33Text was changed to “Typical programming time 5 ms for up to
16 bytes”.
55WP=V
protects upper half entire memory.
CC
4, 54, 5CS0, CS1 and CS2 were replaced by n.c.
5–The paragraph “Chip Select (CS0, CS1, CS2)” was removed
completely.
11, 1211, 12The erase/write cycle is finished latest after 10
8ms.
1515Figure 11: second command byte is a CSR and not CSW.
1919“Capacitive l oad …” were added.
2020Some timings were changed.
2020The line “erase/write cycle” was removed.
2020Chapter 7.4 “Erase and Write Characteristics” has been added.
I2CBus
Purchase of Siemens I
2
C system p rovided the system conforms to the I2C specifications defined by Philips.
the I
2
C components conveys the license under the Philips I2C patent to use the components in
Edition 1998-07-27
Published by Siemens AG,
Bereich Halbleiter, MarketingKommunikation, Balanstraße 73,
81541 München
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 man ufacturer.
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. Yo u must bear the costs of transport.
For pa cking material that is returned to us unsorted or which we are not obliged to accept, we shall have to invoice you for any costs incurred.
Components used in life-support devices or systems must be expressly authorized for such purpose!
Critical components
written appr oval 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.
1
of the Semiconductor Group of Siemens AG, may only be used in life-support devices or systems2with the express
8/16 Kbit (1024/2048 × 8bit)SerialCMOS
2
EEPROMs, I
Features
• Data EEPROM internally organized as
1024/2048 bytes and 64/128 pages × 16 bytes
• Low power CMOS
V
•
• Two wire serial interface bus, I
• Filtered inputs for noise suppression with
• Clock frequency up to 400 kHz
• High programming flexibility
= 2.7 to 5.5 V operation
CC
compatible
Schmitt trigger
C Synchronous 2-Wire Bus
2
C-Bus
SLx 24C08/16
P-DIP-8-4
– Internal programming voltage
– Self timed programming cycle including erase
– Byte-write and page-write programming, between
1 and 16 bytes
– Typical programming time 5 ms for up to 16 bytes
• High reliability
6
– Endurance 10
cycles
– Data retention 40 years
1)
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-DSO-8-3
1)
Values are temperature dependent, for further information please refer to your Siemens Sales office.
Semiconductor Group31998-07-27
SLx 24C08/16
Ordering Information
TypeOrdering CodePackageTemperatureVoltage
SLA 24C08-DQ67100-H3572P-DIP-8-4– 40 °C … + 85 °C4.5 V...5.5 V
SLA 24C08-SQ67100-H3518P-DSO-8-3– 40 °C … + 85 °C4.5 V...5.5 V
SLA 24C08-D-3Q67100-H3435P-DIP-8-4– 40 °C … + 85 °C2.7 V...5.5 V
SLA 24C08-S-3Q67100-H3517P-DSO-8-3– 40 °C … + 85 °C2.7 V...5.5 V
SLE 24C08-DQ67100-H3226P-DIP-8-4– 40°C … + 125 °C4.5 V...5.5 V
SLE 24C08-SQ67100-H3227P-DSO-8-3– 40°C … + 125 °C4.5 V...5.5 V
SLA 24C16-DQ67100-H3513P-DIP-8-4– 40 °C … + 85 °C4.5 V...5.5 V
SLA 24C16-SQ67100-H3508P-DSO-8-3– 40 °C … + 85 °C4.5 V...5.5 V
SLA 24C16-D-3Q67100-H3512P-DIP-8-4– 40 °C … + 85 °C2.7 V...5.5 V
SLA 24C16-S-3Q67100-H3507P-DSO-8-3– 40 °C … + 85 °C2.7 V...5.5 V
SLE 24C16-DQ67100-H3229P-DIP-8-4– 40°C … + 125 °C4.5 V...5.5 V
SLE 24C16-SQ67100-H3230P-DSO-8-3– 40°C … + 125 °C4.5 V...5.5 V
Other types are available on request
– Temperature range (– 55 °C … + 150 °C)
– Package (die, wafer delivery)
1Pin Configuration
P-DSO-8-3P-DIP-8-4
N.C.
N.C.
N.C.
V
SS
V
18
CC
72
WP
SCL63
SDA54
N.C.
N.C.
N.C.
