AT24C64B-W1.8-11 ATMEL [ATMEL Corporation], AT24C64B-W1.8-11 Datasheet

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AT24C64B-W1.8-11

Manufacturer Part Number
AT24C64B-W1.8-11
Description
2-Wire Serial EEPROM 64K (8192 x 8)
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
Features
Description
The AT24C64B provides 65,536 bits of serial electrically erasable and programmable
read only memory (EEPROM) organized as 8192 words of 8 bits each. The device’s
cascadable feature allows up to 8 devices to share a common 2-wire bus. The device
is optimized for use in many industrial and commercial applications where low power
and low voltage operation are essential. The AT24C64B is available in space saving
8-lead JEDEC SOIC and 8-lead TSSOP packages and is accessed via a 2-wire serial
interface. In addition, the entire family is available in 2.7V (2.7 to 5.5V) and 1.8V (1.8
to 5.5V) versions.
Low-voltage and Standard-voltage Operation
Low-power Devices (I
Internally Organized 8192 x 8
2-Wire Serial Interface
Schmitt Trigger, Filtered Inputs for Noise Suppression
Bi-directional Data Transfer Protocol
400 kHz Clock Rate
Write Protect Pin for Hardware Data Protection
32-Byte Page Write Mode (Partial Page Writes Allowed)
Self-Timed Write Cycle (5 ms max)
High Reliability
Lead-free/Halogen-free Devices Available
8-lead JEDEC SOIC and 8-lead TSSOP Packages
Die Sales: Wafer Form, Waffle Pack, and Bumped Wafers
– 2.7 (V
– 1.8 (V
– Endurance: 1 Million Write Cycles
– Data Retention: 100 Years
Pin Configurations
Pin Name
A0 - A2
SDA
SCL
WP
CC
CC
= 2.7 to 5.5V)
= 1.8 to 5.5V)
Function
Address Inputs
Serial Data
Serial Clock Input
Write Protect
SB
= 6 µA at 5.5V) Available
GND
GND
A0
A1
A2
A0
A1
A2
8-lead TSSOP
8-lead SOIC
1
2
3
4
1
2
3
4
8
7
6
5
8
7
6
5
VCC
WP
SCL
SDA
VCC
WP
SCL
SDA
2-Wire
Serial EEPROM
64K (8192 x 8)
AT24C64B
2-Wire, 32K
Serial E
2
PROM
3350E–SEEPR–9/07

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AT24C64B-W1.8-11 Summary of contents

Page 1

... The device is optimized for use in many industrial and commercial applications where low power and low voltage operation are essential. The AT24C64B is available in space saving 8-lead JEDEC SOIC and 8-lead TSSOP packages and is accessed via a 2-wire serial interface ...

Page 2

... Device Addressing section). If the pins are left floating, the A2, A1 and A0 pins will be internally pulled down to GND if the capacitive cou- AT24C64B 2 *NOTICE: ...

Page 3

... If the pin is left floating, the WP pin will be internally pulled down to GND if the capacitive coupling to the circuit board V recommends connecting the pin to GND. 3. Memory Organization AT24C64B, 64K SERIAL EEPROM: The 64K is internally organized as 256 pages of 32 bytes each. Random word addressing requires a 13 bit data word address. Pin Capacitance (1) ...

Page 4

... Page Mode ) Notes: 1. This parameter is characterized and is not 100% tested (T 2. This parameter is characterized and is not 100% tested. AT24C64B 4 = -40°C to +85° Parameter (1) (2) = 25° +1.8V to +5.5V TTL Gate and CC AT24C64B 1.8V – 3.6V 5.0V Min Max Min Max 400 400 1.3 1.2 0.6 0.6 100 50 0.2 ...

Page 5

... EEPROM in 8-bit words. The EEPROM sends a zero during the ninth clock cycle to acknowl- edge that it has received each word. STANDBY MODE: The AT24C64B 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 ...

Page 6

... Write Cycle Timing SCL: Serial Clock, SDA: Serial Data I/O SCL SDA 8th BIT WORDn Note: 1. The write cycle time t is the time from a valid stop condition of a write sequence to the end of the internal clear/write cycle. WR AT24C64B 6 t HIGH LOW LOW ...

Page 7

... Data Validity SDA SCL 9. Start and Stop Definition SDA SCL 10. Output Acknowledge SCL DATA IN DATA OUT 3350E–SEEPR–9/07 DATA STABLE DATA STABLE DATA CHANGE START 1 START AT24C64B STOP 8 9 ACKNOWLEDGE 7 ...

Page 8

... A low-V prevent data corruption in a noisy environment. DATA SECURITY: The AT24C64B has a hardware data protection scheme that allows the user to write protect the upper quadrant (16K bits) of memory when the WP pin 12. Write Operations BYTE WRITE: A write operation requires two 8-bit data word addresses following the device address word and acknowledgment ...

Page 9

... The sequential read operation is terminated when the microcontroller does not respond with a zero but does generate a following stop condition (see Figure 13-1. Device Address 3350E–SEEPR–9/07 Figure 13-5 on page 12). Figure 13-6 AT24C64B Figure 13 page 12). 9 ...

Page 10

... Figure 13-2. Byte Write Figure 13-3. Page Write Note DON’T CARE bits Figure 13-4. Current Address Read AT24C64B 10 3350E–SEEPR–9/07 ...

Page 11

... Figure 13-5. Random Read Note DON’T CARE bits Figure 13-6. Sequential Read 3350E–SEEPR–9/07 AT24C64B 11 ...

Page 12

... AT24C64B-10TU-2.7 (2) AT24C64B-10TU-1.8 (3) AT24C64B-W1.8-11 Notes: 1. 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 inkless wafer form. Bumped die available upon request. Please contact Serial Marketing ...

Page 13

... Colorado Springs, CO 80906 R 3350E–SEEPR–9/ TITLE 8S1, 8-lead (0.150" Wide Body), Plastic Gull Wing Small Outline (JEDEC SOIC) AT24C64B Ø Ø END VIEW COMMON DIMENSIONS (Unit of Measure = mm) MIN NOM MAX SYMBOL A 1.35 – ...

Page 14

... 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 determined at Datum Plane H. 2325 Orchard Parkway San Jose, CA 95131 R AT24C64B TITLE 8A2, 8-lead, 4 ...

Page 15

... Revision History Doc. Rev. 3350E 3350E–SEEPR–9/07 Date Comments 9/2007 Updated to new template; implemented revision history. AT24C64B 15 ...

Page 16

Headquarters Atmel Corporation 2325 Orchard Parkway San Jose, CA 95131 USA Tel: 1(408) 441-0311 Fax: 1(408) 487-2600 Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to ...

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