AT28C64B-25TI Atmel, AT28C64B-25TI Datasheet

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AT28C64B-25TI

Manufacturer Part Number
AT28C64B-25TI
Description
Manufacturer
Atmel
Datasheet

Specifications of AT28C64B-25TI

Density
64Kb
Interface Type
Parallel
Organization
8Kx8
Access Time (max)
250ns
Write Protection
Yes
Data Retention
10Year
Operating Supply Voltage (typ)
5V
Package Type
TSOP-I
Operating Temp Range
-40C to 85C
Supply Current
40mA
Operating Supply Voltage (min)
4.5V
Operating Supply Voltage (max)
5.5V
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
28
Lead Free Status / Rohs Status
Not Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AT28C64B-25TI
Manufacturer:
ATMEL
Quantity:
200
Features
Description
The AT28C64B 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 150 ns with power dissipation of just 220 mW. When the device is
deselected, the CMOS standby current is less than 100 µA.
Pin Configurations
Note:
Pin Name
A0 - A12
CE
OE
WE
I/O0 - I/O7
NC
DC
Fast Read Access Time – 150 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 5V ± 10% Supply
CMOS and TTL Compatible Inputs and Outputs
JEDEC Approved Byte-wide Pinout
Commercial and Industrial Temperature Ranges
– Internal Address and Data Latches for 64 Bytes
– Page Write Cycle Time: 10 ms Maximum
– 1 to 64-byte Page Write Operation
– 40 mA Active Current
– 100 µA CMOS Standby Current
– Endurance: 100,000 Cycles
– Data Retention: 10 Years
I/O0
NC
A6
A5
A4
A3
A2
A1
A0
PLCC package pins 1 and 17 are
DON’T CONNECT.
5
6
7
8
9
10
11
12
13
Top View
PLCC
Function
Addresses
Chip Enable
Output Enable
Write Enable
Data Inputs/Outputs
No Connect
Don’t Connect
29
28
27
26
25
24
23
22
21
A8
A9
A11
NC
OE
A10
CE
I/O7
I/O6
VCC
A11
A12
WE
OE
NC
NC
A9
A8
A7
A6
A5
A4
A3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
GND
I/O0
I/O1
I/O2
A12
NC
A7
A6
A5
A4
A3
A2
A1
A0
Top View
TSOP
PDIP, SOIC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Top View
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VCC
WE
NC
A8
A9
A11
OE
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
(continued)
28
27
26
25
24
23
22
21
20
19
18
17
16
15
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
GND
I/O2
I/O1
I/O0
A0
A1
A2
64K (8K x 8)
Parallel
EEPROM with
Page Write and
Software Data
Protection
AT28C64B
Rev. 0270H–12/99
1

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AT28C64B-25TI Summary of contents

Page 1

... Commercial and Industrial Temperature Ranges Description The AT28C64B 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 150 ns with power dissipation of just 220 mW. When the device is deselected, the CMOS standby current is less than 100 µ ...

Page 2

... The AT28C64B 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 bytes simultaneously. During a write cycle, the addresses and bytes of data are internally latched, freeing the address and data bus for other operations. Fol- lowing the initiation of a write cycle, the device will automat- ically write the latched data using an internal control timer ...

Page 3

... AT28C64B. When enabled, the software data protection (SDP), will prevent inadvertent writes. The SDP feature may be enabled or disabled by the user; the AT28C64B is shipped from Atmel with SDP disabled. SDP is enabled by the user issuing a series of three write ...

Page 4

... ( ( Condition I 0. Com., Ind 2. MHz OUT -400 µA OH AT28C64B-25 0°C - 70°C -40°C - 85°C 5V ± 10 OUT High High Z V High Z IL Min Max Units 10 µA 10 µA 100 µ 0.8 V 2.0 V 0.40 V 2.4 V ...

Page 5

... Min Max 150 150 after the address transition without impact on t ACC after the falling edge of CE without impact pF). L Output Test Load Max 6 12 AT28C64B AT28C64B-20 AT28C64B-25 Min Max Min Max 200 250 200 250 100 ACC after an address change CE ...

Page 6

... 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 ( Data Setup Time Data, OE Hold Time DH OEH AC Write Waveforms WE Controlled CE Controlled AT28C64B 6 Min Max Units 100 ...

Page 7

... Page Mode Write Waveforms Notes through A12 must specify the same page address during each high to low transition of WE (or CE must be high only when WE and CE are both low. Chip Erase Waveforms µsec (min msec (min 12.0 ± 0. (1)(2) AT28C64B Min Max Units ...

Page 8

... Software Protected Write Cycle Waveforms Notes through A12 must specify the same page address during each high to low transition of WE (or CE) after the software code has been entered must be high only when WE and CE are both low. AT28C64B 8 Software Data Protection Disable Algorithm (2) (1)(2) (1) ...

Page 9

... See “AC Read Characteristics”. (1)(2)(3) Toggle Bit Waveforms Notes: 1. Toggling either both OE and CE will operate toggle bit. 2. Beginning and ending state of I/O6 will vary. 3. Any address location may be used but the address should not vary. (1) (1) AT28C64B Min Typ Max Min Typ Max 10 10 ...

Page 10

... AT28C64B 10 ...

Page 11

... AT28C64B-20SC AT28C64B-20TC AT28C64B-20JI AT28C64B-20PI AT28C64B-20SI AT28C64B-20TI AT28C64B-25JC AT28C64B-25PC AT28C64B-25SC AT28C64B-25TC AT28C64B-25JI AT28C64B-25PI AT28C64B-25SI AT28C64B-25TI Package and Temperature Combinations JC, JI, PC, PI, SC, SI, TC, TI JC, JI, PC, PI, SC, SI, TC, TI JC, JI, PC, PI, SC, SI, TC Package Type AT28C64B Package Operation Range 32J Commercial 28P6 (0°C to 70°C) ...

Page 12

... Wide, Plastic Gull Wing Small Outline (SOIC) Dimensions in Inches and (Millimeters) AT28C64B 12 28P6, 28-lead, 0.600" Wide, Plastic Dual Inline Package (PDIP) Dimensions in Inches and (Millimeters) JEDEC STANDARD MS-011 AB .025(.635) X 30˚ - 45˚ .012(.305) ...

Page 13

... No licenses to patents or other intellectual prop- erty of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use as critical components in life suppor t devices or systems. ...

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