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Rev. 1.3
CMOS 2-WIRED SERIAL EEPROM
S-24C08A/16A
„ Features
The S-24C08A/16A is a series of 2-wired, low power 8K/16K-bit
EEPROMs with a wide operating range. They are organized as 1K-word
× 8-bit, 2K-word × 8-bit respectively. Each is capable of page write, and
sequential read.
The time for byte write and page write is the same, i. e., 1 msec. (max.)
during operation at 5 V ± 10%.
Low power consumption
Standby: 1.0 µA Max. (VCC=5.5 V)
Operating: 0.8 mA Max. (VCC=5.5 V f=400kHz)
0.4 mA Max. (VCC=4.5 V f=100kHz)
Wide operating voltage range
Write:
2.5 to 5.5 V
Read:
1.8 to 5.5 V
Page write
16 bytes (S-24C08A, S-24C16A)
Sequential read capable
Endurance:
105 cycles/word
Data retention:
10 years
Write protection (S-24C08A, S-24C16A)
S-24C08A:
8 kbits
S-24C16A:
16 kbits
* The data sheet of 1K/2K/4K-bit products are available.
(S-24C0XA Series)
„ Pin Assignment
8-pin DIP
Top view
8-pin SOP
Top view
A0
A1
A2
GND
1
2
3
4
8 VCC
7 WP
6 SCL
5 SDA
A0 1
A1 2
8 VCC
7 WP
A2
GND
3
4
6 SCL
5 SDA
S-24C08AFJA-zz-uuw
S-24C16AFJA-zz-uuw
S-24C08ADPA-uuw
S-24C16ADPA-uuw
„ Pin Functions
Name
Pin Number
DIP SOP
Figure 1
* Lower-case letters zz and uuw differ depending on
the packing form.
See „ Ordering Information and „ Dimensions.
Table 1
Function
A0 1 1 NC in the S-24C08A (no connection)*,
Connected to GND in the S-24C16A
A1 2 2 Connected to GND
* When in use, connect to
GND or VCC.
A2 3 3 Address input in the S-24C08A
Connected to GND in the S-24C16A
GND
4 4 Ground
SDA
5 5 Serial data input/output
SCL 6 6 Serial clock input
WP (Write Protection) pin
WP 7 7 Connected to Vcc: Protection valid
Connected to GND: Protection invalid
VCC 8 8 Power supply
Seiko Instruments Inc.
1

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CMOS 2-WIRED SERIAL EEPROM
S-24C08A/16A Series
„ Block Diagram
SCL
SDA
A2*
Start/Stop
Detector
LOAD
Serial Clock
Controller
Device Address
Comparator
COMP
LOA
IN
R/W
Address
Counter
Y Decoder
WP VCC
GND
High-Voltage Generator
X
Decoder
Data Register
EEPROM
Selector
DIN
DOUT
Data Output
ACK Output
Controller
* S-24C08A
Figure 2
„ Absolute Maximum Ratings
Table 2
Parameter
Power supply voltage
Input voltage
Output voltage
Storage temperature under bias
Storage temperature
Symbol
VCC
VIN
VOUT
Tbias
Tstg
Ratings
-0.3 to +7.0
-0.3 to VCC+0.3
-0.3 to VCC
-50 to +95
-65 to +150
Unit
V
V
V
°C
°C
2 Seiko Instruments Inc.

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CMOS 2-WIRED SERIAL EEPROM
S-24C08A/16A Series
„ Recommended Operating Conditions
Parameter
Power supply voltage
High level input voltage
Low level input voltage
Operating temperature
Symbol
VCC
VIH
VIL
Topr
Table 3
Conditions
Read Operation
Write Operation
VCC=2.5 to 5.5V
VCC=1.8 to 2.5V
VCC=2.5 to 5.5V
VCC=1.8 to 2.5V
Min.
1.8
2.5
0.7×VCC
0.8×VCC
0.0
0.0
-40
Typ.
Max.
5.5
5.5
VCC
VCC
0.3×VCC
0.2×VCC
+85
Unit
V
V
V
V
V
V
°C
„ Pin Capacitance
Parameter
Input capacitance
Input/output capacitance
Table 4
Symbol
CIN
CI / O
Conditions
VIN=0 V (SCL, A0, A1, A2, WP)
VI / O=0 V (SDA)
(Ta=25°C, f=1.0 MHz, VCC=5 V)
Min. Typ. Max. Unit
— — 10 pF
— — 10 pF
„ Endurance
Parameter
Endurance
Table 5
Symbol Min.
NW 105
Typ.
Max.
Unit
cycles/word
Seiko Instruments Inc.
3