V
SS
1
2
3
4
IEP02514
V
8
CC
7
WP
6
SCL
SDA
5
IEP02515
Figure 1
Pin Configuration (top view)
Semiconductor Group41998-07-27
Pin Definitions and Functions
Table 1
Pin No.SymbolFunction
1, 2, 3N. C.Not connected
SLx 24C08/16
4
V
SS
Ground
5SDASerial bidirectional data bus
6SCLSerial clock input
7WPWrite protection input
8
V
CC
Supply voltage
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
V
bus requires a pull-up resistor to
CC
.
Write Protection (WP)
V
WP switched to
WP switched to
allows normal read/write operations.
SS
V
protects the entire EEPROM against changes (hardware write
CC
protection).
Semiconductor Group51998-07-27
2Description
SLx 24C08/16
The SLx 24C08/16 device is a serial e
emory (EEPROM), organized as 1024/2048 × 8 bit. The data memory is divided into
m
lectrically erasable and programmable read only
64/128 pages. The 16 bytes of a page can be programmed simultaneously.
2
The device conforms to the specification of the 2-wire serial I
C-Bus.Low voltagedesign
permits operation down to 2.7 V with low active and standby currents.
The device operates at 5.0 V ± 10% with a maximum clock frequency of 400 kHz and at
2.7 ... 4.5 V with a maximum clock frequency of 100 kHz. The device is available as 5 V
V
type (
applications and as 3 V type (
= 4.5 … 5.5 V) with two temperature ranges for industrial and automotive
CC
V
= 2.7 … 5.5 V) for industrial applications. The
CC
EEPROMs are mounted in eight-pin DIP and DSO packages or are also supplied as
chips.
V
SS
V
CC
Chip Address
Control
Logic
WP
Programming
Control
H.V. Pump
SCL
SDA
Start/
Stop
Logic
Serial
Control
Logic
Address
Logic
X
DEC
EEPROM
Page Logic
Y DEC
Dout/ACK
IEB02530
Figure 2
Block Diagram
Semiconductor Group61998-07-27
SLx 24C08/16
3I2C-Bus Characteristics
The SLx 24C08/16 devices support a master/slave bidirectional bus oriented protocol in
which the EEPROM always takes the role of a slave.
V
CC
Slave 1Slave 2Slave 3Slave 4
SCL
Master
SDA
Slave 8Slave 5Slave 6Slave 7
V
CC
IES02183
Figure 3
Bus Configuration
MasterDevice that initiates the transfer of data and provides the clock for both
transmit and receive operations.
SlaveDevice addressed by the master, capable of receiving and transmitting
data.
TransmitterThe device with the SDA as output is defined as the transmitter. Due to
the open drain characteristic of the SDA output the device applying a low
level wins.
ReceiverThe device with the SDA as input is defined as the receiver.
Semiconductor Group71998-07-27
SLx 24C08/16
The conventions for the serial clock line and the bidirectional data line are shown in
figure 4.
SCL
SDA
START ConditionData allowedSTOP Condition
12
to Change
8
Acknowledge
9
ACKACK
1
9
IED02128
Figure 4
2
C-Bus Timing Conventions for START Condition, STOP Condition, Data Valida-
I
tion and Transfer of Acknowledge ACK
StandbyMode in which the bus is not busy (no serial transmission, no
programming): both clock (SCL) and data line (SDA) are in high
state. The device enters the standby mode after a STOP condition
or after a programming cycle.
START ConditionHigh to low transition of SDA when SCL is high, preceding all
commands.
STOP ConditionLow to high transition of SDA when SCL is high, terminating all
communications.ASTOPconditioninitiatesanEEPROM
programming cycle. A STOP condition after reading a data byte
from the EEPROM initiates the Standby mode.
AcknowledgeA successful reception of eight data bits is indicated by the
receiver by pulling down the SDA line during the following clock
cycle of SCL (ACK). The transmitter on the other hand has to
release the SDA line after the transmission of eight data bits.
TheEEPROM asthereceivingdevice respondswith an
acknowledge, when addressed. The master, on the other side,
acknowledges each data byte transmitted by the EEPROM and
can at any time end a read operation by releasing the SDA line (no
ACK) followed by a STOP condition.
Data TransferData must change only during low SCL state, data remains valid
on the SDA bus during high SCL state. Nine clock pulses are
required to transfer one data byte, the most significant bit (MSB)
is transmitted first.
Semiconductor Group81998-07-27
SLx 24C08/16
4Device Addressing and EEPROM Addressing
After a START condition, the master always transmits a Command Byte CSW or CSR.
After the acknowledge of the EEPROM a Control Byte follows, its content and the
transmitter depend on the previous Command Byte. The description of the Command
and Control Bytes is shown in table 2.
