Contents
Features .............................................................................................. 1
Pin Assignment .................................................................................... 1
Pin Functions ....................................................................................... 1
Block Diagram ..................................................................................... 2
Instruction Set...................................................................................... 2
Absolute Maximum Ratings.................................................................. 2
Recommended Operating Conditions .................................................. 2
Pin Capacitance................................................................................... 3
Endurance ........................................................................................... 3
DC Characteristics ............................................................................... 3
AC Characteristics ............................................................................... 4
Operation ............................................................................................. 5
Receiving a Start-Bit ............................................................................ 7
Three-wire Interface
(DI-DO direct connection) .................................................................... 7
Connecting to the CPU with a Serial Port............................................. 8
Memory Protection............................................................................... 8
Ordering Information ............................................................................ 9
Characteristics ..................................................................................... 10
Dimensions (Unit : mm) ....................................................................... 15
Rev.1.11
CMOS SERIAL E
2
PROM
S-29UX94A Series
The S-29UX94A Series is low power 1K/2K/4K-bit serial E
2
PROMs with a
low 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-29UX94A 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 : 2.0
µA
Max. (V
CC
=3.6 V)
Operating : 0.6 mA Max. (V
CC
=3.6 V)
0.4 mA Max. (V
CC
=2.7 V)
Low operating voltage range
Write
: 1.8 to 3.6 V
Read
: 0.9 to 3.6 V
Sequential read capable
Memory Protection
•
•
•
•
•
•
•
Can be easily connected to the serial port
CS Active "L"
Endurance : 10
5
cycles/word
Data retention : 10 years
S-29U194A : 1 Kbits
S-29U294A : 2 Kbits
S-29U394A : 4 Kbits
•
•
•
Package
8-pin SOP
8-pin SSOP
(PKG drawing code :FE008-A)
(PKG drawing code :FS008-A)
Pin Assignment
8-pin SOP2
Top view
CS
SK
DI
DO
1
2
3
4
8
7
6
5
8-pin SSOP
Top view
VCC
NC
PROTECT
GND
CS
SK
DI
DO
1
2
3
4
8
7
6
5
VCC
NC
PROTECT
GND
S-29U194ADFE
S-29U294ADFE
S-29U394ADFE
S-29U194AFS
S-29U294AFS
S-29U394AFS
* See
Dimensions
Figure 1
Table 1
Name
CS
SK
DI
DO
GND
PROTECT
NC
VCC
Pin Number
SOP2 SSOP
1
1
2
2
3
3
4
4
5
5
6
7
8
6
7
8
Function
Chip select input
Serial clock input
Serial data input
Serial data output
Ground
Memory Protection Control Input
Connected to GND or Open : Protection Valid
Connected to Vcc
: Protection Invalid
No Connection
Power supply
Seiko Instruments Inc.
1
CMOS SERIAL E
2
PROM
S-29UX94A Series
n
Block Diagram
Memory array
PROTECT
Write Protection
Circuit
Bank 1*
Bank 2
Address
decoder
V
CC
GND
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
n
Instruction Set
Table 2
Start
Bit
1
1
1
1
Ope
code
1000xxx
x100xxx
0011xxx
0000xxx
S-29U194A
xx A5toA0
xx A5toA0
xxxxxxxx
xxxxxxxx
Address
S-29U294A
x A6toA0
x A6toA0
xxxxxxxx
xxxxxxxx
S-29U394A
A7toA0
A7toA0
xxxxxxxx
xxxxxxxx
Instruction
READ
(Read data)
(Program data)
Data
D
15
to D
0
Output*
D
15
to D
0
Input
PROGRAM
PEN
PDS
(Program enable)
(Program disable)
x :
* :
Doesn’t matter.
When 16-bit data of the specified address is output, the data of the next address is output.
n
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
n
Recommended Operating Conditions
Table 4
Parameter
Power supply voltage
Symbol
V
CC
Conditions
Read Operation
Write Enable/Disable
Write Operation
High level input voltage
V
IH
V
CC
=1.8 to 3.6V
V
CC
=0.9 to 1.8V
V
CC
=1.8 to 3.6V
V
CC
=0.9 to 1.8V
Min.
0.9
1.8
0.8
×
V
CC
0.9
×
V
CC
0.0
0.0
-40
Typ.
Max.
3.6
3.6
V
CC
V
CC
0.2
×
V
CC
0.1
×
V
CC
+85
Unit
V
V
V
V
V
V
°C
Low level input voltage
Operating temperature
V
IL
T
opr
2
Seiko Instruments Inc.
