Standard EEPROM ICs
SLx 24C64
64 Kbit (8192
×
8 bit)
Serial CMOS-EEPROM with
I
2
C Synchronous 2-Wire Bus
Data Sheet Preliminary 1998-07-27
SLx 24C64
Revision History:
Previous Version:
Page
Page
(in previous (in current
Version)
Version)
3
11, 12
21
24
24
I
2
C Bus
Current Version: Preliminary 1998-07-27
05.98
Subjects (major changes since last revision)
3
11, 13
21
24
24
Text was changed to “Typical programming time 5 ms for up to
32 bytes”.
The erase/write cycle is finished latest after 10 8 ms.
The write or erase cycle is finished latest after 10 4 ms.
The line “erase/write cycle” was removed.
Chapter 8.4 “Erase and Write Characteristics” has been added.
Purchase of Siemens
I
2
C components conveys the license under the Philips
I
2
C patent to use the components in
the
I
2
C system provided the system conforms to the
I
2
C specifications defined by Philips.
Edition Preliminary 1998-07-27
Published by Siemens AG,
Bereich Halbleiter, Marketing-
Kommunikation, Balanstraße 73,
81541 München
©
Siemens AG 1998.
All Rights Reserved.
Attention please!
As far as patents or other rights of third parties are concerned, liability is only assumed for components, not for applications, processes
and circuits implemented within components or assemblies.
The information describes the type of component and shall not be considered as assured characteristics.
Terms of delivery and rights to change design reserved.
For questions on technology, delivery and prices please contact the Semiconductor Group Offices in Germany or the Siemens Companies
and Representatives worldwide (see address list).
Due to technical requirements components may contain dangerous substances. For information on the types in question please contact
your nearest Siemens Office, Semiconductor Group.
Siemens AG is an approved CECC manufacturer.
Packing
Please use the recycling operators known to you. We can also help you – get in touch with your nearest sales office. By agreement we
will take packing material back, if it is sorted. You must bear the costs of transport.
For packing material that is returned to us unsorted or which we are not obliged to accept, we shall have to invoice you for any costs in-
curred.
Components used in life-support devices or systems must be expressly authorized for such purpose!
Critical components
1
of the Semiconductor Group of Siemens AG, may only be used in life-support devices or systems
2
with the express
written approval of the Semiconductor Group of Siemens AG.
1 A critical component is a component used in a life-support device or system whose failure can reasonably be expected to cause the
failure of that life-support device or system, or to affect its safety or effectiveness of that device or system.
2 Life support devices or systems are intended (a) to be implanted in the human body, or (b) to support and/or maintain and sustain hu-
man life. If they fail, it is reasonable to assume that the health of the user may be endangered.
64 Kbit (8192
×
8 bit) Serial CMOS
EEPROMs,
I
2
C Synchronous 2-Wire Bus
SLx 24C64
Preliminary
Features
• Data EEPROM internally organized as
8192 bytes and 256 pages
×
32 bytes
• Page Protection Mode for protecting the EEPROM
against unintended data changes
(SLx 24C64.../P types only)
• Low power CMOS
•
V
CC
= 2.7 to 5.5 V operation
• Two wire serial interface bus,
I
2
C-Bus compatible
• Three chip select pins to address 8 devices
• Filtered inputs for noise suppression with
Schmitt trigger
• Clock frequency up to 400 kHz
• High programming flexibility
– Internal programming voltage
– Self timed programming cycle including erase
– Byte-write and page-write programming, between
1 and 32 bytes
– Typical programming time 5 ms for up to 32 bytes
• High reliability
– Endurance 10
6
cycles
1)
– Data retention 40 years
1)
– ESD protection 4000 V on all pins
• 8 pin DIP/DSO packages
• Available for extended temperature ranges
– Industrial:
−
40 °C to + 85 °C
– Automotive:
−
40 °C to + 125 °C
P-DIP-8-4
P-DSO-8-3
1)
Values are temperature dependent, for further information please refer to your Siemens sales office.
Semiconductor Group
3
Preliminary 1998-07-27
SLx 24C64
Ordering Information
Type
SLA 24C64-D
SLA 24C64-D/P
SLA 24C64-S
SLA 24C64-S/P
SLA 24C64-D-3
SLA 24C64-D-3/P
SLA 24C64-S-3
SLA 24C64-S-3/P
SLE 24C64-D
SLE 24C64-D/P
SLE 24C64-S
SLE 24C64-S/P
Ordering Code
Q67100-H3768
Q67100-H3762
Q67100-H3767
Q67100-H3761
Q67100-H3766
Q67100-H3760
Q67100-H3765
Q67100-H3759
Q67100-H3238
Q67100-H3758
Q67100-H3239
Q67100-H3757
Package
P-DIP-8-4
Temperature
Voltage
– 40 °C … + 85 °C 4.5 V...5.5 V
P-DSO-8-3 – 40 °C … + 85 °C 4.5 V...5.5 V
P-DIP-8-4
– 40 °C … + 85 °C 2.7 V...5.5 V
P-DSO-8-3 – 40 °C … + 85 °C 2.7 V...5.5 V
P-DIP-8-4
– 40°C … + 125 °C 4.5 V...5.5 V
P-DSO-8-3 – 40°C … + 125 °C 4.5 V...5.5 V
Other types are available on request:
– Temperature range (– 55 °C
…
+ 150 °C)
– Package (die, wafer delivery)
– 3V types with automotive temperature range (– 40 °C
…
+ 125 °C)
1
Pin Configuration
P-DIP-8-4
CS0
CS1
CS2
P-DSO-8-3
V
CC
WP
SCL
SDA
1
2
3
4
8
7
6
5
IEP02125
CS0
CS1
CS2
V
SS
1
2
3
4
8
7
6
5
IEP02124
V
CC
WP
SCL
SDA
V
SS
Figure 1
Pin Configuration
(top view)
Semiconductor Group
4
Preliminary 1998-07-27
SLx 24C64
Pin Definitions and Functions
Table 1
Pin No.
1, 2, 3
4
5
6
7
8
Symbol
CS0, CS1, CS2
Function
Chip select inputs
Ground
Serial bidirectional data bus
Serial clock input
Write protection input
Supply voltage
V
SS
SDA
SCL
WP
V
CC
Pin Description
Serial Clock (SCL)
The SCL input is used to clock data into the device on the rising edge and to clock data
out of the device on the falling edge.
Serial Data (SDA)
SDA is a bidirectional pin used to transfer addresses, data or control information into the
device or to transfer data out of the device. The output is open drain, performing a wired
AND function with any number of other open drain or open collector devices. The SDA
bus requires a pull-up resistor to
V
CC
.
Chip Select (CS0, CS1, CS2)
The CS0, CS1 and CS2 pins are chip select inputs either hard wired or actively driven
to
V
CC
or
V
SS
. These inputs allow the selection of one of eight possible devices sharing
a common bus.
Write Protection (WP)
WP switched to
V
SS
allows normal read/write operations.
WP switched to
V
CC
protects the EEPROM against changes (hardware write protection).
Semiconductor Group
5
Preliminary 1998-07-27
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