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PDF 28C64 Data sheet ( Hoja de datos )
| Número de pieza | 28C64 | |
| Descripción | 64K 8K x 8 CMOS E2PROM | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
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Features
• Fast Read Access Time – 150 ns
• Automatic Page Write Operation
– Internal Address and Data Latches for 64 Bytes
• Fast Write Cycle Times
– Page Write Cycle Time: 10 ms Maximum
– 1 to 64-byte Page Write Operation
• Low Power Dissipation
– 40 mA Active Current
– 100 µA CMOS Standby Current
• Hardware and Software Data Protection
• DATA Polling and Toggle Bit for End of Write Detection
• High Reliability CMOS Technology
– Endurance: 100,000 Cycles
– Data Retention: 10 Years
• Single 5V ± 10% Supply
• CMOS and TTL Compatible Inputs and Outputs
• JEDEC Approved Byte-wide Pinout
• 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 µA.
(continued)
Pin Configurations
Pin Name
A0 - A12
CE
OE
WE
I/O0 - I/O7
NC
DC
Function
Addresses
Chip Enable
Output Enable
Write Enable
Data Inputs/Outputs
No Connect
Don’t Connect
PLCC
Top View
A6 5
A5 6
A4 7
A3 8
A2 9
A1 10
A0 11
NC 12
I/O0 13
29 A8
28 A9
27 A11
26 NC
25 OE
24 A10
23 CE
22 I/O7
21 I/O6
Note: PLCC package pins 1 and 17 are
DON’T CONNECT.
OE
A11
A9
A8
NC
WE
VCC
NC
A12
A7
A6
A5
A4
A3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
PDIP, SOIC
Top View
NC
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O0
I/O1
I/O2
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
TSOP
Top View
VCC
WE
NC
A8
A9
A11
OE
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
28 A10
27 CE
26 I/O7
25 I/O6
24 I/O5
23 I/O4
22 I/O3
21 GND
20 I/O2
19 I/O1
18 I/O0
17 A0
16 A1
15 A2
64K (8K x 8)
Parallel
EEPROM with
Page Write and
Software Data
Protection
AT28C64B
Rev. 0270H–12/99
1
1 page  
AT28C64B
AC Read Characteristics
Symbol
tACC
tCE(1)
tOE(2)
tDF(3)(4)
tOH
Parameter
Address to Output Delay
CE to Output Delay
OE to Output Delay
CE or OE to Output Float
Output Hold from OE, CE or
Address, whichever occurred first
AC Read Waveforms(1)(2)(3)(4)
AT28C64B-15
Min Max
150
150
0 70
0 50
0
AT28C64B-20
Min Max
200
200
0 80
0 55
0
AT28C64B-25
Min Max
250
250
0 100
0 60
0
Units
ns
ns
ns
ns
ns
Notes:
1. CE may be delayed up to tACC - tCE after the address transition without impact on tACC.
2. OE may be delayed up to tCE - tOE after the falling edge of CE without impact on tCE or by tACC - tOE after an address change
without impact on tACC.
3. tDF is specified from OE or CE whichever occurs first (CL = 5 pF).
4. This parameter is characterized and is not 100% tested.
Input Test Waveforms and
Measurement Level
Output Test Load
tR, tF < 5 ns
Pin Capacitance
f = 1 MHz, T = 25°C(1)
Symbol
Typ
Max
CIN
COUT
Note:
46
8 12
1. This parameter is characterized and is not 100% tested.
Units
pF
pF
Conditions
VIN = 0V
VOUT = 0V
5
5 Page 
AT28C64B
Ordering Information(1)
tACC
ICC (mA)
(ns)
Active Standby
Ordering Code
150 40 0.1 AT28C64B-15JC
AT28C64B-15PC
AT28C64B-15SC
AT28C64B-15TC
AT28C64B-15JI
AT28C64B-15PI
AT28C64B-15SI
AT28C64B-15TI
200 40 0.1 AT28C64B-20JC
AT28C64B-20PC
AT28C64B-20SC
AT28C64B-20TC
AT28C64B-20JI
AT28C64B-20PI
AT28C64B-20SI
AT28C64B-20TI
250 40 0.1 AT28C64B-25JC
AT28C64B-25PC
AT28C64B-25SC
AT28C64B-25TC
AT28C64B-25JI
AT28C64B-25PI
AT28C64B-25SI
AT28C64B-25TI
Note: 1. See “Valid Part Numbers” table below.
Valid Part Numbers
The following table lists standard Atmel products that can be ordered.
Package
32J
28P6
28S
28T
32J
28P6
28S
28T
32J
28P6
28S
28T
32J
28P6
28S
28T
32J
28P6
28S
28T
32J
28P6
28S
28T
Device Numbers
Speed
Package and Temperature Combinations
AT28C64B
15 JC, JI, PC, PI, SC, SI, TC, TI
AT28C64B
20 JC, JI, PC, PI, SC, SI, TC, TI
AT28C64B
25 JC, JI, PC, PI, SC, SI, TC, TI
AT28C64B
Die Products
–W
Reference Section: Parallel EEPROM Die Products
32J
28P6
28S
28T
W
Package Type
32-lead, Plastic J-leaded Chip Carrier (PLCC)
28-lead, 0.600" Wide, Plastic Dual Inline Package (PDIP)
28-lead, 0.300" Wide, Plastic Gull Wing Small Outline (SOIC)
28-lead, Plastic Thin Small Outline Package (TSOP)
Die
Operation Range
Commercial
(0°C to 70°C)
Industrial
(-40°C to 85°C)
Commercial
(0°C to 70°C)
Industrial
(-40°C to 85°C)
Commercial
(0°C to 70°C)
Industrial
(-40°C to 85°C)
11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet 28C64.PDF ] | |
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