RENESAS R1EX24002ATAS0I

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April 1st, 2010
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Issued by: Renesas Electronics Corporation (http://www.renesas.com)
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1.
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R1EX24002ASAS0I
R1EX24002ATAS0I
Two-wire serial interface
2k EEPROM (256-word × 8-bit)
REJ03C0355-0100
Rev.1.00
Oct.26, 2009
Description
R1EX24xxx series are two-wire serial interface EEPROM (Electrically Erasable and Programmable
ROM). They realize high speed, low power consumption and a high level of reliability by employing
advanced MONOS memory technology and CMOS process and low voltage circuitry technology. They
also have a 16-byte page programming function to make their write operation faster.
Features
•
•
•
•
•
•
•
•
•
•
•
•
Single supply: 1.8 V to 5.5 V
Two-wire serial interface (I2C serial bus)
Clock frequency: 400 kHz
Power dissipation:
 Standby: 2 µA (max)
 Active (Read): 1 mA (max)
 Active (Write): 2.5 mA (max)
Automatic page write: 16-byte/page
Write cycle time: 5 ms
Endurance: 1,000k cycles @25°C
Data retention: 100 Years @25°C
Small size packages: SOP-8pin, TSSOP-8pin
Shipping tape and reel
 TSSOP 8-pin: 3,000 IC/reel
 SOP 8-pin: 2,500 IC/reel
Temperature range: −40 to +85°C
Lead free products.
REJ03C0355-0100
Page 1 of 22
Rev.1.00
Oct. 26, 2009
R1EX24002AxxS0I
Ordering Information
Type No.
Internal
organization
Operating voltage Frequency
Package
R1EX24002ASAS0I
2k bit
(256 × 8-bit)
1.8 V to 5.5 V
400 kHz
150 mil 8-pin plastic SOP
PRSP0008DF-B
(FP-8DBV)
Lead free
R1EX24002ATAS0I
2k bit
(256 × 8-bit)
1.8 V to 5.5 V
400 kHz
8-pin plastic TSSOP
PTSP0008JC-B
(TTP-8DAV)
Lead free
Pin Arrangement
8-pin SOP /8-pin TSSOP
A0
1
8
VCC
A1
2
7
WP
A2
3
6
SCL
VSS
4
5
SDA
(Top view)
Pin Description
Pin name
Function
A0 to A2
Device address
SCL
Serial clock input
SDA
Serial data input/output
WP
Write protect
VCC
Power supply
VSS
Ground
REJ03C0355-0100 Rev.1.00 Oct. 26, 2009
Page 2 of 22
R1EX24002AxxS0I
Block Diagram
High voltage generator
Control
logic
A0, A1, A2
SCL
X decoder
WP
Address generator
VSS
Memory array
Y decoder
VCC
Y-select & Sense amp.
SDA
Serial-parallel converter
Absolute Maximum Ratings
Parameter
Symbol
Value
Supply voltage relative to VSS
VCC
−0.6 to +7.0
Vin
2
−0.5* to +7.0*
V
Operating temperature range*
Topr
−40 to +85
°C
Storage temperature range
Tstg
−55 to +125
°C
Input voltage relative to VSS
1
Unit
V
3
Notes: 1. Including electrical characteristics and data retention.
2. Vin (min): −3.0 V for pulse width ≤ 50 ns.
3. Should not exceed VCC + 1.0 V.
DC Operating Conditions
Parameter
Symbol
Min
Typ
Max
Unit
Supply voltage
VCC
1.8

5.5
V
VSS
0
0
0
V
Input high voltage
VIH
VCC × 0.7

VCC + 0.5
V
Input low voltage
VIL
−0.3*1

VCC × 0.3
V
Operating temperature
Topr
−40

+85
°C
Notes: 1. VIL (min): −1.0 V for pulse width ≤ 50 ns.
REJ03C0355-0100 Rev.1.00 Oct. 26, 2009
Page 3 of 22
R1EX24002AxxS0I
DC Characteristics (Ta = −40 to +85°C, VCC = 1.8 V to 5.5 V)
Parameter
Symbol Min
Typ
Max
Unit
Test conditions
Input leakage current
ILI


