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PDF S-34C02B Data sheet ( Hoja de datos )
| Número de pieza | S-34C02B | |
| Descripción | 2-WIRE SERIAL E2PROM | |
| Fabricantes | Seiko | |
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www.sii-ic.com
© SII Semiconductor Corporation, 2012-2013
S-34C02B
2-WIRE SERIAL E2PROM
FOR DIMM SERIAL PRESENCE DETECT
Rev.1.0_02_U
This IC is a 2-wire serial E2PROM for DIMM Serial Presence Detect which operates with low current consumption and the
wide range operation. This IC has the capacity of 2 K-bit and the organization of 256 words × 8-bit. Page write and
sequential read are available.
This IC has hardware write protect and software write protect. Hardware write protect inhibits write to all memory area when
connecting the WP pin to VCC. Software write protect inhibits write in 50% of the lower address (address 00h to 7Fh) in all
memory area by inputting command when the WP pin is left open or connected to the GND pin.
Caution
This product is intended to use in general electronic devices such as consumer electronics, office
equipment, and communications devices. Before using the product in medical equipment or automobile
equipment including car audio, keyless entry and engine control unit, contact to SII Semiconductor
Corporation is indispensable.
Features
• Operation voltage range
Read:
1.7 V to 5.5 V
Write:
1.7 V to 5.5 V
• Operation frequency:
400 kHz max. (VCC = 1.7 V to 5.5 V)
• Write time: 5.0 ms max.
• Page write: 16 bytes / page
• Sequential read
• Noise suppression:
Schmitt trigger and noise filter on input pins (SCL, SDA)
• Write protect function during low power supply voltage
• Endurance: 106 cycle / word*1 (Ta = +25°C)
• Data retention: 100 years (Ta = +25°C)
• Memory capacity:
2 K-bit
• Initial delivery state:
FFh
• Operation temperature range: Ta = −40°C to +85°C
• Write protect:
Hardware protect 100%
(addresses 00h to FFh)
Software protect for the lower address of 50%
(addresses 00h to 7Fh)
• Lead-free (Sn 100%), halogen-free
*1. For each address (Word: 8-bit)
Package
• DFN-8(2030)
5
84
1
1
1 page  
Rev.1.0_02_U
2-WIRE SERIAL E2PROM FOR DIMM SERIAL PRESENCE DETECT
S-34C02B
AC Electrical Characteristics
Table 9 Measurement Conditions
Input pulse voltage
Input pulse rising / falling time
Output reference voltage
Output load
0.2 × VCC to 0.8 × VCC
20 ns or less
0.3 × VCC to 0.7 × VCC
100 pF
Input pulse voltage
0.8 × VCC
Output reference voltage
0.7 × VCC
0.2 × VCC
0.3 × VCC
Figure 1 Input / Output Waveform during AC Measurement
Item
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
WP setup time
WP hold time
WP release setup time
WP release hold time
Bus release time
Noise suppression time
Write time
Table 10
Symbol
fSCL
tLOW
tHIGH
tAA
tDH
tSU.STA
tHD.STA
tSU.DAT
tHD.DAT
tSU.STO
tR
tF
tWS1
tWH1
tWS2
tWH2
tBUF
tI
tWR
Ta = −40°C to +85°C
VCC = 1.7 V to 5.5 V
Min. Max.
0 400
1.3 −
0.6 −
0.1 0.9
50 −
0.6 −
0.6 −
100 −
0−
0.6 −
− 0.3
− 0.3
0−
0−
0−
0−
1.3 −
− 100
− 5.0
Unit
kHz
μs
μs
μs
ns
μs
μs
ns
ns
μs
μs
μs
μs
μs
μs
μs
μs
ns
ms
5
5 Page 
Rev.1.0_02_U
2-WIRE SERIAL E2PROM FOR DIMM SERIAL PRESENCE DETECT
S-34C02B
7. Write
7. 1 Byte write
When the master sends a 7-bit device address and a 1-bit read / write instruction code set to "0", following a start
condition, this IC acknowledges it.
This IC then receives an 8-bit word address and responds with an acknowledge. After this IC receives 8-bit write
data and responds with an acknowledge, it receives a stop condition and that initiates the write cycle at the
addressed memory.
During the write cycle all operations are forbidden and no acknowledge is generated.
SW
TR
AI
R
T
DEVICE
ADDRESS
T
E
WORD ADDRESS
DATA
S
T
O
P
SDA LINE
1 0 1 0 A2 A1 A0 0 W7 W6 W5 W4 W3 W2 W1 W0 D7 D6 D5 D4 D3 D2 D1 D0
M LR A
S S/ C
B BW K
AA
CC
KK
A
C
K
Figure 9 Byte Write
11
11 Page | ||
| Páginas | Total 26 Páginas | |
| PDF Descargar | [ Datasheet S-34C02B.PDF ] | |
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