ATMEL AT24C256 Two-wire serial eeprom Datasheet

Features
• Low-voltage and Standard-voltage Operation
•
•
•
•
•
•
•
•
•
•
•
•
– 2.7 (VCC = 2.7V to 5.5V)
– 1.8 (VCC = 1.8V to 3.6V)
Internally Organized 16,384 x 8 and 32,768 x 8
Two-wire Serial Interface
Schmitt Trigger, Filtered Inputs for Noise Suppression
Bidirectional Data Transfer Protocol
1 MHz (5V), 400 kHz (2.7V, 2.5V) and 100 kHz (1.8V) Compatibility
Write Protect Pin for Hardware and Software Data Protection
64-byte Page Write Mode (Partial Page Writes Allowed)
Self-timed Write Cycle (5 ms Max)
High Reliability
– Endurance: One Million Write Cycles
– Data Retention: 40 Years
Extended Temperature and Lead-free/Halogen-free
Devices Available
8-lead JEDEC PDIP, 8-lead JEDEC and EIAJ SOIC, 8-lead MAP, 8-lead TSSOP, 8-lead
SAP and 8-ball dBGA2 Packages
Die Sales: Wafer Form, Waffle Pack, and Bumped Wafers
Description
The AT24C128/256 provides 131,072/262,144 bits of serial electrically erasable and
programmable read only memory (EEPROM) organized as 16,384/32,768 words of 8
bits each. The device’s cascadable feature allows up to 4 devices to share a common
Two-wire bus. The device is optimized for use in many industrial and commercial applications where low power and low voltage operation are essential. The devices are
available in space-saving 8-lead JEDEC PDIP, 8-lead JEDEC SOIC, 8-lead EIAJ
SOIC, 8-lead MAP (24C128), 8-lead TSSOP, 8-lead SOIC Array Package and 8-ball
dBGA2 packages. In addition, the entire family is available in 2.7V (2.7V to 5.5V) and
1.8V (1.8V to 3.6V) versions.
Pin Name
Function
A0 - A1
Address Inputs
SDA
Serial Data
SCL
Serial Clock Input
WP
Write Protect
NC
No Connect
GND
Ground
8-lead TSSOP
8-lead PDIP
Table 1. Pin Configuration
A0
A1
NC
GND
8
7
6
5
1
2
3
4
VCC
WP
SCL
SDA
A0
A1
NC
GND
8-lead SOIC
A0
A1
NC
GND
1
2
3
4
8
7
6
5
1
2
3
4
8
7
6
5
Two-wire Serial
EEPROMs
128K (16,384 x 8)
256K (32,768 x 8)
AT24C128(1)
AT24C256(2)
Notes:
1. Not recommended for
new design; please
refer to AT24C128B
datasheet.
2. Not recommended for
new design; please
refer to AT24C256B
datasheet.
VCC
WP
SCL
SDA
8-lead MAP
VCC
WP
SCL
SDA
VCC
WP
SCL
SDA
8
7
6
5
1
2
3
4
A0
A1
NC
GND
Bottom View
8-ball dBGA2
VCC
WP
SCL
SDA
8
1
7
2
6
3
5
4
A0
A1
NC
GND
Bottom View
8-lead SAP
VCC
WP
SCL
SDA
8
7
6
5
1
2
3
4
A0
A1
NC
GND
Bottom View
0670T–SEEPR–3/07
1
Absolute Maximum Ratings*
Operating Temperature.................................–55° C to +125° C
Storage Temperature ....................................–65° C to +150° C
Voltage on Any Pin
with Respect to Ground .................................... –1.0V to +7.0V
Maximum Operating Voltage .......................................... 6.25V
*NOTICE:
Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and
functional operation of the device at these or any
other conditions beyond those indicated in the
operational sections of this specification is not
implied. Exposure to absolute maximum rating
conditions for extended periods may affect device
reliability.
DC Output Current........................................................ 5.0 mA
Figure 1. Block Diagram
2
AT24C128/256
0670T–SEEPR–3/07
AT24C128/256
Pin Description
SERIAL CLOCK (SCL): The SCL input is used to positive edge clock data into each
EEPROM device and negative edge clock data out of each device.