2.0
µA
VCC = 5.5 V, Vin = 0 to 5.5 V
Output leakage current
ILO


2.0
µA
VCC = 5.5 V, Vout = 0 to 5.5 V
Standby VCC current
ISB

1.0
2.0
µA
Vin = VSS or VCC
Read VCC current
ICC1


1.0
mA
VCC = 5.5 V, Read at 400 kHz
Write VCC current
ICC2


2.5
mA
VCC = 5.5 V, Write at 400 kHz
Output low voltage
VOL2


0.4
V
VCC = 2.7 to 5.5 V, IOL = 3.0 mA
VOL1


0.2
V
VCC = 1.8 to 2.7 V, IOL = 1.5 mA
Capacitance (Ta = +25°C, f = 1 MHz)
Parameter
Symbol
Min
Typ
Max
Unit
Test
conditions
Input capacitance (A0 to A2, SCL, WP) Cin*1


6.0
pF
Vin = 0 V
CI/O*1


6.0
pF
Vout = 0 V
Output capacitance (SDA)
Note:
1. Not 100% tested.
Memory cell characteristics (VCC = 1.8 V to 5.5 V)
Ta=25°C
Ta=85°C
Notes
Endurance
1,000k Cycles min.
100k Cycles min
1
Data retention
100 Years min.
10 Years min.
1
Note:
1. Not 100% tested.
REJ03C0355-0100 Rev.1.00 Oct. 26, 2009
Page 4 of 22
R1EX24002AxxS0I
AC Characteristics (Ta = −40 to +85°C, VCC = 1.8 to 5.5 V)
Test Conditions
• Input pules levels:
 VIL = 0.2 × VCC
 VIH = 0.8 × VCC
• Input rise and fall time: ≤ 20 ns
• Input and output timing reference levels: 0.5 × VCC
• Output load: TTL Gate + 100 pF
Parameter
Symbol
Min
Typ
Max
Unit
Clock frequency
fSCL


