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PDF AT28C64E Data sheet ( Hoja de datos )
| Número de pieza | AT28C64E | |
| Descripción | 64K (8K x 8) Parallel EEPROMs | |
| Fabricantes | ATMEL Corporation | |
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Features
• Fast Read Access Time – 120 ns
• Fast Byte Write – 200 µs
• 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: 105 Cycles
– Data Retention: 10 Years
• 5V ± 10% Supply
• CMOS and TTL Compatible Inputs and Outputs
• JEDEC Approved Byte-wide Pinout
• Industrial Temperature Ranges
• Green (Pb/Halide-Free) Packaging Option
64K (8K x 8)
Parallel
EEPROMs
AT28C64E
1. Description
The AT28C64E is a low-power, high-performance 8,192 words by 8-bit nonvolatile
electrically erasable and programmable read-only memory with popular, easy-to-use
features. The device is manufactured with Atmel’s reliable nonvolatile technology.
The AT28C64E is accessed like a Static RAM for the read or write cycles without the
need for external components. During a byte write, the address and data are latched
internally, freeing the microprocessor address and data bus for other operations. Fol-
lowing the initiation of a write cycle, the device will go to a busy state and
automatically clear and write the latched data using an internal control timer. The
device includes two methods for detecting the end of a write cycle, level detection of
RDY/BUSY (unless pin 1 is N.C.) and 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.
The CMOS technology offers fast access times of 120 ns at low power dissipation.
When the chip is deselected, the standby current is less than 100 µA.
Atmel’s AT28C64E has additional features to ensure high quality and manufacturabil-
ity. The device utilizes error correction internally for extended endurance and for
improved data retention characteristics. An extra 32 bytes of EEPROM are available
for device identification or tracking.
0001I–PEEPR–10/06
1 page  
AT28C64E
6. DC and AC Operating Range
Operating Temperature (Case)
VCC Power Supply
AT28C64E-12
-40°C - 85°C
5V ± 10%
7. Operating Modes
Mode
Read
Write(2)
Standby/Write Inhibit
Write Inhibit
Write Inhibit
Output Disable
Chip Erase
Notes: 1. X can be VIL or VIH.
2. Refer to AC programming waveforms.
3. VH = 12.0V ± 0.5V.
CE
VIL
VIL
VIH
X
X
X
VIL
OE
VIL
VIH
X(1)
X
VIL
VIH
VH(3)
8. DC Characteristics
Symbol
ILI
ILO
ISB1
ISB2
ICC
VIL
VIH
VOL
VOH
Parameter
Input Load Current
Output Leakage Current
VCC Standby Current CMOS
VCC Standby Current TTL
VCC Active Current AC
Input Low Voltage
Input High Voltage
Output Low Voltage
Output High Voltage
Condition
VIN = 0V to VCC + 1V
VI/O = 0V to VCC
CE = VCC - 0.3V to VCC + 1.0V
CE = 2.0V to VCC + 1.0V
f = 5 MHz; IOUT = 0 mA
CE = VIL
IOL = 2.1 mA
= 4.0 mA for RDY/BUSY
IOH = -400 µA
Min
2.0
2.4
WE
VIH
VIL
X
VIH
X
X
VIL
Max
10
10
100
3
45
0.8
0.45
I/O
DOUT
DIN
High Z
High Z
High Z
Units
µA
µA
µA
mA
mA
V
V
V
V
0001I–PEEPR–10/06
5
5 Page 
19. Ordering Information
19.1 Standard Package
tACC
ICC (mA)
(ns) Active Standby
120 45
0.1
Ordering Code
AT28C64E-12JI
AT28C64E-12PI
AT28C64E-12SI
AT28C64E-12TI
19.2 Green Package (Pb/Halide-free)
tACC
ICC (mA)
(ns) Active Standby Ordering Code
120 45 0.1 AT28C64E-12JU
AT28C64E-12PU
AT28C64E-12SU
AT28C64E-12TU
19.3 Package Type
Package
32J
28P6
28S
28T
Package
32J
28P6
28S
28T
32J
28P6
28S
28T
32-lead, Plastic J-leaded Chip Carrier (PLCC)
28-lead, 0.600" Wide, Plastic Dull Inline Package (PDIP)
28-lead, 0.300" Wide, Plastic Gull Wing, Small Outline (SOIC)
28-lead, Plastic Thin Small Outline Package (TSOP)
20. Valid Part Numbers
The following table lists standard Atmel® products that can be ordered.
Device Numbers
Speed
Package and Temperature Combinations
AT28C64E
12 JI, JU, PI, PU, SI, SU, TI, TU
21. Die Products
Reference Section: Parallel EEPROM Die Products
AT28C64E
Operation Range
Industrial
(-40° C to 85° C)
Operation Range
Industrial
(-40° C to 85° C)
0001I–PEEPR–10/06
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet AT28C64E.PDF ] | |
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