SERIAL DATA (SDA): The SDA pin is bidirectional for serial data transfer. This pin is opendrain driven and may be wire-ORed with any number of other open-drain or open collector
devices.
DEVICE/ADDRESSES (A1, A0): The A1 and A0 pins are device address inputs that are hardwired or left not connected for hardware compatibility with other AT24CXX devices. When the
pins are hardwired, as many as four 128K/256K devices may be addressed on a single bus
system (device addressing is discussed in detail under the Device Addressing section). If the
pins are left floating, the A1 and A0 pins will be internally pulled down to GND if the capacitive
coupling to the circuit board VCC plane is <3 pF. If coupling is >3 pF, Atmel recommends connecting the address pins to GND.
WRITE PROTECT (WP): The write protect input, when connected to GND, allows normal write
operations. When WP is connected high to VCC, all write operations to the memory are inhibited. If the pin is left floating, the WP pin will be internally pulled down to GND if the capacitive
coupling to the circuit board VCC plane is <3 pF. If coupling is >3 pF, Atmel recommends connecting the pin to GND.
Memory
Organization
AT24C128/256, 128K/256K SERIAL EEPROM: The 128K/256K is internally organized as
256/512 pages of 64-bytes each. Random word addressing requires a 14/15-bit data word
address.
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0670T–SEEPR–3/07
Table 2. Pin Capacitance(1)
Applicable over recommended operating range from TA = 25° C, f = 1.0 MHz, VCC = +1.8V.
Symbol
Test Condition
CI/O
CIN
Note:
Max
Units
Conditions
Input/Output Capacitance (SDA)
8
pF
VI/O = 0V
Input Capacitance (A0, A1, SCL)
6
pF
VIN = 0V
1. This parameter is characterized and is not 100% tested.
Table 3. DC Characteristics(1)
Applicable over recommended operating range from: TAI = –40° C to +85° C, V CC = +1.8V to +5.5V; TAE = – 40° C to
+125° C(2), VCC = +2.7V to +5.5V(unless otherwise noted).
Symbol
Parameter
VCC1
Supply Voltage
VCC2
Test Condition
Max
Units
1.8
3.6
V
Supply Voltage
2.5
5.5
V
VCC3
Supply Voltage
4.5
5.5
V
ICC1
Supply Current
VCC = 5.0V
READ at 400 kHz
1.0
2.0
mA
ICC2
Supply Current
VCC = 5.0V
WRITE at 400 kHz
2.0
3.0
mA
Standby Current
(1.8V option)
VCC = 1.8V
0.2
µA
ISB1
ISB2
Standby Current
(2.5V option)
ISB3
Standby Current
(5.0V option)
VCC = 4.5 - 5.5V
ILI
Input Leakage Current
VIN = VCC or VSS
ILO
Output Leakage
Current
VOUT = VCC or VSS
VIL
Input Low Level(1)
VCC = 3.6V
VCC = 2.5V
VCC = 5.5V
Min
Typ
VIN = VCC or VSS
2.0
0.5
VIN = VCC or VSS
6.0
VIN = VCC or VSS
(1)
µA
6.0
µA
0.10
3.0
µA
0.05
3.0
µA
–0.6
VCC x 0.3
V
VCC x 0.7
VCC + 0.5
V
VIH
Input High Level
VOL2
Output Low Level
VCC = 3.0V
IOL = 2.1 mA
0.4
V
VOL1
Output Low Level
VCC = 1.8V
IOL = 0.15 mA
0.2
V
Notes:
4
1. VIL min and VIH max are reference only and are not tested.
2. The AT24C128/256 bearing the process letter “B” on the package (the mark is located in the lower right corner on the topside of the package) are approved for operation in the extended temperature range.
AT24C128/256
0670T–SEEPR–3/07
AT24C128/256
Table 4. AC Characteristics – Industrial Temperatures
Applicable over recommended operating range from TAI = –40° C to +85° C, VCC = +1.8V to +5.5V, CL = 100 pF (unless otherwise noted). Test conditions are listed in Note 2.