400
kHz
Clock pulse width low
tLOW
1200


ns
Clock pulse width high
tHIGH
600


ns
Noise suppression time
tI


50
ns
Access time
tAA
100

900
ns
Bus free time for next mode
tBUF
1200


ns
Notes
1
Start hold time
tHD.STA
600


ns
Start setup time
tSU.STA
600


ns
Data in hold time
tHD.DAT
0


ns
Data in setup time
tSU.DAT
100


ns
Input rise time
tR


300
ns
1
Input fall time
tF


300
ns
1
Stop setup time
tSU.STO
600


ns
Data out hold time
tDH
50


ns
Write protect hold time
tHD.WP
1200


ns
Write protect setup time
tSU.WP
0


ns
Write cycle time
tWC


5
ms
Notes: 1. Not 100% tested.
2. tWC is the time from a stop condition to the end of internally controlled write cycle.
REJ03C0355-0100 Rev.1.00 Oct. 26, 2009
Page 5 of 22
2
R1EX24002AxxS0I
Timing Waveforms
Bus Timing
tF
tHIGH
1/fSCL
tLOW
tR
SCL
tSU.STA
tHD.DAT
tSU.DAT
tHD.STA
tSU.STO
SDA
(in)
tBUF
tAA
tDH
SDA
(out)
tSU.WP
tHD.WP
WP
Write Cycle Timing
Stop condition
Start condition
SCL
SDA
D0 in
Write data
(Address (n))
ACK
REJ03C0355-0100 Rev.1.00 Oct. 26, 2009
Page 6 of 22
tWC
(Internally controlled)
R1EX24002AxxS0I
Pin Function
Serial Clock (SCL)
The SCL pin is used to control serial input/output data timing. The SCL input is used to positive edge
clock data into EEPROM device and negative edge clock data out of each device. Maximum clock rate is
400 kHz.
Serial Input/Output Data (SDA)
The SDA pin is bidirectional for serial data transfer. The SDA pin needs to be pulled up by resistor as that
pin is open-drain driven structure. Use proper resistor value for your system by considering VOL, IOL and
the SDA pin capacitance. Except for a start condition and a stop condition which will be discussed later,
the SDA transition needs to be completed during the SCL low period.
Data Validity (SDA data change timing waveform)
SCL
SDA
Data
change
Note:
Data
change
High-to-low and low-to-high change of SDA should be done during the SCL low period.
REJ03C0355-0100 Rev.1.00 Oct. 26, 2009
Page 7 of 22
R1EX24002AxxS0I
Device Address (A0, A1, A2)
Eight devices can be wired for one common data bus line as maximum. Device address pins are used to
distinguish each device and device address pins should be connected to VCC or VSS . When device address
code provided from SDA pin matches corresponding hard-wired device address pins A0 to A2, that one
device can be activated.
These pins are internally pulled-down to VSS. The device reads these pins as Low if unconnected.
Pin Connections for A0 to A2
Pin connection
Max connect
Memory size number
A2
A1
A0
2k bit
VCC/VSS
VCC/VSS
VCC/VSS
Note:
8
Note
1. During floating, “VCC/VSS” are fixed to VSS.
Write Protect (WP)
When the Write Protect pin (WP) is high, the write protection feature is enabled and operates as shown in
the following table.
Also, acknowledgment "0" is outputted after inputting device address and memory address. After
inputting write data, acknowledgment "1""(NO ACK) is outputted.
When the WP is low, write operation for all memory arrays are allowed. The read operation is always
activated irrespective of the WP pin status.
The WP pin is internally pulled-down to VSS. Write operations for all memory array are allowed if
unconnected.
Write Protect Area
Write protect area
WP pin status
2k bit
VIH
Full (2k bit)
VIL
Normal read/write operation
REJ03C0355-0100 Rev.1.00 Oct. 26, 2009
Page 8 of 22
R1EX24002AxxS0I
Functional Description
Start Condition
A high-to-low transition of the SDA with the SCL high is needed in order to start read, write operation
(See start condition and stop condition).
Stop Condition
A low-to-high transition of the SDA with the SCL high is a stop condition. The stand-by operation starts
after a read sequence by a stop condition. In the case of write operation, a stop condition terminates the
write data inputs and place the device in a internally-timed write cycle to the memories. After the
internally-timed write cycle which is specified as tWC, the device enters a standby mode (See write cycle
timing).
Start Condition and Stop Condition
SCL
SDA
(in)
Start condition
REJ03C0355-0100 Rev.1.00 Oct. 26, 2009
Page 9 of 22
Stop condition
R1EX24002AxxS0I
Acknowledge
All addresses and data words are serially transmitted to and from in 8-bit words. The receiver sends a
