24AA32-/P MICROCHIP [Microchip Technology], 24AA32-/P Datasheet

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24AA32-/P

Manufacturer Part Number
24AA32-/P
Description
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
I
Smart Serial is a trademark of Microchip Technology Inc.
FEATURES
• Voltage operating range: 1.8V to 6.0V
• Industry standard two-wire bus protocol, I
• Self-timed ERASE and WRITE cycles
• Power on/off data protection circuitry
• Endurance:
• 8 byte page, or byte modes available
• 1 page x 8 line input cache (64 bytes) for fast write
• Schmitt trigger, filtered inputs for noise suppression
• Output slope control to eliminate ground bounce
• 2 ms typical write cycle time, byte or page
• Factory programming (QTP) available
• Up to 8 devices may be connected to the same
• Electrostatic discharge protection > 4000V
• Data retention > 200 years
• 8-pin PDIP/SOIC packages
• Temperature ranges
DESCRIPTION
The Microchip Technology Inc. 24AA32 is a 4K x 8
(32K bit) Serial Electrically Erasable PROM capable of
operation across a broad voltage range (1.8V to 6.0V).
This device has been developed for advanced, low
power applications such as personal communications
or data acquisition. The 24AA32 features an input
cache for fast write loads with a capacity of eight 8-byte
pages, or 64 bytes. It also features a fixed 4K bit block
of ultra-high endurance memory for data that changes
frequently. The 24AA32 is capable of both random and
sequential reads up to the 32K boundary. Functional
address lines allow up to eight 24AA32 devices on the
same bus, for up to 256K bits address space.
2
C is a trademark of Philips Corporation.
- Peak write current 3 mA at 6.0V
- Maximum read current 150 A at 6.0V
- Standby current 1 A typical
compatible
- Including 100 kHz (1.8V) and 400 kHz (5V)
- 10,000,000 Erase/Write (E/W) cycles guaran-
- 1,000,000 E/W cycles guaranteed for
loads
bus for up to 256K bits total memory
- Commercial (C):
2004 Microchip Technology Inc.
modes
teed for High Endurance Block
Standard Endurance Block
32K 1.8V I
0°C to +70°C
2
C
2
C
Smart Serial
BLOCK DIAGRAM
Advanced CMOS technology and broad voltage range
make this device ideal for low-power/low voltage, non-
volatile code PACKAGE TYPEsand data applications.
The 24AA32 is available in the standard 8-pin plastic
DIP and 8-pin surface mount SOIC package.
SDA
I/O
V
V
CONTROL
CC
SS
LOGIC
SOIC
I/O
PDIP
Obsolete Device
Please use 24AA32A or 24AA65.
SCL
V
A0
A1
A2
SS
A0
V
A0
A1
A2
EEPROM
SS
CONTROL
MEMORY
A1
LOGIC
A2
24AA32
1
2
3
4
1
2
3
4
XDEC
DS21124E-page 1
8
7
6
5
8
7
6
5
HV GENERATOR
PAGE LATCHES
R/W CONTROL
SENSE AMP
EEPROM
V
NC
SCL
SDA
ARRAY
CACHE
YDEC
CC
V
NC
SCL
SDA
CC

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24AA32-/P Summary of contents

Page 1

... Temperature ranges - Commercial (C): 0°C to +70°C DESCRIPTION The Microchip Technology Inc. 24AA32 (32K bit) Serial Electrically Erasable PROM capable of operation across a broad voltage range (1.8V to 6.0V). This device has been developed for advanced, low power applications such as personal communications or data acquisition ...

Page 2

... ELECTRICAL CHARACTERISTICS 1.1 Maximum Ratings* V ..................................................................................7.0V CC All inputs and outputs w.r.t. V ............... -0. Storage temperature .....................................-65°C to +150°C Ambient temp. with power applied ................-65°C to +125°C Soldering temperature of leads (10 seconds) ............. +300°C ESD protection on all pins *Notice: Stresses above those listed under “Maximum Ratings” ...

Page 3

... Schmitt trigger inputs which provide improved T HIGH DAT SU DAT 24AA32 Units Remarks kHz (Note 1) ns (Note1) ns After this period the first clock pulse is generated ns Only relevant for repeated START condition ...

Page 4

... NOT generating an acknowledge bit on the last byte that has been clocked out of the slave. In this case, the slave (24AA32) will leave the data line HIGH to enable the master to generate the STOP condition. (D) ...

Page 5

... SDA bus checking the device type identifier being transmitted. Upon receiving a 1010 code and appropri- ate device select bits, the slave device outputs an acknowledge signal on the SDA line. Depending on the state of the R/W bit, the 24AA32 will select a read or write operation. FIGURE 3-3: ADDRESS SEQUENCE BIT ASSIGNMENTS ...

Page 6

... Page Write The write control byte, word address and the first data byte are transmitted to the 24AA32 in the same way byte write. But instead of generating a stop condi- tion, the master transmits up to eight pages of eight data bytes each (64 bytes total) which are temporarily stored in the on-chip page cache of the 24AA32 ...

Page 7

... To perform this type of read operation, first the word address must be set. This is done by sending the word address to the 24AA32 as part of a write operation (R/W bit set to 0). After the word address is sent, the master generates a start condition following the acknowledge. This termi- nates the write operation, but not before the internal address pointer is set ...

Page 8

... The device select bits A2, A1, A0 can be used to expand the contiguous address space for up to 256K bits by adding up to eight 24AA32's on the same bus. In this case, software can use A0 of the control byte as address bit A12 address bit A13, and A2 as address bit A14 ...

Page 9

... PIN DESCRIPTIONS 7.1 A0, A1, A2 Chip Address Inputs The A0..A2 inputs are used by the 24AA32 for multiple device operation and conform to the two-wire bus stan- dard. The levels applied to these pins define the address block occupied by the device in the address map. A particular device is selected by transmitting the corresponding bits (A2, A1, A0) in the control byte (Figure 3-3) ...

Page 10

... FIGURE 7-1: CACHE WRITE TO THE ARRAY STARTING AT A PAGE BOUNDARY 1 Write command initiated at byte 0 of page 3 in the array; First data byte is loaded into the cache byte 0. cache page 0 cache cache • • • byte 0 byte 1 3 Write from cache into array initiated by STOP bit. ...

Page 11

... Product Identification System To order or to obtain information, e.g., on pricing or delivery, please use the listed part numbers, and refer to the factory or the listed sales offices. 24AA32 - /P Package: Temperature Range: Device: Sales and Support Data Sheets Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recom- mended workarounds ...

Page 12

... NOTES: DS21124E-page 12 2004 Microchip Technology Inc. ...

Page 13

... October 2003. The Company’s quality system processes and procedures are for its PICmicro 8-bit MCUs, K ® EE devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip’s quality system for the design and manufacture of development systems is ISO 9001:2000 certified. DS21124E-page 13 L code hopping ® ...

Page 14

W ORLDWIDE AMERICAS Corporate Office 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Technical Support: 480-792-7627 Web Address: www.microchip.com Atlanta 3780 Mansell Road, Suite 130 Alpharetta, GA 30022 Tel: 770-640-0034 Fax: 770-640-0307 Boston 2 Lan Drive, Suite ...

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