1.8-volt
Min
2.5-volt
Symbol
Parameter
fSCL
Clock Frequency, SCL
tLOW
Clock Pulse Width Low
4.7
1.3
0.4
µs
tHIGH
Clock Pulse Width High
4.0
0.6
0.4
µs
tAA
Clock Low to Data Out Valid
0.1
tBUF
Time the bus must be free before a
new transmission can start(1)
4.7
1.3
0.5
µs
tHD.STA
Start Hold Time
4.0
0.6
0.25
µs
tSU.STA
Start Set-up Time
4.7
0.6
0.25
µs
tHD.DAT
Data In Hold Time
0
0
0
µs
tSU.DAT
Data In Set-up Time
200
100
100
ns
Inputs Rise Time
tR
(1)
tF
Inputs Fall Time
tSU.STO
Stop Set-up Time
4.7
tDH
Data Out Hold Time
100
Write Cycle Time
Endurance(1)
25°C, Page Mode
Notes:
Min
100
(1)
tWR
Max
5.0-volt
Max
Min
400
4.5
0.05
0.9
0.05
Max
Units
1000
kHz
0.55
µs
1.0
0.3
0.3
µs
300
300
100
ns
0.6
0.25
50
20 or 5
(3)
µs
50
(3)
10 or 5
100k or 1,000,000(4)
ns
10 or 5
(3)
ms
Write
Cycles
1. This parameter is characterized and is not 100% tested.
2. AC measurement conditions:
RL (connects to VCC): 1.3 kΩ (2.5V, 5V), 10 kΩ (1.8V)
Input pulse voltages: 0.3 VCC to 0.7 VCC
Input rise and fall times: ≤50 ns
Input and output timing reference voltages: 0.5 VCC
3. The Write Cycle Time of 5 ms only applies to the AT24C128/256 devices bearing the process letter “B” on the package (the
mark is located in the lower right corner on the top side of the package).
4. The AT24C128/256 bearing the process letter “B” in the package (the mark is located in the lower right corner on the top
side of the package), guarantees 1 million write cycle endurance (1.8 – 3.6V).
5
0670T–SEEPR–3/07
Table 5. AC Characteristics(5) – Extended Temperatures
Applicable over recommended operating range from TAE = –40° C to +125° C, VCC = +2.7V to +5.5V, CL = 100 pF (unless
otherwise noted). Test conditions are listed in Note 2.
2.7-volt
Min
5.0-volt
Symbol
Parameter
fSCL
Clock Frequency, SCL
tLOW
Clock Pulse Width Low
1.3
0.4
µs
tHIGH
Clock Pulse Width High
0.6
0.4
µs
tAA
Clock Low to Data Out Valid
0.05
tBUF
Time the bus must be free before a new
transmission can start(1)
1.3
0.5
µs
tHD.STA
Start Hold Time
0.6
0.25
µs
tSU.STA
Start Set-up Time
0.6
0.25
µs
tHD.DAT
Data In Hold Time
0
0
µs
tSU.DAT
Data In Set-up Time
100
100
ns
Inputs Rise Time
(1)
tF
Inputs Fall Time
tSU.STO
Stop Set-up Time
0.6
tDH
Data Out Hold Time
50
tWR
Write Cycle Time
Endurance(1)
25°C, Page Mode
Notes:
6
Min
400
(1)
tR
Max
0.9
0.05
Max
Units
1000
kHz
0.55
µs
0.3
0.3
µs
300
100
ns
0.25
µs
50
10 or 5
(3)
100k or 1,000,000(4)
ns
(3)
10 or 5
ms
Write
Cycles
1. This parameter is characterized and is not 100% tested.
2. AC measurement conditions:
RL (connects to VCC): 1.3 kΩ (2.5V, 5V), 10 kΩ (1.8V)
Input pulse voltages: 0.3 VCC to 0.7 VCC
Input rise and fall times: ≤50 ns
Input and output timing reference voltages: 0.5 VCC
3. The Write Cycle Time of 5 ms only applies to the AT24C128/256 devices bearing the process letter “B” on the package (the
mark is located in the lower right corner on the top side of the package).
4. The AT24C128/256 bearing the process letter “B” in the package (the mark is located in the lower right corner on the top
side of the package), guarantees 1 million write cycle endurance (1.8 – 3.6V).
