ImageQuest Q770 - Block Diagram

Q770 Technical Service Manual
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DESCRIPTION
The Microchip Technology Inc. 24LC04B/08B is a 4K-or 8K-bit Electrically Erasable PROM.
The device is organized as two or four blocks of 256¡¿8 bit memory with a two wire serial interface.
Low voltage design permits operation down to 2.5 volts with standby and active currents of obly 5µA
and 1mA respectively.
The 24LC04B/08B also has a page-write capability for up to 16 bytes of data. The 24LC04B/08B is
available in the standard 8-pin DIP and both 8-lead and 14-lead surface mount SOIC packages.
BLOCK DIAGRAM
I/O
CONTROL
LOGIC
SDA
SCL
WP
Vcc
Vss
MEMORY
CONTROL
LOGIC
XDEC
EEPROM ARRAY
(2¡¿256¡¿8) OR
(4¡¿256¡¿8)
PAGE LATCHES
HV GENERATOR
YDEC
SENSE AMP
R/W CONTROL
PIN CONFIGURATION
PC is a trademark of Philips Corporation
A0

A1
A2
1
2
3
4
WP
V
SS
V SS
SCL
SDA
8
7
6
5
A0

A1
A2
1
2
3
4
WP
V
SS
V SS
SCL
SDA
8
7
6
5
NC

A0
A1
1
2
3
4
5
6
7
Vcc
NC
NC
WP
NC
14
13
12
11
10
9
8

A2
V SS
NC
SCL
SDA
NC
8-SOIC Package
14-SOIC Package
DIP Package