Command ByteSelects operation: the least significant bit b0 is low for a write
operation (C
read operation (C
Contains address information: in the CSW Command Byte, the
bit positions b2 or b3 to b1 are decoded for the two or three
uppermost EEPROM address bits A9 or A10 to A8 (in the CSR
Command Byte, the bit positions b3 to b1 are left undefined).
Control ByteFollowing CSW (b0 = 0): contains the eight lower bits of the
EEPROM address (EEA) bit A7 to A0.
hip Select Write Command Byte CSW) or set high for a
hip Select Read Command Byte CSR).
Following CSR (b0 = 1): contains the data read out, transmitted by
the EEPROM. The EEPROM data are read as long as the master
pulls down SDA after each byte in order to acknowledge the
transfer. The read operation is stopped by the master by releasing
SDA (no acknowledge is applied) followed by a STOP condition.
Table 2
2
Command and Control Byte for I
C-Bus Addressing of Chip and EEPROM
DefinitionFunction
b7b6b5b4b3b2b1b0
CSW1010A10A9A80Chip Select for Write
CSR1010xxx1Chip Select for Read
EEAA7A6A5A4A3A2A1A0EEPROM address
The device has an internal address counter which points to the current EEPROM
address.
The address counter is incremented
– after a data byte to be written has been acknowledged, during entry of further data
byte
– during a byte read, thus the address counter points to the following address after
reading a data byte.
Semiconductor Group91998-07-27
SLx 24C08/16
The timing conventions for read and write operations are described in figures 5 and 6.
Command Byte (CSW)Data Transfer to EEPROM
SCL
SDA
1234
0
1
1
5
0
A10A9A8
6
START from MasterAcknowledge from EEPROMAcknowledge from EEPROM
Figure 5
Timing of the Command Byte CSW
Command Byte (CSR)Data Transfer from EEPROM
SCL
SDA
1234
0
1
1
5
6
0
XXX
8
7
0
8
7
ACK
1
10
9
9
A7
10
1112
A6A5
1112
13
A4
13
14
A3
14
1516
A2A1
1516
17
A0
ACK
IED02257
17
ACK
18
18
START from MasterAcknowledge from MasterAcknowledge from EEPROM
IED02185
Figure 6
Timing of the Command Byte CSR
Semiconductor Group101998-07-27
SLx 24C08/16
5Write Operations
Changing of the EEPROM data is initiated by the master with the command byte CSW.
Depending on the state of the Write Protection pin WP either one byte (Byte Write) or up
to 16 bytes (Page Write) are modified in one programming procedure.
5.1Byte Write
Address SettingAfter a START condition the master transmits the Chip Select
Write byte CSW. The EEPROM acknowledges the CSW byte
during the ninth clock cycle. The following byte with the
EEPROM address (A0 to A7) is loaded into the address
counter of the EEPROM and acknowledged by the EEPROM.
Transmission of DataFinally the master transmits the data byte which is also
acknowledged by the EEPROM into the internal buffer.
Programming CycleThen the master applies a STOP condition which starts the
internal programming procedure. The data bytes are written in
the memory location addressed in the EEA byte (A0 to A7)
andtheCSWbyte(A8toA9orA10).Theprogramming
procedure consists of an internally timed erase/write cycle. In
the first step, the selected byte is erased to “1”. With the next
internal step, the addressed byte is written according to the
contents of the buffer.
S
Master
SDA Line
Bus Activity
EEPROM
T
A
Command Byte
R
T
S
CSW
EEPROM Address
EEA
0
A
C
K
Data ByteBus Activity
A
C
K
S
T
O
P
P
A
C
K
IED02129
Figure 7
Byte Write Sequence
The erase/write cycle is finished latest after 8 ms. Acknowledge polling may be used for
speed enhancement in order to indicate the end of the erase/write cycle (refer to
chapter 5.3 Acknowledge Polling).
procedure up to the first data byte. In a page write instruction
however, entry of the EEPROM address byte EEA is followed
by a sequence of one to maximum sixteen data bytes with the
new data to be programmed. These bytes are transferred to
the internal page buffer of the EEPROM.
Transmission of DataThe first entered data byte will be stored according to the
EEPROM address n given by EEA (A0 to A7) and CSW (A8 to
A9 or A10). The internal address counter is incremented
automaticallyaftertheentereddatabytehasbeen
acknowledged. The next data byte is then stored at the next
higher EEPROM address. EEPROM addresses within the
same page have common page address bits A4 through A10.