5. The AT24C128/256 bearing the process letter “B” on the package (the mark is located in the lower right corner on the topside of the package) are approved for operation in the extended temperature range.
AT24C128/256
0670T–SEEPR–3/07
AT24C128/256
Device
Operation
CLOCK and DATA TRANSITIONS: The SDA pin is normally pulled high with an external
device. Data on the SDA pin may change only during SCL low time periods (see Figure 4 on
page 9). Data changes during SCL high periods will indicate a start or stop condition as
defined below.
START CONDITION: A high-to-low transition of SDA with SCL high is a start condition which
must precede any other command (see Figure 5 on page 9).
STOP CONDITION: A low-to-high transition of SDA with SCL high is a stop condition. After a
read sequence, the stop command will place the EEPROM in a standby power mode (see Figure 5 on page 9).
ACKNOWLEDGE: All addresses and data words are serially transmitted to and from the
EEPROM in 8-bit words. The EEPROM sends a zero during the ninth clock cycle to acknowledge that it has received each word.
STANDBY MODE: The AT24C128/256 features a low power standby mode which is enabled:
a) upon power-up and b) after the receipt of the STOP bit and the completion of any internal
operations.
MEMORY RESET: After an interruption in protocol, power loss or system reset, any two-wire
part can be reset by following these steps: (a) Clock up to 9 cycles, (b) look for SDA high in
each cycle while SCL is high and then (c) create a start condition as SDA is high.
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0670T–SEEPR–3/07
Figure 2. Bus Timing (SCL: Serial Clock, SDA: Serial Data I/O®)
Figure 3. Write Cycle Timing (SCL: Serial Clock, SDA: Serial Data I/O)
SCL
SDA
8th BIT
ACK
WORDn
twr
STOP
CONDITION
Note:
8
(1)
START
CONDITION
1. The write cycle time tWR is the time from a valid stop condition of a write sequence to the end of the internal clear/write cycle.
AT24C128/256
0670T–SEEPR–3/07
AT24C128/256
Figure 4. Data Validity
Figure 5. Start and Stop Definition
Figure 6. Output Acknowledge
9
0670T–SEEPR–3/07
Device
Addressing
The 128K/256K EEPROM requires an 8-bit device address word following a start condition to
enable the chip for a read or write operation (see Figure 7 on page 11). The device address
word consists of a mandatory one, zero sequence for the first five most significant bits as
shown. This is common to all two-wire EEPROM devices.
The 128K/256K uses the two device address bits A1, A0 to allow as many as four devices on
the same bus. These bits must compare to their corresponding hardwired input pins. The A1
and A0 pins use an internal proprietary circuit that biases them to a logic low condition if the
pins are allowed to float.
The eighth bit of the device address is the read/write operation select bit. A read operation is
initiated if this bit is high and a write operation is initiated if this bit is low.
Upon a compare of the device address, the EEPROM will output a zero. If a compare is not
made, the device will return to a standby state.
DATA SECURITY: The AT24C128/256 has a hardware data protection scheme that allows the
user to write protect the whole memory when the WP pin is at VCC.
Write
Operations
BYTE WRITE: A write operation requires two 8-bit data word addresses following the device
address word and acknowledgment. Upon receipt of this address, the EEPROM will again
respond with a zero and then clock in the first 8-bit data word. Following receipt of the 8-bit
data word, the EEPROM will output a zero. The addressing device, such as a microcontroller,
then must terminate the write sequence with a stop condition. At this time the EEPROM enters
an internally-timed write cycle, tWR, to the nonvolatile memory. All inputs are disabled during
this write cycle and the EEPROM will not respond until the write is complete (see Figure 8 on
page 11).
PAGE WRITE: The 128K/256K EEPROM is capable of 64-byte page writes.
A page write is initiated the same way as a byte write, but the microcontroller does not send a
stop condition after the first data word is clocked in. Instead, after the EEPROM acknowledges
receipt of the first data word, the microcontroller can transmit up to 63 more data words. The
EEPROM will respond with a zero after each data word received. The microcontroller must terminate the page write sequence with a stop condition (see Figure 9 on page 12).