zero to acknowledge that it has received each word. This happens during ninth clock cycle. The
transmitter keeps bus open to receive acknowledgment from the receiver at the ninth clock. In the write
operation, EEPROM sends a zero to acknowledge after receiving every 8-bit words. In the read operation,
EEPROM sends a zero to acknowledge after receiving the device address word. After sending read data,
the EEPROM waits acknowledgment by keeping bus open. If the EEPROM receives zero as an
acknowledge, it sends read data of next address. If the EEPROM receives acknowledgment "1" (no
acknowledgment) and a following stop condition, it stops the read operation and enters a stand-by mode.
If the EEPROM receives neither acknowledgment "0" nor a stop condition, the EEPROM keeps bus open
without sending read data.
Acknowledge Timing Waveform
SCL
1
SDA IN
SDA OUT
REJ03C0355-0100 Rev.1.00 Oct. 26, 2009
Page 10 of 22
2
8
9
Acknowledge
out
R1EX24002AxxS0I
Device Addressing
The EEPROM device requires an 8-bit device address word following a start condition to enable the chip
for a read or a write operation. The device address word consists of 4-bit device code, 3-bit device
address code and 1-bit read/write(R/W) code. The most significant 4-bit of the device address word are
used to distinguish device type and this EEPROM uses “1010” fixed code. The device address word is
followed by the 3-bit device address code A2, A1,A0 . The device address code selects one device out of
eight devices which are connected to the bus. This means that the device is selected if the inputted 3-bit
device address code is equal to the corresponding hard-wired A2 to A0 pins status. The eighth bit of the
device address word is the read/write(R/W) bit. A write operation is initiated if this bit is “0” and a read
operation is initiated if this bit is “1” . The EEPROM turns to a stand-by state if the device code is not
“1010” or device address code doesn’t coincide with status of the correspond hard-wired device address
pins.
Device Address Word
Device address word (8-bit)
Device code (fixed)
2k
Note:
1
0
R/W code*1
Device address code
1
0
1. R/W=“1” is read and R/W = “0” is write.
REJ03C0355-0100 Rev.1.00 Oct. 26, 2009
Page 11 of 22
A2
A1
A0
R/W
R1EX24002AxxS0I
Write Operations(WP=Low)
Byte Write: (Write operation during WP=Low status)
A write operation requires an 8-bit device address word with R/W = “0”. Then the EEPROM sends
acknowledgment "0" at the ninth clock cycle. After these, the 2k bit EEPROM receives 8-bit memory
address words. Upon receipt of this memory address, the EEPROM outputs acknowledgment "0" and
receives a following 8-bit write data. After receipt of write data, the EEPROM outputs acknowledgment
"0". If the EEPROM receives a stop condition, the EEPROM enters an internally-timed write cycle and
terminates receipt of SCL, SDA inputs until completion of the write cycle. The EEPROM returns to a
standby mode after completion of the write cycle.
Byte Write Operation
WP
Start
1010
W
ACK
R/W
REJ03C0355-0100 Rev.1.00 Oct. 26, 2009
Page 12 of 22
Write data (n)
D7
D6
D5
D4
D3
D2
D1
D0
2k
Memory
address
a7
a6
a5
a4
a3
a2
a1
a0
Device
address
ACK
ACK
Stop
R1EX24002AxxS0I
Page Write:
The EEPROM is capable of the page write operation which allows any number of bytes up to 16 bytes to
be written in a single write cycle. The page write is the same sequence as the byte write except for
inputting the more write data. The page write is initiated by a start condition, device address word,
memory address(n) and write data (Dn) with every ninth bit acknowledgment. The EEPROM enters the
page write operation if the EEPROM receives more write data (Dn+1) instead of receiving a stop
condition. The a0 to a3 address bits are automatically incremented upon receiving write data (Dn+1).
The EEPROM can continue to receive write data up to 16 bytes. If the a0 to a3 address bits reaches the
last address of the page, the a0 to a3 address bits will roll over to the first address of the same page and
previous write data will be overwritten. Upon receiving a stop condition, the EEPROM stops receiving
write data and enters internally-timed write cycle.
Page Write Operation
WP
Start
W
ACK
R/W
REJ03C0355-0100 Rev.1.00 Oct. 26, 2009
Page 13 of 22
ACK
Write data (n+m)
D5
D4
D3
D2
D1
D0
1010
Write data (n)
