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PDF 24C32 Data sheet ( Hoja de datos )
| Número de pieza | 24C32 | |
| Descripción | 32K 5.0V I2C Smart Serial EEPROM | |
| Fabricantes | MicrochipTechnology | |
| Logotipo |  |
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24C32
32K 5.0V I2C™ Smart Serial EEPROM
FEATURES
• Voltage operating range: 4.5V to 5.5V
- Peak write current 3 mA at 5.5V
- Maximum read current 150 µA at 5.5V
- Standby current 1 µA typical
• Industry standard two-wire bus protocol, I2C™
compatible
- Including 100 kHz and 400 kHz modes
• Self-timed write cycle (including auto-erase)
• Power on/off data protection circuitry
• Endurance:
- 10,000,000 Erase/Write cycles
guaranteed for High Endurance Block
- 1,000,000 E/W cycles guaranteed for
Standard 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 suppres-
sion
• Output slope control to eliminate ground bounce
• 2 ms typical write cycle time, byte or page
• Up to 8 chips 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
- Industrial (I):
-40˚C to +85˚C
DESCRIPTION
The Microchip Technology Inc. 24C32 is a 4K x 8 (32K
bit) Serial Electrically Erasable PROM. This device has
been developed for advanced, low power applications
such as personal communications or data acquisition.
The 24C32 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 endur-
ance memory for data that changes frequently. The
24C32 is capable of both random and sequential reads
up to the 32K boundary. Functional address lines allow
up to 8 - 24C32 devices on the same bus, for up to 256K
bits address space. Advanced CMOS technology
makes this device ideal for low-power non-volatile code
and data applications. The 24C32 is available in the
standard 8-pin plastic DIP and 8-pin surface mount
SOIC package
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
SDA
MEMORY
CONTROL
LOGIC
XDEC
EEPROM ARRAY
PAGE LATCHES
Cache
YDEC
VCC
VSS
SENSE AMP
R/W CONTROL
I2C is a trademark of Philips Corporation.
© 1996 Microchip Technology Inc.
This document was created with FrameMaker 4 0 4
DS21061F-page 1
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 24C32 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 (R/W)
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 24C32 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
24C32
acknowledge signal on the SDA line. Depending on the
state of the R/W bit, the 24C32 will select a read or write
operation.
Operation
Control
Code
Device Select
R/W
Read
Write
1010
1010
Device Address
Device Address
1
0
FIGURE 3-2:
START
CONTROL BYTE
ALLOCATION
READ/WRITE
SLAVE ADDRESS
R/W A
1 0 1 0 A2 A1 A0
FIGURE 3-3: ADDRESS SEQUENCE BIT ASSIGNMENTS
CONTROL BYTE
1
0
1
0
A
2
A
1
A
0
R/W
SLAVE
ADDRESS
DEVICE
SELECT
BUS
ADDRESS BYTE 1
0
0
0
0
AA
11 10
A
9
A
8
ADDRESS BYTE 0
A
7
•
•
•
••
•
A
0
© 1996 Microchip Technology Inc.
DS21061F-page 5
5 Page 
24C32
24C32 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.
24C32 -
/P
Package:
Temperature
Range:
P = Plastic DIP (300 mil Body), 8-lead
SM = Plastic SOIC (207 mil Body, EIAJ standard)
Blank = 0°C to +70°C
I = -40°C to +85°C
Device:
24C32 32K I2C Serial EEPROM (100 kHz/400 kHz)
24C32T 32K I2C Serial EEPROM (Tape and Reel)
© 1996 Microchip Technology Inc.
DS21061F-page 11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet 24C32.PDF ] | |
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