Rev.1.2
_20
CMOS SERIAL E
2
PROM
S-29X94A Series
The S-29X94A 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 in 16-bit blocks.
The S-29X94A Series is capable of protecting the memory, 50
%
of which
can be protected starting from address 00.
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.
Features
•
Low power consumption
Standby
: 1.0
µ
A Max. (V
CC
=6.5
V)
0.4 mA Max. (V
CC
=2.5
V)
•
Wide operating voltage range
Write
Read
:2.5 to 6.5 V
:1.8 to 6.5 V
Operating : 0.8 mA Max. (V
CC
=5.5
V)
•
Can be easily connected to the serial port
•
CS Active "L"
•
Endurance : 10
5
cycles/word
•
Data retention : 10 years
•
S-29194A : 1 Kbits
•
S-29294A : 2 Kbits
•
S-29394A : 4 Kbits
•
Sequential read capable
•
Memory Protection
Package
8-Pin DIP
8-Pin SOP
(PKG drawing code : DP008-A)
(PKG drawing code : FJ008-A)
Pin Assignment
8-Pin DIP
Top view
CS
SK
DI
DO
1
2
3
4
8
7
6
5
S-29194ADPA
S-29294ADPA
S-29394ADPA
VCC
NC
PROTECT
GND
NC
VCC
CS
SK
8-Pin SOP1
Top view
1
2
3
4
8
7
6
5
PROTECT
GND
DO
DI
S-29194AFJA
S-29294AFJA
S-29394AFJA
Figure 1
Seiko Instruments Inc.
1
CMOS SERIAL E
2
PROM
S-29X94A Series
Pin Functions
Table 1
Pin Number
Name
DIP
CS
SK
DI
DO
GND
PROTECT
1
2
3
4
5
6
SOP1
3
4
5
6
7
8
Chip select input
Serial clock input
Serial data input
Serial data output
Ground
Function
Memory Protection Control Input
Connected to GND or Open : Protection Valid
Connected to Vcc
: Protection Invalid
NC
VCC
7
8
1
2
No Connection
Power supply
Block Diagram
Memory array
Write Protection
Circuit
Bank 1*
Bank 2
Address
decoder
VCC
GND
PROTECT
Data register
DI
Mode decode
logic
Output buffer
DO
CS
SK
Clock generator
*50
%
of the memory can be protected starting from address 00.
Figure 2
Instruction Set
Table 2
Start
Instruction
READ (Read data)
PROGRAM (Program data)
WRAL (Write all)
ERAL (Erase all)
PEN
PDS
(Program enable)
(Program disable)
Bit
1
1
1
1
1
1
Ope
code
1000xxx
x100xxx
0001xxx
0010xxx
0011xxx
0000xxx
S-29194A
xx A5toA0
xx A5toA0
xxxxxxxx
xxxxxxxx
xxxxxxxx
xxxxxxxx
Address
Data
S-29294A
x A6toA0
x A6toA0
xxxxxxxx
xxxxxxxx
xxxxxxxx
xxxxxxxx
S-29394A
A7toA0
A7toA0
xxxxxxxx
xxxxxxxx
xxxxxxxx
xxxxxxxx
D
15
to D
0
Output*
D
15
to D
0
Input
D
15
to D
0
Input
—
—
—
x : Doesn't matter.
* : When 16-bit data of the specified address is output, the data of the next address is output.
2
Seiko Instruments Inc.
CMOS SERIAL E
2
PROM
S-29X94A Series
Absolute Maximum Ratings
Table 3
Parameter
Power supply voltage
Input voltage
Output voltage
Storage temperature under bias
Storage temperature
Symbol
V
CC
V
IN
V
OUT
T
bias
T
stg
Ratings
−0.3
to
+7.0
−0.3
to V
CC
+0.3
−0.3
to V
CC
−50
to
+95
−65
to
+150
Unit
V
V
V
°C
°C
Caution The absolute maximum ratings are rated values exceeding which
the product could suffer physical damage. These values must
therefore not be exceeded under any conditions.
Recommended Operating Conditions
Table 4
Parameter
Symbol
Conditions
Read Operation
Power supply voltage
V
CC
Write Enable/Disable
Write Operation
V
CC
=5.5
to 6.5 V
V
CC
=4.5
to 5.5 V
High level input voltage
V
IH
V
CC
=2.7
to 4.5 V
V
CC
=1.8
to 2.7 V
V
CC
=5.5
to 6.5 V
V
CC
=4.5
to 5.5 V
Low level input voltage
V
IL
V
CC
=2.7
to 4.5 V
V
CC
=1.8
to 2.7 V
Operating temperature
T
opr
—
Min.
1.8
2.5
0.8×Vcc
2.0
0.8×Vcc
0.8×Vcc
0.0
0.0
0.0
0.0
−40
Typ.
—
—
—
—
—
—
—
—
—
—
—
Max.
6.5
6.5
Vcc
Vcc
Vcc
Vcc
0.2×Vcc
0.8
0.2×Vcc
0.15×Vcc
+85
Unit
V
V
V
V
V
V
V
V
V
V
°C
Pin Capacitance
Table 5
Parameter
Input Capacitance
Output Capacitance
Symbol
C
IN
C
OUT
Conditions
V
IN
=0
V
V
OUT
=0
V
Min.