The data word address lower 6 bits are internally incremented following the receipt of each
data word. The higher data word address bits are not incremented, retaining the memory page
row location. When the word address, internally generated, reaches the page boundary, the
following byte is placed at the beginning of the same page. If more than 64 data words are
transmitted to the EEPROM, the data word address will “roll over” and previous data will be
overwritten. The address “roll over” during write is from the last byte of the current page to the
first byte of the same page.
ACKNOWLEDGE POLLING: Once the internally-timed write cycle has started and the
EEPROM inputs are disabled, acknowledge polling can be initiated. This involves sending a
start condition followed by the device address word. The read/write bit is representative of the
operation desired. Only if the internal write cycle has completed will the EEPROM respond
with a zero, allowing the read or write sequence to continue.
10
AT24C128/256
0670T–SEEPR–3/07
AT24C128/256
Read
Operations
Read operations are initiated the same way as write operations with the exception that the
read/write select bit in the device address word is set to one. There are three read operations:
current address read, random address read and sequential read.
CURRENT ADDRESS READ: The internal data word address counter maintains the last
address accessed during the last read or write operation, incremented by one. This address
stays valid between operations as long as the chip power is maintained. The address “roll
over” during read is from the last byte of the last memory page, to the first byte of the first
page.
Once the device address with the read/write select bit set to one is clocked in and acknowledged by the EEPROM, the current address data word is serially clocked out. The
microcontroller does not respond with an input zero but does generate a following stop condition (see Figure 10 on page 12).
RANDOM READ: A random read requires a “dummy” byte write sequence to load in the data
word address. Once the device address word and data word address are clocked in and
acknowledged by the EEPROM, the microcontroller must generate another start condition.
The microcontroller now initiates a current address read by sending a device address with the
read/write select bit high. The EEPROM acknowledges the device address and serially clocks
out the data word. The microcontroller does not respond with a zero but does generate a following stop condition (see Figure 11 on page 12).
SEQUENTIAL READ: Sequential reads are initiated by either a current address read or a random address read. After the microcontroller receives a data word, it responds with an
acknowledge. As long as the EEPROM receives an acknowledge, it will continue to increment
the data word address and serially clock out sequential data words. When the memory
address limit is reached, the data word address will “roll over” and the sequential read will continue. The sequential read operation is terminated when the microcontroller does not respond
with a zero but does generate a following stop condition (see Figure 12 on page 12).
Figure 7. Device Address
Figure 8. Byte Write
11
0670T–SEEPR–3/07
Figure 9. Page Write
Notes:
(* = DON’T CARE bit)
(† = DON’T CARE bit for the 128K)
Figure 10. Current Address Read
Figure 11. Random Read
Notes:
(* = DON’T CARE bit)
(† = DON’T CARE bit for the 128K)
Figure 12. Sequential Read
12
AT24C128/256
0670T–SEEPR–3/07
AT24C128/256
AT24C128 Ordering Information(1)
Ordering Code
AT24C128-10PU-2.7(2)
AT24C128-10PU-1.8(2)
AT24C128N-10SU-2.7(2)
AT24C128N-10SU-1.8(2)
AT24C128W-10SU-2.7(2)
AT24C128W-10SU-1.8(2)
AT24C128-10TU-2.7(2)
AT24C128-10TU-1.8(2)
AT24C128U2-10UU-1.8(2)
AT24C128Y1-10YU-1.8(2)
AT24C128Y4-10YU-1.8(2)
AT24C128-W1.8-11(3)
Notes:
Package
Operation Range
8P3
8P3
8S1
8S1
8S2
8S2
8A2
8A2
8U2-1
8Y1
8Y4
Lead-free/Halogen-free/
Industrial Temperature
(–40° C to 85° C)
Die Sale
Industrial Temperature
(–40° C to 85° C)
1. This device is not recommended for new design. Please refer to AT24C128B datasheet. For 2.7V devices used in the 4.5V to
5.5V range, please refer to performance values in the AC and DC characteristics tables.
2. “U” designates Green package + RoHS compliant.
3. Available in waffle pack and wafer form; order as SL788 for wafer form. Bumped die available upon request. Please contact
Serial EEPROM Marketing.
