AT28HC64BF-12PU Atmel, AT28HC64BF-12PU Datasheet

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AT28HC64BF-12PU

Manufacturer Part Number
AT28HC64BF-12PU
Description
IC EEPROM 64KBIT 120NS 28DIP
Manufacturer
Atmel
Datasheets

Specifications of AT28HC64BF-12PU

Format - Memory
EEPROMs - Parallel
Memory Type
EEPROM
Memory Size
64K (8K x 8)
Speed
120ns
Interface
Parallel
Voltage - Supply
4.5 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Package / Case
28-DIP (0.600", 15.24mm)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
1. Description
The AT28HC64B is a high-performance electrically-erasable and programmable read-
only memory (EEPROM). Its 64K of memory is organized as 8,192 words by 8 bits.
Manufactured with Atmel’s advanced nonvolatile CMOS technology, the device offers
access times to 55 ns with power dissipation of just 220 mW. When the device is
deselected, the CMOS standby current is less than 100 µA.
The AT28HC64B is accessed like a Static RAM for the read or write cycle without the
need for external components. The device contains a 64-byte page register to allow
writing of up to 64 bytes simultaneously. During a write cycle, the addresses and 1 to
64 bytes of data are internally latched, freeing the address and data bus for other
operations. Following the initiation of a write cycle, the device will automatically write
the latched data using an internal control timer. The end of a write cycle can be
detected by DATA polling of I/O7. Once the end of a write cycle has been detected, a
new access for a read or write can begin.
Atmel’s AT28HC64B has additional features to ensure high quality and manufactura-
bility. The device utilizes internal error correction for extended endurance and
improved data retention characteristics. An optional software data protection mecha-
nism is available to guard against inadvertent writes. The device also includes an
extra 64 bytes of EEPROM for device identification or tracking.
Fast Read Access Time – 70 ns
Automatic Page Write Operation
Fast Write Cycle Times
Low Power Dissipation
Hardware and Software Data Protection
DATA Polling and Toggle Bit for End of Write Detection
High Reliability CMOS Technology
Single 5 V ±10% Supply
CMOS and TTL Compatible Inputs and Outputs
JEDEC Approved Byte-wide Pinout
Industrial Temperature Ranges
Green (Pb/Halide-free) Packaging Option Only
– Internal Address and Data Latches for 64 Bytes
– Page Write Cycle Time: 10 ms Maximum (Standard)
– 1 to 64-byte Page Write Operation
– 40 mA Active Current
– 100 µA CMOS Standby Current
– Endurance: 100,000 Cycles
– Data Retention: 10 Years
2 ms Maximum (Option – Ref. AT28HC64BF Datasheet)
64K (8K x 8)
High-speed
Parallel
EEPROM with
Page Write and
Software Data
Protection
AT28HC64B
0274L–PEEPR–2/3/09

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AT28HC64BF-12PU Summary of contents

Page 1

... Automatic Page Write Operation – Internal Address and Data Latches for 64 Bytes • Fast Write Cycle Times – Page Write Cycle Time Maximum (Standard Maximum (Option – Ref. AT28HC64BF Datasheet) – 64-byte Page Write Operation • Low Power Dissipation – Active Current – ...

Page 2

Pin Configurations Pin Name Function A0 - A12 Addresses CE Chip Enable OE Output Enable WE Write Enable I/O0 - I/O7 Data Inputs/Outputs NC No Connect DC Don’t Connect 2.1 28-lead SOIC Top View A12 2 ...

Page 3

... Read The AT28HC64B is accessed like a Static RAM. When CE and OE are low and WE is high, the data stored at the memory location determined by the address pins is asserted on the out- puts. The outputs are put in the high-impedance state when either high. This dual line control gives designers flexibility in preventing bus contention in their systems. ...

