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PDF AT28C64X Data sheet ( Hoja de datos )
| Número de pieza | AT28C64X | |
| Descripción | 64K (8K x 8) Parallel EEPROMs | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
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Features
• Fast Read Access Time – 120 ns
• Fast Byte Write – 200 µs or 1 ms
• Self-timed Byte Write Cycle
– Internal Address and Data Latches
– Internal Control Timer
– Automatic Clear Before Write
• Direct Microprocessor Control
– READY/BUSY Open Drain Output
– DATA Polling
• Low Power
– 30 mA Active Current
– 100 µA CMOS Standby Current
• High Reliability
– Endurance: 104 or 105 Cycles
– Data Retention: 10 Years
• 5V ± 10% Supply
• CMOS and TTL Compatible Inputs and Outputs
• JEDEC Approved Byte-wide Pinout
• Commercial and Industrial Temperature Ranges
Description
The AT28C64 is a low-power, high-performance 8,192 words by 8-bit nonvolatile elec-
trically erasable and programmable read only memory with popular, easy-to-use fea-
tures. The device is manufactured with Atmel’s reliable nonvolatile technology.
(continued)
Pin Configurations
Pin Name
A0 - A12
CE
OE
WE
I/O0 - I/O7
RDY/BUSY
NC
DC
Function
Addresses
Chip Enable
Output Enable
Write Enable
Data Inputs/Outputs
Ready/Busy Output
No Connect
Don’t Connect
TSOP
Top View
PDIP, SOIC
Top View
RDY/BUSY (or 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 VCC
27 WE
26 NC
25 A8
24 A9
23 A11
22 OE
21 A10
20 CE
19 I/O7
18 I/O6
17 I/O5
16 I/O4
15 I/O3
LCC, PLCC
Top View
64K (8K x 8)
Parallel
EEPROMs
AT28C64
AT28C64X
OE
A11
A9
A8
NC
WE
VCC
RDY/BUSY (or NC)
A12
A7
A6
A5
A4
A3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
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
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.
Rev. 0001H–12/99
1
1 page  
AT28C64(X)
AC Read Characteristics
Symbol Parameter
tACC
tCE(1)
tOE(2)
tDF(3)(4)
tOH
Address to Output Delay
CE to Output Delay
OE to Output Delay
CE or OE High to Output Float
Output Hold from OE, CE or
Address, whichever occurred first
AC Read Waveforms(1)(2)(3)(4)
AT28C64-12
Min Max
120
120
10 60
0 45
0
AT28C64-15
Min Max
150
150
10 70
0 50
0
AT28C64-20
Min Max
200
200
10 80
0 55
0
AT28C64-25
Min Max
250
250
10 100
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 < 20 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 
AT28C64(X)
Packaging Information
32J, 32-lead, Plastic J-leaded Chip Carrier (PLCC)
Dimensions in Inches and (Millimeters)
JEDEC STANDARD MS-016 AE
.045(1.14) X 45˚ PIN NO. 1
IDENTIFY
.025(.635) X 30˚ - 45˚
.012(.305)
.008(.203)
.032(.813)
.026(.660)
.553(14.0)
.547(13.9)
.595(15.1)
.585(14.9)
.530(13.5)
.490(12.4)
.021(.533)
.013(.330)
.050(1.27) TYP
.300(7.62) REF
.430(10.9)
.390(9.90)
AT CONTACT
POINTS
.030(.762)
.015(.381)
.095(2.41)
.060(1.52)
.140(3.56)
.120(3.05)
.453(11.5)
.447(11.4)
.495(12.6)
.485(12.3)
.022(.559) X 45˚ MAX (3X)
28S, 28-lead, 0.300" Wide, Plastic Gull Wing Small
Outline (SOIC)
Dimensions in Inches and (Millimeters)
28P6, 28-lead, 0.600" Wide, Plastic Dual Inline
Package (PDIP)
Dimensions in Inches and (Millimeters)
JEDEC STANDARD MS-011 AB
1.47(37.3)
1.44(36.6)
PIN
1
.566(14.4)
.530(13.5)
.220(5.59)
MAX
SEATING
PLANE
.161(4.09)
.125(3.18)
.110(2.79)
.090(2.29)
.012(.305)
.008(.203)
1.300(33.02) REF
.090(2.29)
MAX
.005(.127)
MIN
.065(1.65)
.041(1.04)
.065(1.65)
.015(.381)
.022(.559)
.014(.356)
.630(16.0)
.590(15.0)
0 REF
15
.690(17.5)
.610(15.5)
28T, 28-lead, Plastic Thin Small Outline Package
(TSOP)
Dimensions in Millimeters and (Inches)*
INDEX
MARK
AREA
11.9 (0.469)
11.7 (0.461)
13.7 (0.539)
13.1 (0.516)
0.55 (0.022)
BSC
7.15 (0.281)
REF
8.10 (0.319)
7.90 (0.311)
0.27 (0.011)
0.18 (0.007)
1.25 (0.049)
1.05 (0.041)
0
5 REF
0.20 (0.008)
0.10 (0.004)
0.70 (0.028)
0.30 (0.012)
*Controlling dimension: millimeters
0.20 (0.008)
0.15 (0.006)
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet AT28C64X.PDF ] | |
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