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CMOS 2-WIRED SERIAL EEPROM
S-24C08A/16A Series
„ DC Electrical Characteristics
Parameter
Current consumption
(READ)
Current consumption
(PROGRAM)
Symbol
ICC1
ICC2
Table 6
VCC=4.5 V to 5.5 V
Min. Typ. Max.
VCC=2.5 to 4.5 V
Min. Typ. Max.
0.8
f=400kHz
0.4
f=100kHz
4.0
f=400kHz
3.5
f=100kHz
VCC=1.8 to 2.5 V
Min. Typ. Max.
0.3
f=100kHz
——
Unit
mA
mA
Parameter Symbol
Conditions
Standby current ISB VIN=VCC or GND
consumption
Input leakage
current
ILI VIN=GND to VCC
Output leakage
current
ILO VOUT=GND to VCC
IOL=3.2 mA
Low level output
voltage
VOL
IOL=1.5 mA
IOL=100 µA
Current address
retention
voltage
VAH
Table 7
VCC=4.5 V to 5.5 V
Min. Typ. Max.
— — 1.0
0.1 1.0
0.1 1.0
— — 0.4
— — 0.3
— — 0.1
1.5 5.5
VCC=2.5 to 4.5 V
Min. Typ. Max.
— — 0.6
0.1 1.0
0.1 1.0
— — 0.4
— — 0.3
— — 0.1
1.5 4.5
VCC=1.8 to 2.5 V
Min. Typ. Max.
— — 0.4
0.1 1.0
0.1 1.0
———
— — 0.5
— — 0.1
1.5 2.5
Unit
µA
µA
µA
V
V
V
V
4 Seiko Instruments Inc.

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CMOS 2-WIRED SERIAL EEPROM
S-24C08A/16A Series
„ AC Electrical Characteristics
VCC
Table 8 Measurement Conditions
Input pulse voltage
Input pulse rising/falling time
Output judgment voltage
Output load
0.1×VCC to 0.9×VCC
20 ns
0.5×VCC
100 pF+ Pullup resistance 1.0 k
SDA
R=1.0k
C=100pF
Figure 3 Output Load Circuit
Parameter
SCL clock frequency
SCL clock time "L"
SCL clock time"H"
SDA output delay time
SDA output hold time
Start condition setup time
Start condition hold time
Data input setup time
Data input hold time
Stop condition setup time
SCL · SDA rising time
SCL · SDA falling time
Bus release time
Noise suppression time
Table 9
Symbol
fSCL
tLOW
tHIGH
tAA
tDH
tSU.STA
tHD.STA
tSU.DAT
tHD.DAT
tSU.STO
tR
tF
tBUF
tI
VCC=1.8V to 5.5V
Min. Typ. Max.
0 100
4.7 — —
4.0 — —
0.3 3.5
0.3 — —
4.7 — —
4.0 — —
100 — —
0 ——
4.7 — —
— — 1.0
— — 0.3
4.7 — —
— — 100
VCC=4.5V to 5.5V
Min. Typ. Max.
0 400
1.3 — —
0.6 — —
0.3 1.0
0.3 — —
0.6 — —
0.6 — —
50 — —
0 ——
0.6 — —
— — 0.3
— — 0.3
1.3 — —
— — 100
Unit
kHz
µs
µs
µs
µs
µs
µs
ns
ns
µs
µs
µs
µs
ns
SCL
SDA IN
tSU.STA
SDA OUT
tF tHIGH
tLOW
tHD.STA
tHD.DAT
tSU.DAT
tAA tDH
Figure 4 Bus Timing
tR
tSU.STO
tBUF
Seiko Instruments Inc.
5