D7
D6
D5
D4
D3
D2
D1
D0
2k
Memory
address
a7
a6
a5
a4
a3
a2
a1
a0
Device
address
ACK
ACK
Stop
R1EX24002AxxS0I
Write Operations(WP=High)
Byte Write: (Write operation during WP=High status)
A write operation requires an 8-bit device address word with R/W = “0”. Then the EEPROM sends
acknowledgment "0" at the ninth clock cycle. After these, the 2k bit EEPROM receives 8-bit memory
address. Upon receipt of this memory address, the EEPROM outputs acknowledgment "0". After receipt
of 8-bit write data, the EEPROM outputs acknowledgment "1"(NO ACK). Then the EEPROM write
operations are not allowed.
Byte Write Operation
WP
Start
1010
Write data (n)
W
ACK
R/W
REJ03C0355-0100 Rev.1.00 Oct. 26, 2009
Page 14 of 22
ACK
No ACK
D7
D6
D5
D4
D3
D2
D1
D0
2k
Memory
address
a7
a6
a5
a4
a3
a2
a1
a0
Device
address
Stop
R1EX24002AxxS0I
Page Write:
The page write is the same sequence as the byte write. The page write is initiated by a start condition,
device address word and memory address(n) with every ninth bit acknowledgment"0". But after inputting
write data(Dn) , the EEPROM outputs acknowledgment "1"(NO ACK). Then the EEPROM write
operations are not allowed.
Page Write Operation
WP
Start
W
ACK
R/W
REJ03C0355-0100 Rev.1.00 Oct. 26, 2009
Page 15 of 22
No ACK
No ACK
Write data (n+m)
D5
D4
D3
D2
D1
D0
1010
Write data (n)
D7
D6
D5
D4
D3
D2
D1
D0
2k
Memory
address
a7
a6
a5
a4
a3
a2
a1
a0
Device
address
ACK
Stop
R1EX24002AxxS0I
Acknowledge Polling:
Acknowledge polling feature is used to show if the EEPROM is in a internally-timed write cycle or not.
This feature is initiated by the stop condition after inputting write data. This requires the 8-bit device
address word following the start condition during a internally-timed write cycle. Acknowledge polling
will operate when the R/W code = “0”. Acknowledgment “1” (no acknowledgment) shows the EEPROM
is in a internally-timed write cycle and acknowledgment “0” shows that the internally-timed write cycle has
completed. See Write Cycle Polling using ACK.
Write Cycle Polling Using ACK
Send
write command
Send
stop condition
to initiate write cycle
Send
start condition
Send
device address word
with R/W = 0
ACK
returned
No
Yes
Next operation is
addressing the memory
No
Yes
Proceed write operation
Send
memory address
Send
start condition
Proceed random address
read operation
Send
stop condition
REJ03C0355-0100 Rev.1.00 Oct. 26, 2009
Page 16 of 22
Send
stop condition
R1EX24002AxxS0I
Read Operation
There are three read operations: current address read, random read, and sequential read. Read operations
are initiated the same way as write operations with the exception of R/W = “1”.
Current Address Read:
The internal address counter maintains the last address accessed during the last read or write operation,
with incremented by one. Current address read accesses the address kept by the internal address counter.
After receiving a start condition and the device address word (R/W is “1”), the EEPROM outputs the 8-bit
current address data from the most significant bit following acknowledgment “0”. If the EEPROM
receives acknowledgment “1” (no acknowledgment) and a following stop condition, the EEPROM stops
the read operation and is turned to a standby state. In case the EEPROM has accessed the last address of
the last page at previous read operation, the current address will roll over and returns to zero address. In
case the EEPROM has accessed the last address of the page at previous write operation, the current address
will roll over within page addressing and returns to the first address in the same page. The current address
is valid while power is on. The current address after power on will be indefinite. The random read
operation described below is necessary to define the memory address.
Current Address Read Operation
Device
address
1010
Start
REJ03C0355-0100 Rev.1.00 Oct. 26, 2009
Page 17 of 22
Read data (n+1)
R
D7
D6
D5
D4
D3
D2
D1
D0
2k
ACK
R/W
No ACK
Stop
R1EX24002AxxS0I
Random Read:
This is a read operation with defined read address. A random read requires a dummy write to set read
address. The EEPROM receives a start condition, device address word (R/W=0) and memory address 8bit sequentially. The EEPROM outputs acknowledgment “0” after receiving memory address then enters