Only the respective four least significant address bits A0
through A3areincremented,as alldata bytesto be
programmed simultaneously have to be within the same page.
Programming CycleThe master stops data entry by applying a STOP condition,
which also starts the internally timed erase/write cycle. In the
first step, all selected bytes are erased to “1”. With the next
internal step, the addressed bytes are written according to the
contents of the page buffer.
Those bytes of the page that have not been addressed are not included in the
programming.
S
Master
SDA Line
Bus Activity
EEPROM
T
A
Command Byte
R
T
S
CSW
EEPROM Address
EEA n
0
A
C
K
Data Byte nData Byte n+1Data Byte n+15Bus Activity
A
C
K
A
C
K
A
C
K
S
T
O
P
P
A
C
K
IED02140
Figure 8
Page Write Sequence
The erase/write cycle is finished latest after 8 ms. Acknowledge polling may be used for
speed enhancement in order to indicate the end of the erase/write cycle (refer to
chapter 5.3 Acknowledge Polling).
Semiconductor Group121998-07-27
SLx 24C08/16
5.3Acknowledge Polling
During the erase/write cycle the EEPROM will not respond to a new command byte until
the internal write procedure is completed. At the end of active programming the chip
returns to the standby mode and the last entered EEPROM byte remains addressed by
the address counter. To determine the end of the internal erase/write cycle acknowledge
polling can be initiated by the master by sending a START condition followed by a
command byte CSR or CSW (read with b0 = 1 or write with b0 = 0). If the internal erase/
write cycle is not completed, the device will not acknowledge the transmission. If the
internal erase/write cycle is completed, the device acknowledges the received command
byte and the protocol activities can continue.
Internal Programming
Procedure
Send CS-Byte
Acknowledge
from EEPROM
Next Operation
Figure 9
Flow Chart “Acknowledge Polling”
Send Start
No
received?
Yes
IED02131
Semiconductor Group131998-07-27
STOP from Master initiates erase/write cycle
START from Master
CSR
CSR
SLx 24C08/16
CSR
SDA
SDA
P
S
STOP from Master initiates erase/write cycle
START from Master
CSW
P
S
1
S
CSW
0
S
Figure 10
Principle of Acknowledge Polling
1
S
Acknowledge of EEPROM
indicates complete erase/
write cycle
0
SS
S
Acknowledge of EEPROM
indicates complete erase/
write cycle
1
e.g. STOP condition
CSW
0
P
P
IED02166
Semiconductor Group141998-07-27
SLx 24C08/16
6Read Operations
Reading of the EEPROM data is initiated by the Master with the command byte CSR.
6.1Random Read
Random read operations allow the master to access any memory location.
Address SettingThe master generates a START condition followed by the
command byteCSW. The receiptof the CSW-byte is
acknowledged by the EEPROM with a low on the SDA line.
Now the master transmits the EEPROM address (EEA) to the
EEPROM and the internal address counter is loaded with the
desired address.
Transmission of CSRAfter the acknowledge for the EEPROM address is received,
the master generates a START condition, which terminates
the initiated write operation. Then the master transmits the
command byte CSR for read, which is acknowledged by the
EEPROM.
Transmission of
EEPROM Data
STOP Condition from
Master
S
T
Bus Activity
Master
SDA Line
Bus Activity
EEPROM
A
Command Byte
R
T
S
Figure 11
Random Read
During the next eight clock pulses the EEPROM transmits the
data byte and increments the internal address counter.
During the following clock cycle the masters releases the bus
and then transmits the STOP condition.
S
S
T
O
P
P
IED02133
CSW
EEPROM Address
EEA n
0
A
C
K
T
A
Command Byte
R
T
S
A
C
K
CSR
1
A
C
K
Data Byte
Semiconductor Group151998-07-27
SLx 24C08/16
6.2Current Address Read
The EEPROM content is read without setting an EEPROM address, in this case the
current content of the address counter will be used (e.g. to continue a previous read
operation after the Master has served an interrupt).
Transmission of CSRFor a current address read the master generates a START
condition, which is followed by the command byte CSR (c
elect read). The receipt of the CSR-byte is acknowledged by
s
the EEPROM with a low on the SDA line.
hip
Transmission of
EEPROM Data
STOP Condition from
Master
Bus Activity
Master
SDA Line
Bus Activity
EEPROM
Figure 12
Current Address Read
During the next eight clock pulses the EEPROM transmits the
data byte and increments the internal address counter.