Package Type
8P3
8-lead, 0.300" Wide, Plastic Dual Inline Package (PDIP)
8S1
8-lead, 0.150" Wide, Plastic Gull Wing Small Outline Package (JEDEC SOIC)
8S2
8-lead, 0.200" Wide, Plastic Gull Wing Small Outline Package (EIAJ SOIC)
8U2-1
8-ball, die Ball Grid Array Package (dBGA2)
8Y1
8-lead, 4.90 mm x 3.00 mm Body, Dual Footprint, Non-leaded, Miniature Array Package (MAP)
8Y4
8-lead, 6.00 mm x 4.90 mm Body, Dual Footprint, Non-leaded, Small Array Package (SAP)
8A2
8-lead, 4.4 mm Body, Plastic Thin Shrink Small Outline Package (TSSOP)
Options
–2.7
Low-voltage (2.7V to 5.5V)
–1.8
Low-voltage (1.8V to 3.6V)
13
0670T–SEEPR–3/07
AT24C256 Ordering Information(1)
Ordering Code
AT24C256-10PU-2.7(2)
AT24C256-10PU-1.8(2)
AT24C256N-10SU-2.7(2)
AT24C256N-10SU-1.8(2)
AT24C256W-10SU-2.7(2)
AT24C256W-10SU-1.8(2)
AT24C256-10TU-2.7(2)
AT24C256-10TU-1.8(2)
AT24C256U2-10UU-1.8(2)
AT24C256Y1-10YU-1.8(2)
AT24C256Y4-10YU-1.8(2)
AT24C256-W1.8-11(3)
Notes:
Package
Operation Range
8P3
8P3
8S1
8S1
8S2
8S2
8A2
8A2
8U2-1
8Y1
8Y4
Lead-free/Halogen-free/
Industrial Temperature
(–40° C to 85° C)
Die Sale
Industrial Temperature
(–40° C to 85° C)
1. This device is not recommended for new design. Please refer to AT24C256B datasheet. For 2.7V devices used in the 4.5V to
5.5V range, please refer to performance values in the AC and DC characteristics tables.
2. “U” designates Green Package + RoHS compliant.
3. Available in waffle pack and wafer form; order as SL788 for wafer form. Bumped die available upon request. Please contact
Serial EEPROM Marketing.
Package Type
8P3
8-lead, 0.300" Wide, Plastic Dual Inline Package (PDIP)
8S1
8-lead, 0.150" Wide, Plastic Gull Wing Small Outline Package (JEDEC SOIC)
8S2
8-lead, 0.200" Wide, Plastic Gull Wing Small Outline Package (EIAJ SOIC)
8U2-1
8-ball, die Ball Grid Array Package (dBGA2)
8Y1
8-lead, 4.90 mm x 3.00 mm Body, Dual Footprint, Non-leaded, Miniature Array Package (MAP)
8Y4
8-lead, 6.00 mm x 4.90 mm Body, Dual Footprint, Non-leaded, Small Array Package (SAP)
8A2
8-lead, 4.4 mm Body, Plastic Thin Shrink Small Outline Package (TSSOP)
Options
–2.7
Low-voltage (2.7V to 5.5V)
–1.8
Low-voltage (1.8V to 3.6V)
14
AT24C128/256
0670T–SEEPR–3/07
AT24C128/256
Packaging Information
8P3 – PDIP
E
1
E1
N
Top View
c
eA
End View
COMMON DIMENSIONS
(Unit of Measure = inches)
D
e
D1
A2 A
SYMBOL
MIN
NOM
A
b2
b3
b
4 PLCS
Side View
L
0.210
NOTE
2
A2
0.115
0.130
0.195
b
0.014
0.018
0.022
5
b2
0.045
0.060
0.070
6
6
b3
0.030
0.039
0.045
c
0.008
0.010
0.014
D
0.355
0.365
0.400
D1
0.005
E
0.300
E1
0.240
e
3
3
0.310
0.325
4
0.250
0.280
3
0.100 BSC
eA
L
Notes:
MAX
0.300 BSC
0.115
0.130
4
0.150
2
1. This drawing is for general information only; refer to JEDEC Drawing MS-001, Variation BA for additional information.
2. Dimensions A and L are measured with the package seated in JEDEC seating plane Gauge GS-3.
3. D, D1 and E1 dimensions do not include mold Flash or protrusions. Mold Flash or protrusions shall not exceed 0.010 inch.