—
—
(Ta=25°C, f=1.0 MHz, V
CC
=5
V)
Typ.
—
—
Max.
8
10
Unit
pF
pF
Endurance
Table 6
Parameter
Endurance
Symbol
N
W
Min.
10
5
Typ.
—
Max.
—
Unit
cycles/word
Seiko Instruments Inc.
3
CMOS SERIAL E
2
PROM
S-29X94A Series
DC Characteristics
Table 7
Parameter
Current
consumption
(READ)
Current
consumption
(PROGRAM)
I
CC2
I
CC1
Smbl
Conditions
V
CC
=5.5
to 6.5 V
Min.
DO
unloaded
DO
unloaded
Typ.
Max.
1.0
V
CC
=4.5
to 5.5 V
Min.
Typ.
Max.
0.8
V
CC
=2.5
to 4.5 V
Min.
Typ.
Max.
0.6
V
CC
=1.8
to 2.5 V
Min.
Typ.
Max.
0.4
mA
Unit
—
—
—
—
—
—
—
—
—
—
2.5
—
—
2.0
—
—
1.5
—
—
—
mA
Table 8
Parameter
Standby current
consumption
Input leakage current
Output leakage
current
Low level output
voltag
High level output
voltage
Write enable latch
data hold voltage
Pull-down current
Smbl
Conditions
CS=V
CC
DO=Open
I
SB
I
LI
I
LO
Other input: Connected to
V
CC
or GND
V
IN
=GND
to V
CC
V
OUT
=GND
to V
CC
I
OL
=2.1
mA
V
OL
I
OL
=100 µA
I
OH
=−400 µA
V
OH
I
OH
=−100 µA
I
OH
=−10 µA
V
DH
I
PD
Only when program disable
mode
PROTECT terminal
=
Vcc
V
CC
=4.5
to 6.5 V
Min.
Typ. Max.
V
CC
=2.5
to 4.5 V
Min.
Typ. Max.
V
CC
=1.8
to 2.5 V
Min.
Typ.
Max.
0.4
1.0
1.0
Unit
—
—
—
—
—
2.4
V
CC
−
0.7
V
CC
−
0.7
1.5
15
—
0.1
0.1
1.0
1.0
1.0
0.45
0.1
—
—
—
—
—
—
V
CC
−
0.7
V
CC
−
0.7
1.5
3
—
0.1
0.1
0.6
1.0
1.0
—
—
—
—
—
—
—
V
CC
−
0.3
1.5
1
—
0.1
0.1
µA
µA
µA
V
V
V
V
V
V
µA
—
—
—
—
—
—
—
—
—
—
—
100
—
—
—
—
—
—
—
—
0.1
—
—
—
—
50
—
—
—
—
—
—
—
—
0.1
—
—
—
—
10
4
Seiko Instruments Inc.
CMOS SERIAL E
2
PROM
S-29X94A Series
AC Characteristics
Table 9 Measuring conditions
Input pulse voltage
Output reference voltage
Output load
0.1
×
V
CC
to 0.9
×
V
CC
0.5
×
V
CC
100 pF
Table 10
Parameter
CS setup time
CS hold time
CS deselect time
Data setup time
Data hold time
Output delay time
Clock frequency
Clock pulse width
Output disable time
Output enable time
Programming time
Smbl
t
CSS
t
CSH
t
CDS
t
DS
t
DH
t
PD
f
SK
t
SKH
t
SKL
t
HZ1
t
HZ2
t
SV
t
PR
t
CSS
CS
t
SKH
SK
t
DS
DI
Hi-Z
DO
t
SV
(READ)
Hi-Z
DO
(VERIFY)
t
HZ2
t
HZ1
Hi-Z
t
DH
t
DS
t
DH
t
SKL
t
CSH
V
CC
=4.5
to 6.5V
0.2
0.2
0.2
0.2
0.2
V
CC
=2.5
to 4.5 V
0.4
0.4
0.2
0.4
0.4
V
CC
=1.8
to 2.5V
1.0
1.0
0.4
0.8
0.8
Unit
µs
µs
µs
µs
µs
µs
Min. Typ. Max. Min. Typ. Max. Min. Typ. Max.
—
0
0.25
0
0
—
—
—
—
—
—
—
—
—
—
4.0
—
—
—
—
—
0.4
2.0
—
0
1.0
0
0
—
—
—
—
—
—
—
—
—
—
4.0
—
—
—
—
—
1.0
0.5
—
—
2.0
0
0
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
2.0
0.25 MHz
—
0.15
0.15
10.0
—
0.5
0.5
10.0
—
1.0
1.0
µs
µs
µs
ms
t
CDS
—
—
—
—
Valid data
Valid data
t
PD
t
PD
Hi-Z
Input data is retrieved on the rising edge of SK.
Output data is triggered on the falling edge of SK.
Figure 3 Timing Chart
CS
t
CSS
SK
t
CSH
Figure 4 Timing Chart for t
CSS
and t
CSH
when SK is "H"
Seiko Instruments Inc.
5
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
