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PDF 24AA32 Data sheet ( Hoja de datos )
| Número de pieza | 24AA32 | |
| Descripción | 32K 1.8V I2C Smart Serial EEPROM | |
| Fabricantes | MicrochipTechnology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de 24AA32 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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24AA32
32K 1.8V I2C™ Smart Serial EEPROM
FEATURES
• Voltage operating range: 1.8V to 6.0V
- Peak write current 3 mA at 6.0V
- Maximum read current 150 µA at 6.0V
- Standby current 1 µA typical
• Industry standard two-wire bus protocol, I2C™
compatible
- Including 100 kHz (1.8V) and 400 kHz (5V)
modes
• Self-timed ERASE and WRITE cycles
• Power on/off data protection circuitry
• Endurance:
- 10,000,000 Erase/Write (E/W) cycles guaran-
teed for High Endurance Block
- 1,000,000 E/W cycles guaranteed for Stan-
dard Endurance Block
• 8 byte page, or byte modes available
• 1 page x 8 line input cache (64 bytes) for fast write
loads
• 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
bus for up to 256K bits total memory
• Electrostatic discharge protection > 4000V
• Data retention > 200 years
• 8-pin PDIP/SOIC packages
• Temperature ranges
- Commercial (C):
0°C to +70°C
DESCRIPTION
The Microchip Technology Inc. 24AA32 is a 4K x 8 (32K
bit) Serial Electrically Erasable PROM capable of oper-
ation 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 fre-
quently. The 24AA32 is capable of both random and
sequential reads up to the 32K boundary. Functional
address lines allow up to 8 - 24AA32 devices on the
same bus, for up to 256K bits address space. Advanced
CMOS technology and broad voltage range make this
device ideal for low-power/low voltage, nonvolatile code
I2C is a trademark of Philips Corporation.
PACKAGE TYPES
PDIP
A0 1
A1 2
A2 3
VSS 4
8 VCC
7 NC
6 SCL
5 SDA
SOIC
A0 1
A1 2
A2 3
VSS 4
8 VCC
7 NC
6 SCL
5 SDA
BLOCK DIAGRAM
A0..A2
HV GENERATOR
I/O
CONTROL
LOGIC
I/O
SCL
MEMORY
CONTROL
LOGIC
XDEC
EEPROM ARRAY
PAGE LATCHES
Cache
SDA
VCC
VSS
YDEC
SENSE AMP
R/W CONTROL
and data applications. The 24AA32 is available in the
standard 8-pin plastic DIP and 8-pin surface mount
SOIC package.
© 1996 Microchip Technology Inc.
DS21124C-page 1
This document was created with FrameMaker 4 0 4
1 page  
3.6 Device Addressing
A control byte is the first byte received following the
start condition from the master device. The control byte
consists of a four bit control code; for the 24AA32 this
is set as 1010 binary for read and write operations. The
next three bits of the control byte are the device select
bits (A2, A1, A0). They are used by the master device
to select which of the eight devices are to be accessed.
These bits are in effect the three most significant bits of
the word address. The last bit of the control byte defines
the operation to be performed. When set to a one a
read operation is selected, and when set to a zero a
write operation is selected. The next two bytes received
define the address of the first data byte (Figure 3-3).
Because only A11...A0 are used, the upper four
address bits must be zeros. The most significant bit of
the most significant byte of the address is transferred
first.
Following the start condition, the 24AA32 monitors the
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.
24AA32
FIGURE 3-2:
START
CONTROL BYTE
ALLOCATION
READ/WRITE
SLAVE ADDRESS
R/W A
1 0 1 0 A2 A1 A0
Operation
Read
Write
Control
Code
1010
1010
Device Select
Device Address
Device Address
R/W
1
0
FIGURE 3-3: ADDRESS SEQUENCE BIT ASSIGNMENTS
CONTROL BYTE
ADDRESS BYTE 1
1
0
1
0
A
2
A
1
A
0
R/W
0
0
0
0
AA
11 10
A
9
A
8
SLAVE
ADDRESS
DEVICE
SELECT
BUS
ADDRESS BYTE 0
A
7
•
•
•
••
•
A
0
© 1996 Microchip Technology Inc.
This document was created with FrameMaker 4 0 4
DS21124C-page 5
5 Page 
24AA32
24AA32 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:
P = Plastic DIP (300 mil Body), 8-lead
SN = Plastic SOIC (150 mil Body), 8-lead
Blank = 0˚C to +70˚C
24AA32 16K I2C Serial EEPROM
24AA32T 16K I2C Serial EEPROM (Tape and Reel)
© 1996 Microchip Technology Inc.
DS21124C-page 11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet 24AA32.PDF ] | |
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