24AA174 Datasheet, PDF (1/12 Pages) Microchip Technology – 16K 1.8V Cascadable I2C™ Serial EEPROM with OTP Security Page

Obsolete Device
24AA174
16K 1.8V Cascadable I²C^™ Serial EEPROM with OTP Security Page
FEATURES
• Single supply with operation down to 1.8V
• 16 bytes OTP Secure Memory
• Low power CMOS technology
- 1 mA active current typical
- 10 µA standby current typical at 5.5V
- 5 µA standby current typical at 3.0V
• Organized as eight blocks of 256 bytes
(8 x 256 x 8)
• 2-wire serial interface bus, I²C compatible
• Functional address inputs for cascading up to 8
devices
• Schmitt trigger, filtered inputs for noise suppres-
sion
• 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
- Commercial (C):
0°C to +70°C
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 µA 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.
I²C is a trademark of Philips Corporation.
 2004 Microchip Technology Inc.
PACKAGE TYPES
PDIP
A0 1
A1 2
A2 3
VSS 4
8 VCC
7 WP
6 SCL
5 SDA
8-lead
SOIC
A0
1
A1 ²
A2 ³
VSS
4
8
VCC
7 _WP
6 _SCL
5 _SDA
BLOCK DIAGRAM
A0 A1 A2
WP
HV GENERATOR
I/O
CONTROL
LOGIC
MEMORY
CONTROL
LOGIC
XDEC
SDA SCL
EEPROM ARRAY
(8 x 256 x 8)
PAGE LATCHES
YDEC
V CC
V SS
SENSE AMP
R/W CONTROL
DS21102G-page 1