4. E and eA measured with the leads constrained to be perpendicular to datum.
5. Pointed or rounded lead tips are preferred to ease insertion.
6. b2 and b3 maximum dimensions do not include Dambar protrusions. Dambar protrusions shall not exceed 0.010 (0.25 mm).
01/09/02
R
2325 Orchard Parkway
San Jose, CA 95131
TITLE
8P3, 8-lead, 0.300" Wide Body, Plastic Dual
In-line Package (PDIP)
DRAWING NO.
REV.
8P3
B
15
0670T–SEEPR–3/07
8S1 – JEDEC SOIC
C
1
E
E1
L
N
∅
Top View
End View
e
B
COMMON DIMENSIONS
(Unit of Measure = mm)
A
SYMBOL
A1
D
Side View
MIN
NOM
MAX
A
1.35
–
1.75
A1
0.10
–
0.25
b
0.31
–
0.51
C
0.17
–
0.25
D
4.80
–
5.00
E1
3.81
–
3.99
E
5.79
–
6.20
e
NOTE
1.27 BSC
L
0.40
–
1.27
∅
0˚
–
8˚
Note: These drawings are for general information only. Refer to JEDEC Drawing MS-012, Variation AA for proper dimensions, tolerances, datums, etc.
10/7/03
R
16
1150 E. Cheyenne Mtn. Blvd.
Colorado Springs, CO 80906
TITLE
8S1, 8-lead (0.150" Wide Body), Plastic Gull Wing
Small Outline (JEDEC SOIC)
DRAWING NO.
8S1
REV.
B
AT24C128/256
0670T–SEEPR–3/07
AT24C128/256
8S2 – EIAJ SOIC
C
1
E
E1
L
N
Top View
∅
End View
e
b
COMMON DIMENSIONS
(Unit of Measure = mm)
A
SYMBOL
A1
D
Side View
NOM
MAX
NOTE
A
1.70
2.16
A1
0.05
0.25
b
0.35
0.48
5
C
0.15
0.35
5
D
5.13
5.35
E1
5.18
5.40
E
7.70
8.26
L
0.51
0.85
∅
0˚
8˚
e
Notes: 1.
2.
3.
4.
5.
MIN
1.27 BSC
2, 3
4
This drawing is for general information only; refer to EIAJ Drawing EDR-7320 for additional information.
Mismatch of the upper and lower dies and resin burrs are not included.
It is recommended that upper and lower cavities be equal. If they are different, the larger dimension shall be regarded.
Determines the true geometric position.
Values b and C apply to pb/Sn solder plated terminal. The standard thickness of the solder layer shall be 0.010 +0.010/−0.005 mm.
10/7/03
R
2325 Orchard Parkway
San Jose, CA 95131
TITLE
8S2, 8-lead, 0.209" Body, Plastic Small
Outline Package (EIAJ)
DRAWING NO.
8S2
REV.
C
17
0670T–SEEPR–3/07
8U2-1 – dBGA2
D
A1 BALL PAD CORNER
1.
b
E
A1
A2
Top View
A
A1 BALL PAD CORNER
2
Side View
1
A
B
e
C
D
(e1)
d
(d1)
Bottom View
8 Solder Balls
1. This drawing is for general information only.
2. Dimension ‘b’ is measured at the maximum solder ball diameter.
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL
MIN
NOM
MAX
A
0.81
0.91
1.00
A1
0.15
0.20
0.25
A2
0.40
0.45
0.50
b
0.25
0.30
0.35
D
2.35 BSC
E
3.73 BSC
e
0.75 BSC
e1
0.74 REF
d
0.75 BSC
d1
0.80 REF
NOTE
2
6/24/03
R
18
1150 E. Cheyenne Mtn. Blvd.
Colorado Springs, CO 80906
TITLE
8U2-1, 8-ball, 2.35 x 3.73 mm Body, 0.75 mm pitch,
Small Die Ball Grid Array Package (dBGA2)
DRAWING NO.
