28LV64A-30I/SO Microchip Technology, 28LV64A-30I/SO Datasheet

IC EEPROM 64KBIT 300NS 28SOIC

28LV64A-30I/SO

Manufacturer Part Number
28LV64A-30I/SO
Description
IC EEPROM 64KBIT 300NS 28SOIC
Manufacturer
Microchip Technology
Datasheet

Specifications of 28LV64A-30I/SO

Format - Memory
EEPROMs - Parallel
Memory Type
EEPROM
Memory Size
64K (8K x 8)
Speed
300ns
Interface
Parallel
Voltage - Supply
2.7 V ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Package / Case
28-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Request inventory verification / Request inventory verification
FEATURES
• 2.7V to 3.6V Supply
• Read Access Time—300 ns
• CMOS Technology for Low Power Dissipation
• Byte Write Time—3 ms
• Data Retention >200 years
• High Endurance - Minimum 100,000 Erase/Write
• Automatic Write Operation
• Data Polling
• Ready/Busy
• Chip Clear Operation
• Enhanced Data Protection
• Electronic Signature for Device Identification
• Organized 8Kx8 JEDEC Standard Pinout
• Available for Extended Temperature Ranges:
DESCRIPTION
The Microchip Technology Inc. 28LV64A is a CMOS 64K non-vol-
atile electrically Erasable PROM organized as 8K words by 8 bits.
The 28LV64A is accessed like a static RAM for the read or write
cycles without the need of 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 write cycle, the device will go to a busy state
and automatically clear and write the latched data using an inter-
nal control timer. To determine when the write cycle is complete,
the user has a choice of monitoring the Ready/Busy output or
using Data polling. The Ready/Busy pin is an open drain output,
which allows easy configuration in ‘wired-or’ systems. Alterna-
tively, Data polling allows the user to read the location last written
to when the write operation is complete. CMOS design and pro-
cessing enables this part to be used in systems where reduced
power consumption and reliability are required. A complete family
of packages is offered to provide the utmost flexibility in applica-
tions.
- 8 mA Active
- 50 A CMOS Standby Current
Cycles
- Internal Control Timer
- Auto-Clear Before Write Operation
- On-Chip Address and Data Latches
- V
- Pulse Filter
- Write Inhibit
- 28-pin Dual-In-Line Package
- 32-pin Chip Carrier (Leadless or Plastic)
- Commercial: 0°C to +70°C
- Industrial: -40°C to +85°C
2004 Microchip Technology Inc.
CC
Detector
64K (8K x 8) Low Voltage CMOS EEPROM
Preliminary
PACKAGE TYPES
BLOCK DIAGRAM
RDY/BSY
Rdy/
Busy
VSS
VCC
A12
CE
OE
WE
A0
I/O0
I/O1
I/O2
A12
I
I
I
I
I
I
I
I
I
I
I
V
A7
A6
A5
A4
A3
A2
A1
A0
SS
• Pin 1 indicator on PLCC on top of package
• 1
2
3
4
5
6
7
8
9
10
11
12
13
14
Obsolete Device
L
a
c
h
e
s
t
Data Protection
Auto Erase/Write
Program Voltage
Chip Enable/
Output Enable
Control Logic
28LV64A
Generation
Circuitry
Timing
Decoder
Decoder
28
27
26
25
24
23
22
21
20
19
18
17
16
15
X
Y
Vcc
WE
NC
A8
A9
A11
OE
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
I/O0
NC
A6
A5
A4
A3
A2
A1
A0
Data
Poll
5
6
7
8
9
10
11
12
13
I/O0...................I/O7
Input/Output
DS21113E-page 1
Cell Matrix
Y Gating
Buffers
64K bit
29
28
27
26
25
24
23
22
21
A8
A9
A11
NC
OE
A10
CE
I/O7
I/O6

Related parts for 28LV64A-30I/SO

28LV64A-30I/SO Summary of contents

Page 1

... The Microchip Technology Inc. 28LV64A is a CMOS 64K non-vol- atile electrically Erasable PROM organized as 8K words by 8 bits. The 28LV64A is accessed like a static RAM for the read or write cycles without the need of external components. During a “byte write”, the address and data are latched internally, freeing the microprocessor address and data bus for other operations ...

Page 2

... ELECTRICAL CHARACTERISTICS MAXIMUM RATINGS* VCC and input voltages w.r.t. V ...... -0. 6.25V SS Voltage on OE w.r.t. V ...................... -0.6V to +13.5V SS Voltage on A9 w.r.t. V ...................... -0.6V to +13.5V SS Output Voltage w.r.t. V ............... -0.6V to VCC+0.6V SS Storage temperature ..........................-65°C to +150°C Ambient temp. with power applied .....- +125 C *Notice: Stresses above those listed under “Maximum Ratings” may cause permanent damage to the device ...

Page 3

... CE t — 150 OFF t 0 — OH — 10M — Address Valid t CE(2) t OE(2) t ACC - t after the falling edge of CE without impact Preliminary 28LV64A = 0.6V +70 C (I) : Tamb = - +85 C Units Conditions (Note 1) ns (Note 1) cycles 25°C, Vcc = 5.0V, Block Mode (Note 2) t ...

Page 4

... OE Set-Up Time Data Valid Time Time to Device Busy Write Cycle Time (28LV64A) Note 1: A write cycle can be initiated going low, whichever occurs last. The data is latched on the positive edge WE, whichever occurs first. 2: Data must be valid within 1000ns max. after a write cycle is initiated and must be stable at least until t after the positive edge CE, whichever occurs first ...

Page 5

... TABLE 1-5: SUPPLEMENTARY CONTROL Mode Chip Clear Extra Row Read Extra Row Write Note 12.0V ± 0.5V H 2004 Microchip Technology Inc. t ACC WPH Preliminary 28LV64A Last Written Address Valid True Data Out I/O7 Out 10ms 1µ 12.0V ±0. I Data Out Data DS21113E-page 5 ...

Page 6

... WE, the address information is latched. On rising edge, the data and the control pins Rdy/Busy (1) (CE and OE) are latched. The Ready/Busy pin goes to a logic low level indicating that the 28LV64A write cycle which signals the microprocessor host that H the system bus is free for other activity ...

Page 7

... Product Identification System To order or to obtain information (e.g., on pricing or delivery), please use the listed part numbers, and refer to the factory or the listed sales offices. 28LV64A – – Package: Temperature Range: Access Time: Shipping: Option: Device: 2004 Microchip Technology Inc. 28LV64A ...

Page 8

... NOTES: DS21113E-page 8 Preliminary 2004 Microchip Technology Inc. ...

Page 9

... PICLAB, PICtail, PowerCal, PowerInfo, PowerMate, PowerTool, rfLAB, rfPICDEM, Select Mode, Smart Serial, SmartTel and Total Endurance are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. ...

Page 10

... Via Salvatore Quasimodo, 12 20025 Legnano (MI) Milan, Italy Tel: 39-0331-742611 Fax: 39-0331-466781 Netherlands Waegenburghtplein 4 NL-5152 JR, Drunen, Netherlands Tel: 31-416-690399 Fax: 31-416-690340 United Kingdom 505 Eskdale Road Winnersh Triangle Wokingham Berkshire, England RG41 5TU Tel: 44-118-921-5869 Fax: 44-118-921-5820 07/12/04  2004 Microchip Technology Inc. ...

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