During the following clock cycle the masters releases the bus
and then transmits the STOP condition.
S
T
A
Command Byte
R
T
S
CSR
1
A
C
K
Data Byte
S
T
O
P
P
IED02132
Semiconductor Group161998-07-27
SLx 24C08/16
6.3Sequential Read
A sequential read is initiated in the same way as a current read or a random read except
that the master acknowledges the data byte transmitted by the EEPROM. The EEPROM
then continues the data transmission. The internal address counter is incremented by
one during each data byte transmission.
A sequential read allows the entire memory to be read during one read operation. After
the highest addressable memory location is reached, the internal address pointer “rolls
over” to the address 0 and the sequential read continues.
The transmission is terminated by the master by releasing the SDA line (no
acknowledge) and generating a STOP condition (see figure 13).
S
Bus Activity
Master
T
A
Command Byte
R
T
CSW
A
C
K
A
C
K
S
T
O
P
SDA Line
Bus Activity
EEPROM
Figure 13
Sequential Read
S
1
A
A
C
C
K
K
Data Byte n
Data Byte n+xData Byte n+1
P
IED02134
Semiconductor Group171998-07-27
SLx 24C08/16
7Electrical Characteristics
The listed characteristics are ensured over the operating range of the integrated circuit.
Typical characteristics specify mean values expected over the production spread. If not
T
otherwise specified, typical characteristics apply at
voltage.
7.1Absolute Maximum Ratings
Stresses above those listed here may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at these or any other conditions
above those indicated in the operational section of this data sheet is not implied.
Exposure to absolute maximum ratings for extended periods may affect device reliability.
ParameterLimit ValuesUnits
=25°C and the given supply
A
Operating temperaturerange 1 (industrial)
range 2 (automotive)
–40to+85
–40to+125
°C
°C
Storage temperature– 65 to + 150°C
Supply voltage– 0.3 to + 7.0V
V
All inputs and outputs with respect to ground– 0.3 to
+0.5V
CC
ESD protection (human body model)4000V
7.2DC Characteristics
ParameterSymbolLimit ValuesUnits Test Condition
min.typ.max.
Supply voltage
Supply current
V
CC
V
CC
1)
I
CC
4.55.5V5 V type
2.75.5V3 V type
13mAVCC=5V;fc= 100 kHz
(write)
Standby
current
I
2)
SB
50µAInputs at VCCor V
SS
Input leakage
I
LI
0.110µAVIN= VCCor V
SS
current
Output leakage
I
LO
0.110µAV
= VCCor V
OUT
SS
current
Input low
V
IL
–0.30.3× V
CC
V
voltage
Semiconductor Group181998-07-27
SLx 24C08/16
7.2DC Characteristics (cont’d)
ParameterSymbolLimit ValuesUnits Test Condition
min.typ.max.
Input high
V
IH
0.7 × V
voltage
Output low
V
OL
voltage
Input/output
C
I/O
capacitance
(SDA)
Input
C
IN
capacitance
(other pins)
Capacitive load
C
b
for each bus line
1)
The values for ICCare maximum peak values
2)
Valid over the whole temperaturerange
3)
This parameter is characterized only
CC
V
+0.5 V
CC
0.4VIOL=3mA;VCC=5V
I
=2.1mA;VCC=3V
OL
3)
8
3)
6
pFVIN=0V;VCC=5V
pFVIN=0V;VCC=5V
400pF
Semiconductor Group191998-07-27
7.3AC Characteristics
SLx 24C08/16
ParameterSymbolLimit Values
V
= 2.7-5.5 V
CC
min.max.min.max.
SCL clock frequency
Clock pulse width low
Clock pulse width high
SDA and SCL rise time
SDA and SCL fall time
Start set-up time
Start hold time
Data in set-up time
Data in hold time
SCL low to SDA data out valid
Data out hold time
Stop set-up time
f
SCL
t
low
t
high
t
R
t
F
t
SU.STA
t
HD.STA
t
SU.DAT
t
HD.DAT
t
AA
t
DH
t
SU.STO
4.71.2µs
4.00.6µs
4.70.6µs
4.00.6µs
200100ns
00µs
0.14.50.10.9µs
10050ns
4.00.6µs
100400kHz
1000
300
Limit Values
V
= 4.5-5.5 V
CC
1)
1)
300ns
300ns
Units
Timethe bus must befree before
t
BUF
4.71.2µs
a new transmission can start
SDA and SCL spike suppression