24aa174 Microchip Technology Inc., 24aa174 Datasheet

no-image

24aa174

Manufacturer Part Number
24aa174
Description
16k 1.8v Cascadable I 2c? Serial Eeprom With Otp Security Page
Manufacturer
Microchip Technology Inc.
Datasheet
FEATURES
• Single supply with operation down to 1.8V
• 16 bytes OTP Secure Memory
• Low power CMOS technology
• Organized as eight blocks of 256 bytes
• 2-wire serial interface bus, I
• Functional address inputs for cascading up to 8
• Schmitt trigger, filtered inputs for noise suppres-
• Output slope control to eliminate ground bounce
• 100 kHz (1.8V) and 400 kHz (5V) compatibility
• Self-timed write cycle (including auto-erase)
• Page-write buffer for up to 16 bytes
• 2 ms typical write cycle time for page-write
• Hardware write protect for entire memory
• Can be operated as a serial ROM
• Factory programming (QTP) available
• ESD protection > 4,000V
• 1,000,000 Erase/Write cycles guaranteed
• Data retention > 200 years
• 8 pin DIP, 8-lead SOIC packages
• Available for commercial temperature range
DESCRIPTION
The Microchip Technology Inc. 24AA174 is a cascad-
able 16K bit Electrically Erasable PROM. The device is
organized as eight blocks of 256 x 8-bit memory with a
2-wire serial interface and provides a specially
addressed OTP (one-time programmable) 16 byte
security block. Low voltage design permits operation
down to 1.8 volts (end-of-life voltage for most popular
battery technologies) with standby and active currents
of only 5 A and 1 mA respectively. The 24AA174 also
has a page-write capability for up to 16 bytes of data.
The 24AA174 is available in the standard 8-pin DIP and
8-lead surface mount SOIC packages.
The three select pins, A0, A1, and A2, function as chip
select inputs and allow up to eight devices to share a
common bus, for up to 128K bits total system
EEPROM.
I
2
C is a trademark of Philips Corporation.
- 1 mA active current typical
- 10 A standby current typical at 5.5V
- 5 A standby current typical at 3.0V
(8 x 256 x 8)
devices
sion
- Commercial (C):
2004 Microchip Technology Inc.
16K 1.8V Cascadable I
0°C to +70°C
2
C
compatible
2
C
Serial EEPROM with OTP Security Page
PACKAGE TYPES
BLOCK DIAGRAM
A0
SDA
V
V
8-lead
SOIC
CONTROL
CC
SS
PDIP
LOGIC
A1
I/O
SCL
A2
Obsolete Device
V
A0
A1
A2
SS
V
A0
A1
A2
SS
24AA174
CONTROL
WP
MEMORY
LOGIC
1
2
3
4
1
2
3
4
XDEC
DS21102G-page 1
8
7
6
5
8
7
6
5
HV GENERATOR
EEPROM ARRAY
PAGE LATCHES
R/W CONTROL
SENSE AMP
(8 x 256 x 8)
V
WP
SCL
SDA
YDEC
CC
V
WP
SCL
SDA
CC

Related parts for 24aa174

24aa174 Summary of contents

Page 1

... Low voltage design permits operation down to 1.8 volts (end-of-life voltage for most popular battery technologies) with standby and active currents of only 5 A and 1 mA respectively. The 24AA174 also has a page-write capability for bytes of data. The 24AA174 is available in the standard 8-pin DIP and 8-lead surface mount SOIC packages ...

Page 2

... ELECTRICAL CHARACTERISTICS 1.1 Maximum Ratings* V ...................................................................................7.0V CC All inputs and outputs w.r.t. V ................ -0.3V to Vcc +1.0V SS 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 24AA174 Units Remarks kHz (Note 1) ns (Note 1) ns After this period the first clock pulse is generated ns Only relevant for repeated START condition ns ns ...

Page 4

... During reads, a master must signal an end of data to the slave by not generating an acknowledge bit on the last byte that has been clocked out of the slave. In this case, the slave (24AA174) will leave the data line HIGH to enable the master to generate the STOP con- dition. ...

Page 5

... When set to one a read operation is selected, when set to zero a write operation is selected. Following the start condition, the 24AA174 looks for the slave address for the device selected. Depending on the state of the R/W bit, the 24AA174 will select a read or write operation. Operation Control Code ...

Page 6

... ADDRESS (n) DATA FIGURE 5-1: Write Command Initiate Write Cycle Send Control Byte 6.0 WRITE PROTECTION The 24AA174 can be used as a serial ROM when the WP pin is connected to V ited and the entire memory will be write-protected DATA DATA ...

Page 7

... Then the master issues the control byte again but with the R/W bit set to a one. The 24AA174 will then issue an acknowledge and transmits the eight bit data word. The master will not acknowledge the transfer but does generate a stop condition and the 24AA174 dis- continues transmission (Figure 8-2) ...

Page 8

... If tied WRITE operations are inhibited. The CC entire memory will be write-protected. Read opera- tions are not affected. This feature allows the user to use the 24AA174 as a serial ROM when WP is enabled (tied to V 8.4 A0, A1, A2 These pins are used to configure the proper chip address in multiple-chip applications (more than one 24AA174 on the same bus) ...

Page 9

... WORD CONTROL A ADDRESS (n) BYTE R DATA 2 DATA WORD DATA (n) ADDRESS ( 24AA174 DATA READ/WRITE R LSB DATA ...

Page 10

... 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. 24AA174 – /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 11

... Use of Microchip’s products as critical components in life support systems is not authorized except with express written approval by Microchip. No licenses are conveyed, implicitly or otherwise, under any intellectual property rights.  2004 Microchip Technology Inc. Trademarks The Microchip name and logo, the Microchip logo, Accuron, dsPIC ...

Page 12

... Via Salvatore Quasimodo, 12 20025 Legnano (MI) Milan, Italy Tel: 39-0331-742611 Fax: 39-0331-466781 Netherlands Waegenburghtplein 4 NL-5152 JR, Drunen, Netherlands Tel: 31-416-690399 Fax: 31-416-690340 United Kingdom 505 Eskdale Road Winnersh Triangle Wokingham Berkshire, England RG41 5TU Tel: 44-118-921-5869 Fax: 44-118-921-5820 07/12/04  2004 Microchip Technology Inc. ...

Related keywords