PO8U2-1
REV.
A
AT24C128/256
0670T–SEEPR–3/07
AT24C128/256
8Y1 – MAP
PIN 1 INDEX AREA
A
1
3
2
4
PIN 1 INDEX AREA
E1
D1
D
L
8
Bottom View
COMMON DIMENSIONS
(Unit of Measure = mm)
A
MIN
NOM
MAX
A
–
–
0.90
A1
0.00
–
0.05
D
4.70
4.90
5.10
E
2.80
3.00
3.20
D1
0.85
1.00
1.15
E1
0.85
1.00
1.15
b
0.25
0.30
0.35
SYMBOL
Side View
5
e
End View
Top View
6
b
A1
E
7
e
L
NOTE
0.65 TYP
0.50
0.60
0.70
2/28/03
R
2325 Orchard Parkway
San Jose, CA 95131
TITLE
8Y1, 8-lead (4.90 x 3.00 mm Body) MSOP Array Package
(MAP) Y1
DRAWING NO.
REV.
8Y1
C
19
0670T–SEEPR–3/07
AT24C128/256
8Y4 – SAP
PIN 1 INDEX AREA
A
D1
PIN 1 ID
D
E1
L
A1
E
e
b
e1
A
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL
MIN
NOM
MAX
A
–
–
0.90
A1
0.00
–
0.05
D
5.80
6.00
6.20
E
4.70
4.90
5.10
D1
2.85
3.00
3.15
E1
2.85
3.00
3.15
b
0.35
0.40
0.45
e
1.27 TYP
e1
3.81 REF
L
0.50
0.60
NOTE
0.70
5/24/04
R
1150 E. Cheyenne Mtn. Blvd.
Colorado Springs, CO 80906
TITLE
8Y4, 8-lead (6.00 x 4.90 mm Body) SOIC Array Package
(SAP) Y4
DRAWING NO.
REV.
8Y4
A
20
0670T–SEEPR–3/07
AT24C128/256
8A2 – TSSOP
3
2 1
Pin 1 indicator
this corner
E1
E
L1
N
L
Top View
End View
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL
A
b
D
MIN
2.90
E
e
D
A2
NOTE
3.00
3.10
2, 5
3, 5
E1
4.30
4.40
4.50
A
–
–
1.20
A2
0.80
1.00
1.05
b
0.19
–
0.30
L
4
0.65 BSC
0.45
L1
Notes:
MAX
6.40 BSC
e
Side View
NOM
0.60
0.75
1.00 REF
1. This drawing is for general information only. Refer to JEDEC Drawing MO-153, Variation AA, for proper dimensions, tolerances,
datums, etc.
2. Dimension D does not include mold Flash, protrusions or gate burrs. Mold Flash, protrusions and gate burrs shall not exceed
0.15 mm (0.006 in) per side.
3. Dimension E1 does not include inter-lead Flash or protrusions. Inter-lead Flash and protrusions shall not exceed 0.25 mm
(0.010 in) per side.
4. Dimension b does not include Dambar protrusion. Allowable Dambar protrusion shall be 0.08 mm total in excess of the
b dimension at maximum material condition. Dambar cannot be located on the lower radius of the foot. Minimum space between
protrusion and adjacent lead is 0.07 mm.
5. Dimension D and E1 to be determined at Datum Plane H.
5/30/02
R
2325 Orchard Parkway
San Jose, CA 95131
TITLE
8A2, 8-lead, 4.4 mm Body, Plastic
Thin Shrink Small Outline Package (TSSOP)
DRAWING NO.
8A2
REV.
B
21
0670T–SEEPR–3/07
Revision History
22
Doc. Rev.
Date
Comments
0670T
3/2007
Added note ‘Not recommended for new design’ to AT24C128
0670S
5/2006
Implemented Revision History page; Added Note 1 “Not
recommended for new design; please refer to AT24C256B
datasheet” to AT24C256 part on Pages 1 and 14
AT24C128/256
0670T–SEEPR–3/07
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0670T–SEEPR–3/07