CMOS SERIAL E
2
PROM
S-29UX94A Series
n
Pin Capacitance
Table 5
(Ta=25°C, f=1.0 MHz, V
CC
=5 V)
Parameter
Input Capacitance
Output Capacitance
Symbol
C
IN
C
OUT
Conditions
V
IN
=0 V
V
OUT
=0 V
Min.
Typ.
Max.
8
10
Unit
pF
pF
n
Endurance
Table 6
Parameter
Endurance
Symbol
N
W
Min.
10
5
Typ.
Max.
Unit
cycles/word
n
DC Electrical Characteristics
Table 7
Parameter
Current consumption
(READ)
Current consumption
(PROGRAM)
Smbl
I
CC1
I
CC2
Conditions
DO unloaded
DO unloaded
V
CC
=2.7 V to 3.6 V V
CC
=1.8 V to 2.7 V V
CC
=0.9 to 1.8 V
Min. Typ. Max. Min. Typ. Max. Min. Typ.
0.6
1.5
0.4
1.0
Max.
0.2
mA
mA
Unit
Table 8
Parameter
Smbl
Conditions
CS=VCC DO=Open
Other input: Connected
to V
CC
or GND
Topr=-10 to +70°C
CS=VCC DO=Open
Other input: Connected
to V
CC
or GND
Topr=-40 to +85°C
Input leakage
current
Output leakage
current
Low level output
voltage
High level output
voltage
Write enable latch
data hold voltage
Pull-Down Current
V
OH
V
DH
V
OL
I
LI
I
LO
V
IN
=GND to V
CC
V
OUT
=GND to V
CC
I
OL
=100
µA
I
OL
=30
µA
I
OL
=10
µA
I
OH
=-100
µA
I
OH
=-10
µA
I
OH
=-5
µA
Only when write disable
mode
PROTECT Terminal=V
CC
V
CC
=2.7 V to 3.6 V
Min.
Typ. Max.
V
CC
=1.8 to 2.7 V
Min.
Typ. Max.
V
CC
=0.9 to 1.8 V
Min.
Typ. Max.
Unit
Standby current
consumption
1.0
1.0
1.0
µA
I
SB
2.0
2.0
2.0
µA
V
CC
-0.7
V
CC
-0.7
V
CC
-0.7
0.8
4
0.1
0.1
1.0
1.0
0.1
0.1
0.1
30
V
CC
-0.3
V
CC
-0.3
0.8
1
0.1
0.1
1.0
1.0
0.1
0.1
0.1
15
0.1
0.1
1.0
1.0
µA
µA
V
V
0.2
V
V
V
V
CC
-0.2
0.8
0.05
5
V
V
µA
I
PD
Seiko Instruments Inc.
3
CMOS SERIAL E
2
PROM
S-29UX94A Series
n
AC Characteristics
Table 9 Measuring conditions
Input pulse voltage
Output reference voltage
Output load
0.1 x V
CC
to 0.9 x V
CC
0.5 x V
CC
100pF
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
Topr=-10 to +70°C
Topr=-40 to +85°C
Topr=-10 to +70°C
Topr=-40 to +85°C
Topr=-10 to +70°C
Topr=-40 to +85°C
Conditions
V
CC
=2.7 to 3.6V
4.0
1.0
1.0
500
500
0.5
0.5
10.0
V
CC
=1.8 to 2.7 V
4.0
2.0
2.0
250
250
1.0
1.0
10.0
V
CC
=0.9 to 1.8V
50
100
10
5
50
50
Unit
µs
µs
µs
µs
µs
µs
µs
kHz
kHz
µs
µs
µs
µs
ms
Min. Typ. Max. Min. Typ. Max. Min. Typ. Max.
0.4
0.4
0.2
0.4
0.4
0
0
1.0
1.0
0
0
1.0
1.0
0.4
0.8
0.8
0
0
2.0
2.0
0
0
10
10
4
8
8
50
100
0
0
t
CSS
CS
t
SKH
SK
t
SKL
t
CSH
t
CDS
t
DS
t
DH
t
DS
t
DH
DI
Hi-Z
DO
(READ)
DO
(VERIFY)
Hi-Z
t
SV
Valid data
t
PD
Valid data
t
PD
Hi-Z
t
HZ2
t
HZ1
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
Figure 4 Timing Chart for t
CSS
and t
CSH
when SK is "H"
t
CSH
4
Seiko Instruments Inc.
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