1999 Microchip Technology Inc.
DS21101G-page 1
FEATURES
Single supply with operation down to 2.5V
16 bytes OTP Secure Memory
Low power CMOS technology
- 1 mA active current typical
- 10
A standby current typical at 5.5V
-5
A 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, ltered inputs for noise suppression
Output slope control to eliminate ground bounce
100 kHz (2.5V) 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 temperature ranges:
DESCRIPTION
The Microchip Technology Inc. 24LC174 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 2.5 volts with standby and active currents of
only 5
A and 1 mA respectively. The 24LC174 also
has a page-write capability for up to 16 bytes of data.
The 24LC174 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.
- Commercial (C):
0°C to +70°C
- Industrial (I):
-40° to
+85°
PACKAGE TYPES
BLOCK DIAGRAM
24LC174
A0
A1
A2
VSS
1
2
3
4
6
7
8
9
VCC
WP
SCL
SDA
24LC174
A0
A1
A2
VSS
1
2
3
4
6
7
8
9
VCC
WP
SCL
SDA
PDIP
8-lead
SOIC
HV GENERATOR
EEPROM ARRAY
(8 x 256 x 8)
PAGE LATCHES
YDEC
XDEC
SENSE AMP
R/W CONTROL
MEMORY
CONTROL
LOGIC
I/O
CONTROL
LOGIC
WP
SDA
SCL
VCC
VSS
A0
A2
A1
24LC174
16K 2.5V Cascadable I2C Serial EEPROM with OTP Security Page
I2C is a trademark of Philips Corporation.