Contents
Features ..............................................................................................
Pin Assignment....................................................................................
Pin Functions .......................................................................................
Block Diagram .....................................................................................
Instruction Set......................................................................................
Absolute Maximum Ratings .................................................................
Recommended Operationg Conditions ................................................
Pin Capacitance...................................................................................
Endurance ...........................................................................................
DC Characteristics ...............................................................................
AC Characteristics ...............................................................................
Operation .............................................................................................
Receiving a Start-Bit ............................................................................
Three-wire Interface(DI-DO direct connection).....................................
Connecting to CPU with a Serial Port ..................................................
Characteristics .....................................................................................
Ordering Information ............................................................................
Dimensions ..........................................................................................
1
1
1
2
2
2
3
3
3
4
5
6
9
9
10
11
16
17
DI
SC
ON
TI
NU
ED
PR
OD
UC
T
Rev.1.1
CMOS SERIAL E
2
PROM
S-29X90A Series
The S-29X90A Series is high speed, low power 1K/2K/4K-bit serial
E
2
PROM with a wide operating voltage range. They are organized as
64-word×16-bit, 128-word×16-bit and 256-word×16-bit, respectively.
Each is capable of sequential read, where addresses are automatically
incremented for each 16-bit block.
Interface is structured so that this IC can be directly connected to the
CPU with serial ports. 8-bit instructions make it easy to prepare your
own software.
n
Features
n
Pin Assignment
8-pin DIP
Top view
CS
SK
DI
DO
1
2
3
4
8
7
6
5
ED
NC
V
CC
CS
SK
•Low
power consumption
Standby : 1.0
µ
A Max. (Vcc=6.5 V)
Operating : 0.8 mA Max. (Vcc=5.5 V)
0.4 mA Max. (Vcc=2.5 V)
•Wide
operating voltage range
Write
: 2.5 to 6.5 V
Read
: 1.8 to 6.5 V
•
Sequential read capable
PR
•Can
be easily connected to the serial port
•Endurance
: 10
5
cycles/word
•Data
retention : 10 years
•S-29190A
: 1 Kbits
•S-29290A
: 2 Kbits
•S-29390A
: 4 Kbits
TI
NU
V
CC
NC
TEST
S-29190ADPΧ
S-29290ADPΧ
S-29390ADPΧ
ON
GND
SC
Figure 1
DI
n
Pin Functions
Table 1
Pin Number
Function
DIP
SOP1
3
4
5
6
7
8
1
2
Chip select input
Serial clock input
Serial data input
Serial data output
Ground
Test: Normally kept open
(can also be connected to GND or Vcc)
No Connection
Power supply
1
2
3
4
5
6
7
8
Name
CS
SK
DI
DO
GND
TEST
NC
V
CC
Seiko Instruments Inc.
OD
UC
T
8-pin SOP1
Top view
1
2
3
4
8
7
6
5
S-29190AFJΧ
S-29290AFJΧ
S-29390AFJΧ
TEST
GND
DO
DI
*
Χ
differs depending on the package type :
A : A type, (blank) : B type
See
n
Dimensions.
1
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