Siemens SLA24C32-D, SLA24C32-D-3, SLA24C32-D-3-P, SLA24C32-D-P, SLA24C32-S Datasheet

...

Standard EEPROM ICs

SLx 24C32 32 Kbit (4096 × 8bit)

Serial CMOS-EEPROM with

C Synchronous 2-Wire Bus

Data Sheet Preliminary 1998-07-27

SLx 24C32 Revision History: Current Version: Preliminary 1998-07-27

Previous Version: 02.98, 04.98 Page

(in previous Version)

Page (in current Version)

Subjects (major changes since last revision)

3 3 Text was changed to “Typical programming time 5 ms for up to

32 bytes”. 11, 12 11, 13 The erase/write cycle is finished latest after 10 21 21 The write or erase cycle is finished latest after 10

8ms.

4ms. 24 24 The line “erase/write cycle” was removed. 24 24 Chapter 8.4 “Erase and Write Characteristics” has been added.

I2CBus

Purchase of Siemens I

C system p rovided the system conforms to the I2C specifications defined by Philips.

the I

C components conveys the license under the Philips I2C patent to use the components in

Edition Preliminary 1998-07-27 Published by Siemens AG,

Bereich Halbleiter, MarketingKommunikation, Balanstraße 73, 81541 München

Siemens AG 1998.

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

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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.

of the Semiconductor Group of Siemens AG, may only be used in life-support devices or systems2with the express

32 Kbit (4096 × 8bit)SerialCMOS

EEPROMs, I

Preliminary

Features

• Data EEPROM internally organized as

4096 bytes and 128 pages × 32 bytes

• Page Protection Mode for protecting the EEPROM against unintended data changes (SLx 24C32.../P types only)

• Low power CMOS

•

• Two wire serial interface bus, I

• Three chip select pins to address 8 devices

• Filtered inputs for noise suppression with

= 2.7 to 5.5 V operation

Schmitt trigger

C Synchronous 2-Wire Bus

C-Bus compatible

SLx 24C32

P-DIP-8-4

• 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

cycles

– Data retention 40 years

– 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

Values are temperature dependent, for further information please refer to your Siemens sales office.

Semiconductor Group 3 Preliminary 1998-07-27

SLx 24C32

Ordering Information Type Ordering Code Package Temperature Voltage

SLA 24C32-D SLA 24C32-D/P

SLA 24C32-S SLA 24C32-S/P

SLA 24C32-D-3 SLA 24C32-D-3/P

SLA 24C32-S-3 SLA 24C32-S-3/P

SLE 24C32-D SLE 24C32-D/P

SLE 24C32-S SLE 24C32-S/P

Q67100-H3746 Q67100-H3752

Q67100-H3748 Q67100-H3753

Q67100-H3747 Q67100-H3754

Q67100-H3749 Q67100-H3769

Q67100-H3235 Q67100-H3755

Q67100-H3236 Q67100-H3756

P-DIP-8-4 – 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

CS0

CS2

CS1

IEP02125

Figure 1 Pin Configuration (top view)

P-DSO-8-3P-DIP-8-4

WP SCL63

SDA54

CS0

CS1

CS2

1 2 3 4

IEP02124

SCL SDA

Semiconductor Group 4 Preliminary 1998-07-27

Pin Definitions and Functions Table 1 Pin No. Symbol Function

1, 2, 3 CS0, CS1, CS2 Chip select inputs

SLx 24C32

Ground 5 SDA Serial bidirectional data bus 6 SCL Serial clock input 7 WP Write protection input 8

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

bus requires a pull-up resistor to

Chip Select (CS0, CS1, CS2)

The CS0, CS1 and CS2 pins are chip select inputs either hard wired or actively driven

or VSS. These inputs allow the selection of one of eight possible devices sharing

acommonbus.

Write Protection (WP)

WP switched to WP switched to

Semiconductor Group 5 Preliminary 1998-07-27

allows normal read/write operations.

protects the EEPROM against changes (hardware write protection).

SLx 24C32

2 Description

The SLx 24C32 device is a serial electrically erasable and programmable read only memory (EEPROM), organized as 4096 × 8 bit. The data memory is divided into 128 pages. The 32 bytes of a page can be programmed simultaneously.

The device conforms to the specification of the 2-wire serial I

pins allow the addressing of 8 devices on the I

C-Bus. Low voltage design permits

operation down to 2.7 V with low active and standby currents. All devices have a

minimum endurance of 10

erase/write cycles.

The device operates at 5.0 V ± 10% with a maximum clock frequency of 400 kHz and at

2.7 ... 5.5 V with a maximum clock frequency of 100 kHz. The device is available as 5 V

type ( applications and as 3 V type (

= 4.5 … 5.5 V) with two temperature ranges for industrial and automotive

= 2.7 … 5.5 V) for industrial applications. The

EEPROMs are mounted in eight-pin DIP and DSO packages or are also supplied as chips.

C-Bus. Three chip select

SCL

SDA

Start/

Stop

Logic

CS0 CS1 CS2

Chip Address

Control

Logic

Serial

Control

Logic

Address

Logic

Programming

Control

H.V. Pump

DEC

EEPROM

Page Logic

Y DEC

Dout/ACK

IEB02525

Figure 2 Block Diagram

Semiconductor Group 6 Preliminary 1998-07-27

SLx 24C32

3 I2C-Bus Characteristics

AccesstotheSLx24C32deviceisgivenviatheI of two wires SCL and SDA for clock and data. The protocol is master/slave oriented, where the serial EEPROM always takes the role of a slave.

Slave 1 Slave 2 Slave 3 Slave 4

SCL

Master

SDA

C bus. This bidirectional bus consists

Slave 8Slave 5 Slave 6 Slave 7

IES02183

Figure 3 Bus Configuration

Master Device that initiates the transfer of data and provides the clock for transmit

and receive operations.

Slave Device addressed by the master, capable of receiving and transmitting

data.

Transmitter The device using 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.

Receiver The device using the SDA as input is defined as the receiver.

Semiconductor Group 7 Preliminary 1998-07-27

SLx 24C32

The conventions for the serial clock line and the bidirectional data line are shown in figure 4.

SCL

SDA

START Condition Data allowed STOP Condition

to Change

Acknowledge

ACK ACK

IED02128

Figure 4

C-Bus Timing Conventions for START Condition, STOP Condition, Data

Validation and Transfer of Acknowledge ACK

Standby Mode 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 Condition High to low transition of SDA when SCL is high, preceding all

commands.

STOP Condition Low to high transition of SDA when SCL is high, terminating all

communications. A STOP condition after writing data initiates an EEPROM programming cycle. A STOP condition after reading data from the EEPROM initiates the standby mode.

Acknowledge A 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. The EEPROM as the receiving device responds with 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 SDAline (no ACK) followed by a STOP condition.

Data Transfer Data 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 Group 8 Preliminary 1998-07-27

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