24LC32 Microchip Technology Inc., 24LC32 Datasheet

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24LC32

Manufacturer Part Number
24LC32
Description
24LC3232K I 2 C Serial EEPROM in ISO Micromodule
Manufacturer
Microchip Technology Inc.
Datasheet
FEATURES
• ISO 7816 compliant contact locations
• Single supply with operation down to 2.5V
• Two wire serial interface bus, I
• 100 kHz (2.5V) and 400 kHz (5V) compatibility
• Self-timed ERASE and WRITE cycles
• Power on/off data protection circuitry
• 1,000,000 ERASE/WRITE cycles guaranteed
• 32 byte page or byte write modes available
• Schmitt trigger inputs for noise suppression
• Output slope control to eliminate ground bounce
• 2 ms typical write cycle time, byte or page
• Electrostatic discharge protection > 4000V
• Data retention > 200 years
• 8-pin PDIP and SOIC packages
• Temperature ranges:
DESCRIPTION
The Microchip Technology Inc. 24LC32A is a 4K x 8
(32K bit) Serial Electrically Erasable PROM in an ISO
micromodule for use in smart card applications. The
device has a page-write capability of up to 32 bytes.
I
M
2
C is a trademark of Philips Corporation.
- Maximum write current 3 mA at 6.0V
- Maximum read current 150 A at 6.0V
- Standby current 1 A max at 2.5V
- Commercial:
1997 Microchip Technology Inc.
32K I
2
0˚C
C™ Serial EEPROM in ISO Micromodule
to
2
C
24LC32A MODULE
+70˚C
compatible
ISO MODULE LAYOUT
BLOCK DIAGRAM
SDA
I/O
V
V
CONTROL
CC
SS
LOGIC
I/O
SCL
V
SCL
DD
CONTROL
MEMORY
LOGIC
XDEC
V
SDA
SS
DS21225A-page 1
HV GENERATOR
PAGE LATCHES
R/W CONTROL
SENSE AMP
EEPROM
ARRAY
YDEC

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24LC32 Summary of contents

Page 1

... Temperature ranges: - Commercial: 0˚C to +70˚C DESCRIPTION The Microchip Technology Inc. 24LC32A (32K bit) Serial Electrically Erasable PROM in an ISO micromodule for use in smart card applications. The device has a page-write capability bytes trademark of Philips Corporation. ...

Page 2

... MODULE 1.0 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

... BUS TIMING DATA LOW SCL STA SDA SDA OUT 1997 Microchip Technology Inc. 24LC32A MODULE Vcc = 4.5 - 6.0V STD. MODE FAST MODE Units Min Max Min Max — 100 — 400 kHz — 600 — ns — 1300 — ...

Page 4

... The bus must be con- trolled by a master device which generates the serial clock (SCL), controls the bus access, and generates the START and STOP conditions, while the 24LC32A works as slave. Both master and slave can operate as transmitter or receiver but the master device deter- are mines which mode is activated ...

Page 5

... NOT generating an acknowledge bit on the last byte that has been clocked out of the slave. In this case, the slave (24LC32A) will leave the data line HIGH to enable the master to generate the STOP condition. (See Figure 4-2) ...

Page 6

... Figure 5- 1) The control byte consists of a four bit control code; for the 24LC32A this is set as 1010 binary for read and write operations. The next three bits are device select bits on standard devices, however, for micromodules, these must be zeros. The last bit of the control byte defi ...

Page 7

... Therefore the next byte transmitted by the master is the high-order byte of the word address and will be written into the address pointer of the 24LC32A MODULE. The next byte is the least significant address byte. After receiving another acknowledge signal from the 24LC32A the master device will transmit the data word to be written into the addressed memory location ...

Page 8

... To perform this type of read operation, first the word address must be set. This is done by sending the word address to the 24LC32A 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 9

... Sequential Read Sequential reads are initiated in the same way as a ran- dom read except that after the 24LC32A transmits the first data byte, the master issues an acknowledge as opposed to the stop condition used in a random read. This acknowledge directs the 24LC32A to transmit the next sequentially addressed 8 bit word (see Figure 8- 3). Following the fi ...

Page 10

... MODULE 9.0 SHIPPING METHOD The micromodules will be shipped to customers in clear plastic trays. Each tray holds 150 modules, and the trays can be stacked in a manner similar to shipping die in waffle packs. A tray drawing with dimensions is shown in Figure 9-1. FIGURE 9-1: TRAY DIMENSIONS DS21225A-page 10 9.374 [238.09] 8 ...

Page 11

... FIGURE 9-2: MODULE DIMENSIONS 1997 Microchip Technology Inc. 24LC32A MODULE DS21225A-page 11 ...

Page 12

... MODULE NOTES: DS21225A-page 12 1997 Microchip Technology Inc. ...

Page 13

... NOTES: 1997 Microchip Technology Inc. 24LC32A MODULE DS21225A-page 13 ...

Page 14

... MODULE NOTES: DS21225A-page 14 1997 Microchip Technology Inc. ...

Page 15

... MODULE PRODUCT IDENTIFICATION SYSTEM To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office. 24LC32A — /MT 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 16

... Microchip. No licenses are conveyed, implicitly or otherwise, under any intellectual property rights. The Microchip logo and name are registered trademarks of Microchip Technology Inc. in the U.S.A. and other countries. All rights reserved. All other trademarks mentioned herein are the property of their respective companies. ...

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