a current address read with receiving a start condition. The EEPROM outputs the read data of the address
which was defined in the dummy write operation. After receiving acknowledgment “1”(no
acknowledgment) and a following stop condition, the EEPROM stops the random read operation and
returns to a standby state.
Random Read Operation
Start
1010
@@@
W
ACK
R/W
Dummy write
Device
address
1010
Start
ACK
# # #
Read data (n)
R
R/W
ACK
No ACK
Stop
Current address read
Notes: 1. 2nd device address code (#) should be same as 1st (@).
REJ03C0355-0100 Rev.1.00 Oct. 26, 2009
Page 18 of 22
D7
D6
D5
D4
D3
D2
D1
D0
2k
Memory
address
a7
a6
a5
a4
a3
a2
a1
a0
Device
address
R1EX24002AxxS0I
Sequential Read:
Sequential reads are initiated by either a current address read or a random read. If the EEPROM receives
acknowledgment “0” after 8-bit read data, the read address is incremented and the next 8-bit read data are
coming out. This operation can be continued as long as the EEPROM receives acknowledgment “0”.
The address will roll over and returns address zero if it reaches the last address of the last page. The
sequential read can be continued after roll over. The sequential read is terminated if the EEPROM
receives acknowledgment “1” (no acknowledgment) and a following stop condition.
Sequential Read Operation
Start
ACK
R/W
REJ03C0355-0100 Rev.1.00 Oct. 26, 2009
Page 19 of 22
D7
D6
D5
D4
D3
D2
D1
D0
R
D7
D6
D5
D4
D3
D2
D1
D0
1010
2k
Read data (n+1) Read data (n+2)
ACK
ACK
Read data (n+m)
D5
D4
D3
D2
D1
D0
Device
address
No ACK
Stop
R1EX24002AxxS0I
Notes
Data Protection at VCC On/Off
When VCC is turned on or off, noise on the SCL and SDA inputs generated by external circuits (CPU, etc)
may act as a trigger and turn the EEPROM to unintentional program mode. To prevent this unintentional
programming, this EEPROM has a power on reset function. Be careful of the notices described below in
order for the power on reset function to operate correctly.
• SCL and SDA should be fixed to VCC or VSS during VCC on/off. Low to high or high to low transition
during VCC on/off may cause the trigger for the unintentional programming.
• VCC should be turned off after the EEPROM is placed in a standby state.
• VCC should be turned on from the ground level(VSS) in order for the EEPROM not to enter the
unintentional programming mode.
• VCC turn on rate should be longer than 2 µs/V.
Noise Suppression Time
This EEPROM have a noise suppression function at SCL and SDA inputs, that cut noise of width less than
50 ns. Be careful not to allow noise of width more than 50 ns.
REJ03C0355-0100 Rev.1.00 Oct. 26, 2009
Page 20 of 22
R1EX24002AxxS0I
Package Dimensions
R1EX24002ASAS0I (PRSP0008DF-B / Previous Code: FP-8DBV)
JEITA Package Code
P-SOP8-3.9x4.89-1.27
RENESAS Code
PRSP0008DF-B
*1
Previous Code
FP-8DBV
MASS[Typ.]
0.08g
D
8
F
NOTE)
1. DIMENSIONS"*1 (Nom)"AND"*2"
DO NOT INCLUDE MOLD FLASH.
2. DIMENSION"*3"DOES NOT
INCLUDE TRIM OFFSET.
5
*2
c
E
HE
bp
Index mark
Terminal cross section
( Ni/Pd/Au plating )
Reference Dimension in Millimeters
Symbol
4
1
Z
e
*3
bp
x
M
A
L1
A1
θ
L
y
Detail F
REJ03C0355-0100 Rev.1.00 Oct. 26, 2009
Page 21 of 22
D
E
A2
A1
A
bp
b1
c
c1
θ
HE
e
x
y
Z
L
L1
Min Nom Max
4.89 5.15
3.90
0.102 0.14 0.254
1.73
0.35 0.40 0.45
0.15 0.20 0.25
0°
8°
5.84 6.02 6.20
1.27
0.25
0.10
0.69
0.406 0.60 0.889
1.06
R1EX24002AxxS0I
R1EX24002ATAS0I (PTSP0008JC-B / Previous Code: TTP-8DAV)
JEITA Package Code
P-TSSOP8-4.4x3-0.65
RENESAS Code
PTSP0008JC-B
*1
Previous Code
TTP-8DAV
MASS[Typ.]
0.034g
D
8
F
5
NOTE)
1. DIMENSIONS"*1 (Nom)"AND"*2"
DO NOT INCLUDE MOLD FLASH.
2. DIMENSION"*3"DOES NOT
INCLUDE TRIM OFFSET.
c
*2
E
HE
bp
Terminal cross section
( Ni/Pd/Au plating )
Reference Dimension in Millimeters
Symbol
Index mark
L1
1
e
*3
bp
x
M
θ
A1
A
Z
4
L
Detail F
y
REJ03C0355-0100 Rev.1.00 Oct. 26, 2009
Page 22 of 22
D
E
A2
A1
A
bp
b1
c
c1
θ
HE
e
x
y
Z
L
L1
Min Nom Max
3.00 3.30
4.40
0.03 0.07 0.10
1.10
0.15 0.20 0.25
0.10 0.15 0.20
0°
8°
6.20 6.40 6.60
0.65
0.13
0.10
0.805
0.40 0.50 0.60
1.00
Revision History
Rev.
Date
Contents of Modification
Page
1.00
Oct.26, 2009

Description
Initial issue
R1EX24002AxxS0I Data Sheet
Sales Strategic Planning Div.
Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan
Notes:
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Colophon .7.2