Page 4

... A software-controlled data protection feature has been implemented on the AT28HC64B. When enabled, the software data protection (SDP), will prevent inadvertent writes. The SDP feature may be enabled or disabled by the user; the AT28HC64B is shipped from Atmel with SDP disabled. SDP is enabled by the user issuing a series of three write commands in which three specific bytes of data are written to three specific addresses (refer to the “ ...

Page 5

DC and AC Operating Range Operating Temperature (Case) V Power Supply CC 6. Operating Modes Mode Read (2) Write Standby/Write Inhibit Write Inhibit Write Inhibit Output Disable Chip Erase Notes can be VIL or VIH. 2. See ...

Page 6

AC Read Characteristics Symbol Parameter t Address to Output Delay ACC ( Output Delay CE ( Output Delay OE (3)( Output Float DF t Output Hold OH 10. AC Read ...

Page 7

Input Test Waveforms and Measurement Level 12. Output Test Load 13. Pin Capacitance ( MHz 25°C Symbol Typ OUT Note: 1. This parameter is characterized and is not 100% ...

Page 8

AC Write Characteristics Symbol Parameter Address, OE Setup Time AS OES t Address Hold Time AH t Chip Select Setup Time CS t Chip Select Hold Time CH t Write Pulse Width (WE or CE) WP ...

Page 9

... Page Mode Characteristics Symbol Parameter t Write Cycle Time WC t Write Cycle Time (Use AT28HC64BF Address Setup Time AS t Address Hold Time AH t Data Setup Time DS t Data Hold Time DH t Write Pulse Width WP t Byte Load Cycle Time BLC t Write Pulse Width High WPH 17 ...

Page 10

Software Data Protection Enable (1) Algorithm LOAD DATA AA TO ADDRESS 1555 LOAD DATA 55 TO ADDRESS 0AAA LOAD DATA A0 TO ADDRESS 1555 WRITES ENABLED LOAD DATA XX TO (4) ANY ADDRESS LOAD LAST BYTE TO LAST ADDRESS ...

Page 11

Data Polling Characteristics Symbol Parameter t Data Hold Time Hold Time OEH ( Output Delay OE t Write Recovery Time WR Note: 1. These parameters are characterized and not 100% tested. 23. Data ...

Page 12

Normalized I Graphs CC AT28HC64B 12 0274L–PEEPR–2/3/09 ...

Page 13

... Plastic J-leaded Chip Carrier (PLCC) 28S 28-lead, 0.300" Wide, Plastic Gull Wing Small Outline (SOIC) 28T 28-lead, Plastic Thin Small Outline Package (TSOP) 27.2 Die Products Contact Atmel Sales for die sales options. 0274L–PEEPR–2/3/09 Ordering Code Package AT28HC64B-70TU 28T AT28HC64B-70JU ...

Page 14

Packaging Information 28.1 32J – PLCC 1.14(0.045) X 45˚ 0.51(0.020)MAX 45˚ MAX (3X) Notes: 1. This package conforms to JEDEC reference MS-016, Variation AE. 2. Dimensions D1 and E1 do not include mold protrusion. Allowable protrusion is ...

Page 15

SOIC Dimensions in Millimeters and (Inches). Controlling dimension: Millimeters. 2325 Orchard Parkway San Jose, CA 95131 R 0274L–PEEPR–2/3/09 0.51(0.020) 0.33(0.013) 7.60(0.2992) 7.40(0.2914) PIN 1 1.27(0.50) BSC TOP VIEW 18.10(0.7125) 17.70(0.6969) 0.30(0.0118) 0.10(0.0040) 0º ~ 8º 1.27(0.050) 0.40(0.016) ...

Page 16

TSOP Pin 1 Identifier Area e E Notes: 1. This package conforms to JEDEC reference MO-183. 2. Dimensions D1 and E do not include mold protrusion. Allowable protrusion 0.15 mm per side and on ...

Page 17

... Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN ATMEL’S TERMS AND CONDI- TIONS OF SALE LOCATED ON ATMEL’S WEB SITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTORY WARRANTY RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT ...

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