DS22065C-page 1
25LC512
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings
(†)
V
CC
.............................................................................................................................................................................6.5V
All inputs and outputs w.r.t. V
SS
......................................................................................................... -0.6V to V
CC
+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):
Automotive (E):
Min.
.7 V
CC
-0.3
-0.3
—
V
CC
-0.2
—
—
—
T
A
= -40°C to +85°C
T
A
= -40°C to +125°C
Max.
V
CC
+1
0.3 V
CC
0.2 V
CC
0.4
—
±1
±1
7
Units
V
V
V
V
V
A
A
pF
V
CC
2.7V
V
CC
< 2.7V
I
OL
= 2.1 mA
I
OH
= -400
A
CS = V
CC
, V
IN
= V
SS
or V
CC
CS = V
CC
, V
OUT
= V
SS
or V
CC
T
A
= 25°C, CLK = 1.0 MHz,
V
CC
= 5.0V
(Note)
V
CC
= 5.5V; F
CLK
= 20.0 MHz;
SO = Open
V
CC
= 2.5V; F
CLK
= 10.0 MHz;
SO = Open
V
CC
= 5.5V
V
CC
= 2.5V
CS = V
CC
= 5.5V, Inputs tied to V
CC
or
V
SS
, 125°C
CS = V
CC
= 5.5V, Inputs tied to V
CC
or
V
SS
, 85°C
CS = V
CC
= 2.5V, Inputs tied to V
CC
or
V
SS
, 125°C
CS = V
CC
= 2.5V, Inputs tied to V
CC
or
V
SS
, 85°C
V
CC
= 2.5V to 5.5V
V
CC
= 2.5V to 5.5V
Test Conditions
DC CHARACTERISTICS
Param.
No.
D001
D002
D003
D004
D005
D006
D007
D008
Sym.
V
IH1
V
IL1
V
IL2
V
OL
V
OH
I
LI
I
LO
C
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)
D009
I
CC
Read
Operating current
—
—
10
5
mA
mA
mA
mA
A
A
A
A
D010
D011
I
CC
Write
I
CCS
Standby current
—
—
—
—
7
5
20
10
D012
I
CCSPD
Deep power-down
current
—
2
1
Note:
This parameter is periodically sampled and not 100% tested.
DS22065C-page 2
2010 Microchip Technology Inc.
25LC512
TABLE 1-2:
AC CHARACTERISTICS
Industrial (I):
Automotive (E):
Characteristic
Clock frequency
CS setup time
CS hold time
CS disable time
Data setup time
Data hold time
CLK rise time
CLK fall time
Clock high time
Clock low time
Clock delay time
Clock enable time
Output valid from clock low
Output hold time
Output disable time
HOLD setup time
HOLD hold time
HOLD low to output
High-Z
HOLD high to output valid
CS High to Standby mode
CS High to Deep power-
down
Chip erase cycle time
Sector erase cycle time
Internal write cycle time
Min.
—
—
25
50
50
100
50
5
10
10
20
—
—
25
50
25
50
50
50
—
—
0
—
—
10
20
10
20
15
30
15
30
—
—
—
—
—
T
A
= -40°C to +85°C
T
A
= -40°C to +125°C
Max.
20
10
—
—
—
—
—
—
—
—
—
20
20
—
—
—
—
—
—
25
50
—
25
50
—
—
—
—
—
—
—
—
100
100
10
10
5
Units
MHz
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
s
s
ms
ms
ms
V
CC
= 2.0V to 5.5V
V
CC
= 2.5V to 5.5V
Conditions
4.5V
V
CC
5.5V
(I)
2.5V
V
CC
5.5V
(I, E)
4.5V
V
CC
5.5V
(I)
2.5V
V
CC
5.5V
(I, E)
4.5V
V
CC
5.5V
(I)
2.5V
V
CC
5.5V
(I, E)
—
4.5V
V
CC
5.5V
(I)
2.5V
V
CC
5.5V
(I, E)
4.5V
V
CC
5.5V
(I)
2.5V
V
CC
5.5V
(I, E)
(Note 1)
(Note 1)
4.5V
V
CC
5.5V
(I)
2.5V
V
CC
5.5V
(I, E)
4.5V
V
CC
5.5V
(I)
2.5V
V
CC
5.5V
(I, E)
—
—
4.5V
V
CC
5.5V
(I)
2.5V
V
CC
5.5V
(I, E)
(Note 1)
4.5V
V
CC
5.5V
(I)
2.5V
V
CC
5.5V
(I, E)
4.5V
V
CC
5.5V
(I)
2.5V
V
CC
5.5V
(I, E)
4.5V
V
CC
5.5V
(I)
2.5V
V
CC
5.5V
(I, E)
4.5V
V
CC
5.5V
(I)
2.5V
V
CC
5.5V
(I, E)
(Note 1)
4.5V
V
CC
5.5V
(I)
2.5V
V
CC
5.5V
(I, E)
—
—
—
—
Byte or Page mode and Page
Erase
AC CHARACTERISTICS
Param.
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Sym.
F
CLK
T
CSS
T
CSH
T
CSD
Tsu
T
HD
T
R
T
F
T
HI
T
LO
T
CLD
T
CLE
T
V
T
HO
T
DIS
T
HS
T
HH
T
HZ
19
20
21
22
23
24
T
HV
T
REL
T
PD
T
CE
T
SE
T
WC
Note 1:
This parameter is periodically sampled and not 100% tested.
2:
This parameter is not tested but established by characterization and qualification. 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.
2010 Microchip Technology Inc.
DS22065C-page 3
25LC512
TABLE 1-2:
AC CHARACTERISTICS (CONTINUED)
Industrial (I):
Automotive (E):
Characteristic
Endurance
Min.
1M
T
A
= -40°C to +85°C
T
A
= -40°C to +125°C
Max.
—
Units
V
CC
= 2.0V to 5.5V
V
CC
= 2.5V to 5.5V
Conditions
AC CHARACTERISTICS
Param.
No.
25
Sym.
—
E/W Page mode, 25°C, 5.5V
(Note 2)
Cycles
Note 1:
This parameter is periodically sampled and not 100% tested.
2:
This parameter is not tested but established by characterization and qualification. 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.
TABLE 1-3:
AC Waveform:
V
LO
= 0.2V
AC TEST CONDITIONS
—
(Note 1)
(Note 2)
—
0.5 V
CC
0.5 V
CC
V
HI
= V
CC
- 0.2V
V
HI
= 4.0V
C
L
= 30 pF
Timing Measurement Reference Level
Input
Output
Note 1:
For V
CC
4.0V
2:
For V
CC
> 4.0V
DS22065C-page 4
2010 Microchip Technology Inc.
ADI Reference Circuit
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