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27C04A 데이터시트 PDF




Microchip Technology에서 제조한 전자 부품 27C04A은 전자 산업 및 응용 분야에서
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부품번호 27C04A 기능
기능 4K (512 x 8) CMOS EEPROM
제조업체 Microchip Technology
로고 Microchip Technology 로고


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27C04A 데이터시트, 핀배열, 회로
28C04A
4K (512 x 8) CMOS EEPROM
FEATURES
• Fast Read Access Time—150 ns
• CMOS Technology for Low Power Dissipation
- 30 mA Active
- 100 µA Standby
• Fast Byte Write Time—200 µs or 1 ms
• Data Retention >200 years
• Endurance - Minimum 104 Erase/Write Cycles
- Automatic Write Operation
- Internal Control Timer
- Auto-Clear Before Write Operation
- On-Chip Address and Data Latches
• Data Polling
• Chip Clear Operation
• Enhanced Data Protection
- VCC Detector
- Pulse Filter
- Write Inhibit
• 5-Volt-Only Operation
• Organized 512x8 JEDEC standard pinout
- 24-pin Dual-In-Line Package
- 32-pin PLCC Package
• Available for Extended Temperature Ranges:
- Commercial: 0˚C to +70˚C
- Industrial: -40˚C to +85˚C
DESCRIPTION
The Microchip Technology Inc. 28C04A is a CMOS 4K
non-volatile electrically Erasable and Programmable
Read Only Memory (EEPROM). The 28C04A 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. Following the initiation of write cycle,
the device will go to a busy state and automatically
clear and write the latched data using an internal con-
trol timer. To determine when a write cycle is complete,
the 28C04A uses Data polling. Data polling allows the
user to read the location last written to when the write
operation is complete. CMOS design and processing
enables this part to be used in systems where reduced
power consumption and reliability are required. A com-
plete family of packages is offered to provide the utmost
flexibility in applications.
PACKAGE TYPES
DIP
A7 • 1
A6 2
A5 3
A4 4
A3 5
A2 6
A1 7
A0 8
I/O0 9
I/O1 10
I/O2 11
VSS 12
24 Vcc
23 A8
22 NC
21 WE
20 OE
19 NC
18 CE
17 I/O7
16 I/O6
15 I/O5
14 I/O4
13 I/O3
PLCC
A6 5
A5 6
A4 7
A3 8
A2 9
A1 10
A0 11
NC 12
I/O0 13
29 A8
28 NC
27 NC
26 NC
25 OE
24 NC
23 CE
22 I/O7
21 I/O6
Pin 1 indicator on PLCC on top of package
BLOCK DIAGRAM
I/O0 I/O7
VSS
VCC
Data Protection
Circuitry
CE Chip Enable/
Output Enable
OE Control Logic
WE
Auto Erase/Write Data
Input/Output
Timing
Poll Buffers
Program Voltage
Generation
A0
Y
L Decoder
a
t
c
h
eX
s Decoder
Y Gating
4K bit
Cell Matrix
A8
© 1996 Microchip Technology Inc.
This document was created with FrameMaker 4 0 4
DS11126F-page 1




27C04A pdf, 반도체, 판매, 대치품
28C04A
TABLE 1-4: BYTE WRITE AC CHARACTERISTICS
AC Testing Waveform:
Output Load:
Input Rise/Fall Times:
Ambient Temperature:
VIH = 2.4V; VIL = 0.45V; VOH = 2.0V; VOL = 0.8V
1 TTL Load + 100 pF
20 nsec
Commercial (C): Tamb= 0˚C to 70˚C
Industrial (I): Tamb= -40˚C to 85˚C
Parameter
Symbol
Min
Max Units Remarks
Address Set-Up Time
tAS 10
ns
Address Hold Time
tAH 50
ns
Data Set-Up Time
tDS 50
ns
Data Hold Time
tDH 10
ns
Write Pulse Width
tWPL
100
ns Note 1
Write Pulse High Time
tWPH
50
ns
OE Hold Time
tOEH
10
ns
OE Set-Up Time
tOES
10
ns
Data Valid Time
tDV
1000
ns Note 2
Write Cycle Time (28C04A)
tWC
1 ms 0.5 ms typical
Write Cycle Time (28C04AF)
tWC
200 µs 100 µs typical
Note 1: A write cycle can be initiated be CE or WE going low, whichever occurs last. The data is latched on the pos-
itive edge of CE or 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 tDH after
the positive edge of WE or CE, whichever occurs first.
FIGURE 1-2: PROGRAMMING WAVEFORMS
VIH
Address
VIL
VIH
CE, WE
VIL
VIH
Data In
VIL
VIH
OE
VIL
tAS tAH
t WPL
tDV tDS
t OES
t DH
t OEH
DS11126F-page 4
© 1996 Microchip Technology Inc.

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27C04A 전자부품, 판매, 대치품
28C04A
28C04A 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.
28C04A F T – 15 I /P
Package:
L = Plastic Leaded Chip Carrier (PLCC)
P = Plastic DIP (600mill)
Temperature Blank = 0°C to +70°C
Range:
I = -40°C to +85°C
Access Time:
15 150 ns
20 200 ns
25 250 ns
Shipping:
Blank Tube
T Tape and Reel “L” only
Option:
Blank = twc = 1ms
F = twc = 200 µs
Device:
28C04A 512 x 8 CMOS EEPROM
© 1996 Microchip Technology Inc.
DS11126F-page 7

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