|
|
PDF NM27C256 Data sheet ( Hoja de datos )
| Número de pieza | NM27C256 | |
| Descripción | 262 /144-Bit (32K x 8) High Performance CMOS EPROM | |
| Fabricantes | Fairchild | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de NM27C256 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
|
No Preview Available !
July 1998
NM27C256
262,144-Bit (32K x 8) High Performance CMOS EPROM
General Description
The NM27C256 is a 256K Electrically Programmable Read Only
Memory. It is manufactured in Fairchild’s latest CMOS split gate
EPROM technology which enables it to operate at speeds as fast
as 90 ns access time over the full operating range.
The NM27C256 provides microprocessor-based systems exten-
sive storage capacity for large portions of operating system and
application software. Its 90 ns access time provides high speed
operation with high-performance CPUs. The NM27C256 offers a
single chip solution for the code storage requirements of 100%
firmware-based equipment. Frequently-used software routines
are quickly executed from EPROM storage, greatly enhancing
system utility.
The NM27C256 is configured in the standard EPROM pinout
which provides an easy upgrade path for systems which are
currently using standard EPROMs.
The NM27C256 is one member of a high density EPROM Family
which range in densities up to 4 Mb.
Features
s High performance CMOS
— 90 ns access time
s JEDEC standard pin configuration
— 28-pin PDIP package
— 32-pin chip carrier
— 28-pin CERDIP package
s Drop-in replacement for 27C256 or 27256
s Manufacturer’s identification code
Block Diagram
VCC
GND
VPP
OE
CE/PGM
Output Enable
and Chip Enable Logic
Data Outputs O0 - O7
Output
Buffers
Y Decoder
A0 - A14
Address
Inputs
X Decoder
Y Gating
© 1998 Fairchild Semiconductor Corporation
1
DS010833-1
www.fairchildsemi.com
1 page  
Programming Characteristics (Note 12) (Note 13) (Note 14) (Note 15) (Continued)
Symbol
tAS
tOES
tVPS
tVCS
tDS
tAH
tDH
tDF
tPW
tOE
IPP
ICC
TA
VCC
VPP
tFR
VIL
VIH
tIN
tOUT
Parameter
Address Setup Time
OE Setup Time
VPP Setup Time
VCC Setup Time
Data Setup Time
Address Hold Time
Data Hold Time
Output Enable to Output
Float Delay
Program Pulse Width
Data Valid from OE
VPP Supply Current
during Programming Pulse
VCC Supply Current
Temperature Ambient
Power Supply Voltage
Programming Supply Voltage
Input Rise, Fall Time
Input Low Voltage
Input High Voltage
Input Timing Reference Voltage
Output Timing Reference Voltage
Conditions
CE = VIL
CE = VIL
CE = VIL
Min
1
1
1
1
1
0
1
0
45
20
6.25
12.5
5
2.4
0.8
0.8
Typ Max
50
25
6.5
12.75
0.0
4.0
60
105
100
30
50
30
6.75
13.0
0.45
2.0
2.0
Programming Waveforms (Note 14)
PROGRAM
ADDRESSES 2.0V
0.8V
2.0V
DATA
0.8V
VCC 5.25V
ADDRESS N
tAS
DATA IN STABLE
ADD N
tDS tDH
tVCS
PROGRAM
VERIFY
tAH
DATA OUT VALID
ADD N
tDF
Units
µs
µs
µs
µs
µs
µs
µs
ns
µs
ns
mA
mA
°C
V
V
ns
V
V
V
V
VPP 12.75V
tVPS
2.0V
CE 0.8V
2.0V
OE 0.8V
tOES
tOE
tPW
DS010833-5
Note 12: Fairchild’s standard product warranty applies to devices programmed to specifications described herein.
Note 13: VCC must be applied simultaneously or before VPP and removed simultaneously or after VPP. The EPROM must not be inserted into or removed from a board with
voltage applied to VPP or VCC.
Note 14: The maximum absolute allowable voltage which may be applied to the VPP pin during programming is 14V. Care must be taken when switching the VPP supply to
prevent any overshoot from exceeding this 14V maximum specification. At least a 0.1 µF capacitor is required across VPP, VCC to GND to suppress spurious voltage transients
which may damage the device.
Note 15: During power up the PGM pin must be brought high (≥ VIH) either coincident with or before power is applied to VPP.
5 www.fairchildsemi.com
5 Page 
Life Support Policy
Fairchild's products are not authorized for use as critical components in life support devices or systems without the express written
approval of the President of Fairchild Semiconductor Corporation. As used herein:
1. Life support devices or systems are devices or systems which,
(a) are intended for surgical implant into the body, or (b) support
or sustain life, and whose failure to perform, when properly
used in accordance with instructions for use provided in the
labeling, can be reasonably expected to result in a significant
injury to the user.
2. A critical component is any component of a life support device
or system whose failure to perform can be reasonably ex-
pected to cause the failure of the life support device or system,
or to affect its safety or effectiveness.
Fairchild Semiconductor
Americas
Customer Response Center
Tel. 1-888-522-5372
Fairchild Semiconductor
Europe
Fax: +44 (0) 1793-856858
Deutsch Tel: +49 (0) 8141-6102-0
English Tel: +44 (0) 1793-856856
Français Tel: +33 (0) 1-6930-3696
Italiano Tel: +39 (0) 2-249111-1
Fairchild Semiconductor
Hong Kong
8/F, Room 808, Empire Centre
68 Mody Road, Tsimshatsui East
Kowloon. Hong Kong
Tel; +852-2722-8338
Fax: +852-2722-8383
Fairchild Semiconductor
Japan Ltd.
4F, Natsume Bldg.
2-18-6, Yushima, Bunkyo-ku
Tokyo, 113-0034 Japan
Tel: 81-3-3818-8840
Fax: 81-3-3818-8841
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications.
11 www.fairchildsemi.com
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet NM27C256.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| NM27C256 | 262 /144-Bit (32K x 8) High Performance CMOS EPROM | Fairchild |
| NM27C256 | 262 /144-Bit (32K x 8) High Performance CMOS EPROM |  National |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |