900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf






Advanced Micro Devices

D27C256 Datasheet Preview

D27C256 Datasheet

AMD27C256

No Preview Available !

www.DataSheet4U.com
FINAL
Am27C256
256 Kilobit (32,768 x 8-Bit) CMOS EPROM
Advanced
Micro
Devices
DISTINCTIVE CHARACTERISTICS
s Fast access time
55 ns
s Low power consumption
20 µA typical CMOS standby current
s JEDEC-approved pinout
s Single +5 V power supply
s ±10% power supply tolerance available
s 100% Flashrite programming
— Typical programming time of 4 seconds
GENERAL DESCRIPTION
The Am27C256 is a 256K-bit ultraviolet erasable pro-
grammable read-only memory. It is organized as 32K
words by 8 bits per word, operates from a single +5 V
supply, has a static standby mode, and features fast sin-
gle address location programming. Products are avail-
able in windowed ceramic DIP packages as well as plas-
tic one time programmable (OTP) PDIP, TSOP, and
PLCC packages.
Typically, any byte can be accessed in less than 55 ns,
allowing operation with high-performance microproces-
sors without any WAIT states. The Am27C256 offers
separate Output Enable (OE) and Chip Enable (CE)
BLOCK DIAGRAM
VCC
VSS
VPP
OE
Output Enable
Chip Enable
CE and
Prog Logic
s Latch-up protected to 100 mA from –1 V to
VCC + 1 V
s High noise immunity
s Versatile features for simple interfacing
— Both CMOS and TTL input/output
compatibility
— Two line control functions
s Standard 28-pin DIP, PDIP, 32-pin TSOP and
PLCC packages
controls, thus eliminating bus contention in a multiple
bus microprocessor system.
AMD’s CMOS process technology provides high speed,
low power, and high noise immunity. Typical power con-
sumption is only 80 mW in active mode, and 100 µW in
standby mode.
All signals are TTL levels, including programming sig-
nals. Bit locations may be programmed singly, in blocks,
or at random. The Am27C256 supports AMD’s Flashrite
programming algorithm (100 µs pulses) resulting in typi-
cal programming time of 4 seconds.
Data Outputs
DQ0–DQ7
Output
Buffers
Y
Decoder
Y
Gating
A0–A14
Address
Inputs
X
Decoder
262,144
Bit Cell
Matrix
2-32
08007H-1
Publication# 08007 Rev. H Amendment /0
Issue Date: May 1995




Advanced Micro Devices

D27C256 Datasheet Preview

D27C256 Datasheet

AMD27C256

No Preview Available !

www.DataSheet4U.com
PRODUCT SELECTOR GUIDE
Family Part No.
Ordering Part No:
VCC ± 5%
VCC ± 10%
Max Access Time (ns)
CE (E) Access Time (ns)
OE (G) Access Time (ns)
-55
55
55
35
-70
70
70
40
CONNECTION DIAGRAMS
Top View
DIP
VPP
A12
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
VSS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 VCC
27 A14
26 A13
25 A8
24 A9
23 A11
22 OE (G)
21 A10
20 CE (E)
19 DQ7
18 DQ6
17 DQ5
16 DQ4
15 DQ3
08007H-2
Notes:
1. JEDEC nomenclature is in parentheses.
AMD
Am27C256
-90
-120
-150
90 120 150
90 120 150
40 50 50
-200
200
200
50
-255
250
250
50
PLCC
A6
A5
A4
A3
A2
A1
A0
NC
DQ0
4 3 2 1 32 31 30
5 29
6 28
7 27
8 26
9 25
10 24
11 23
12 22
13 21
14 15 16 17 18 19 20
A8
A9
A11
NC
OE (G)
A10
CE (E)
DQ7
DQ6
08007H-3
Am27C256
2-33


Part Number D27C256
Description AMD27C256
Maker Advanced Micro Devices
Total Page 12 Pages
PDF Download

D27C256 Datasheet PDF

View PDF for Mobile








Similar Datasheet

1 D27C256 AMD27C256
Advanced Micro Devices





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy