24c02a-esn Microchip Technology Inc., 24c02a-esn Datasheet

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24c02a-esn

Manufacturer Part Number
24c02a-esn
Description
1k/2k/4k 5.0v Serial Eeproms
Manufacturer
Microchip Technology Inc.
Datasheet
FEATURES
• Low power CMOS technology
• Hardware write protect
• Two wire serial interface bus, I
• 5.0V only operation
• Self-timed write cycle (including auto-erase)
• Page-write buffer
• 1ms write cycle time for single byte
• 1,000,000 Erase/Write cycles guaranteed
• Data retention >200 years
• 8-pin DIP/SOIC packages
• Available for extended temperature ranges
DESCRIPTION
The Microchip Technology Inc. 24C01A/02A/04A is a
1K/2K/4K bit Electrically Erasable PROM. The device
is organized as shown, with a standard two wire serial
interface. Advanced CMOS technology allows a signif-
icant reduction in power over NMOS serial devices. A
special feature in the 24C02A and 24C04A provides
hardware write protection for the upper half of the block.
The 24C01A and 24C02A have a page write capability
of two bytes and the 24C04A has a page length of eight
bytes. Up to eight 24C01A or 24C02A devices and up
to four 24C04A devices may be connected to the same
two wire bus.
This device offers fast (1ms) byte write and
extended (-40 C to 125 C) temperature operation. It
is recommended that all other applications use
Microchip’s 24LCXXB.
I
Organization
Write Protect
Page Write
Buffer
2
C is a trademark of Philips Corporation.
1996 Microchip Technology Inc.
- Commercial (C):
- Industrial (I):
- Automotive (E):
24C01A
128 x 8
2 Bytes
None
1K/2K/4K 5.0V I
-40˚C to
-40˚C to +125˚C
0˚C to
080-0FF
24C02A
This document was created with FrameMaker 4 0 4
258 x 8
2 Bytes
2
C
+70˚C
+85˚C
compatible
2 x 256 x 8
100-1FF
24C04A
8 Bytes
24C01A/02A/04A
2
C Serial EEPROMs
PACKAGE TYPES
BLOCK DIAGRAM
SDA
SCL
14-lead
SOIC
8-lead
SOIC
* “TEST” pin in 24C01A
DIP
Vcc
Vss
V
A0
A1
A2
V
SS
V
NC
NC
NC
A0
A1
A2
A0
A1
A2
SS
SS
A0 A1 A2 WP
Data Reg.
Slave Addr.
Data
Buffer
(FIFO)
Control
Logic
1
2
3
4
1
2
3
4
1
2
3
4
5
6
7
A
d
d
e
s
s
r
14
11
13
12
10
Vpp
P
o
n
e
i
t
r
Increment
8
7
6
5
9
8
8
7
6
5
A0 to
A7
DS11183D-page 1
V
WP*
SCL
SDA
CC
NC
V
NC
SCL
SDA
NC
WP
V
WP*
SCL
SDA
CC
CC
R/W Amp
Memory
Array
A8

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24c02a-esn Summary of contents

Page 1

... The 24C01A and 24C02A have a page write capability of two bytes and the 24C04A has a page length of eight bytes eight 24C01A or 24C02A devices and up to four 24C04A devices may be connected to the same two wire bus. ...

Page 2

... Serial Address/Data I/O Serial Clock (24C01A only Write Protect Input +5V Power Supply Conditions (Note) OUT = 100 kHz, program cycle time = 1 ms, = 100 kHz, program cycle time = 1 ms, =5V (no PROGRAM active STO STOP 1996 Microchip Technology Inc. ...

Page 3

... BUS TIMING DATA LOW SCL STA STA SDA SDA OUT 1996 Microchip Technology Inc. 24C01A/02A/04A Min. Typ Max. Units — — 100 kHz 4000 — — 4700 — — — — 1000 — — 300 4000 — ...

Page 4

... In this case, the slave must leave the data line HIGH to enable the master to generate the STOP condition. (D) (D) ADDRESS OR DATA ACKNOWLEDGE ALLOWED VALID TO CHANGE (C) (A) STOP CONDITION 1996 Microchip Technology Inc. ...

Page 5

... A0 is not used on the 24C04A and must be connected to either 24C01A or 24C02A devices and up to four 24C04A devices may be connected to the bus. Chip selection is then accomplished through software by setting the bits A0, A1 and A2 of the slave address to the corresponding hard-wired logic levels of the selected 24C01A/02A/04A. ...

Page 6

... Condition to Initiate Write Cycle Send Control Byte with R Acknowledge S T DATA DATA DATA ACKNOWLEDGE POLLING FLOW Send Send Stop Send Start Did Device NO (ACK = 0)? YES Next Operation 1996 Microchip Technology Inc. ...

Page 7

... WRITE PROTECTION Programming of the upper half of the memory will not take place if the WP pin of the 24C02A or 24C04A is connected to V (+5.0V). The device will accept slave CC and word addresses but if the memory accessed is write protected by the WP pin, the 24C02A/04A will not generate an acknowledge after the first byte of data has been received, and thus the program cycle will not be started when the STOP condition is asserted ...

Page 8

... SCL Serial Clock This input is used to synchronize the data transfer from and to the device. 10.4 WP Write Protection This pin must be connected to either V 24C02A or 24C04A. It has no effect on 24C01A. If tied PROGRAM operations onto the upper CC memory block will not be executed. Read operations are possible. ...

Page 9

... NOTES: 1996 Microchip Technology Inc. 24C01A/02A/04A DS11183D-page 9 ...

Page 10

... NOTES: DS11183D-page 10 1996 Microchip Technology Inc. ...

Page 11

... +125 C 2 24C01A Serial EEPROM 2 24C01AT Serial EEPROM (Tape and Reel) 2 24C02A Serial EEPROM 2 24C02AT Serial EEPROM (Tape and Reel) 2 24C04A Serial EEPROM 2 24C04AT Serial EEPROM (Tape and Reel) DS11183D-page 11 ...

Page 12

... 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. All rights reserved. All other trademarks mentioned herein are the property of their respective companies. ...

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