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NM27C020 2,097,152-Bit (256K x 8) UV Erasable CMOS EPROM

NM27C020
2,097,152-Bit (256K x 8) UV Erasable CMOS EPROM

General Description

The NM27C020 is a high speed 2 Megabit CMOS UV-EPROM
manufactured on Fairchild's advanced sub-micron technology.
Utilizing the AMG architecture, this advanced CMOS process
delivers high speeds while consuming low power.

The NM27C020 provides microprocessor-based systems exten-
sive storage capacity for large portions of operating systems and
application software. Its 100ns access time provides no-wait-state
operation with high-performance CPUs.

The NM27C020 offers a single chip solution for the code storage
requirements of 100% firmware-based equipment. Frequently-
used software routines are quickly executed from EPROM stor-
age, greatly enhancing system utility.

The NM27C020 is manufactured using Fairchild's advanced
CMOS AMG EPROM technology, and is one member of a high
density Fairchild EPROM series family which range in densities up
to 4Mb.

Block Diagram

July 1998

Features

High performance CMOS
-- 100 ns access time

Simplified upgrade path
--V

and PGM are "Don't Care" during normal read

operation

Manufacturers identification code

JEDEC Standard Pin Configuration
-- 32-pin CERDIP package
-- 32-pin PLCC package
-- 32-pin PDIP package

Š 1998 Fairchild Semiconductor Corporation

Output Enable,

Chip Enable, and

Program Logic

Y Decoder

X Decoder

. .

. . . . . . .

Output

Buffers

2,097,152-Bit

Cell Matrix

Data Outputs O0 - O7

VCC

GND

VPP

PGM

A0 - A17

Address

Inputs

DS010835-1

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NM27C020 2,097,152-Bit (256K x 8) UV Erasable CMOS EPROM

Connection Diagrams

Commercial Temperature Range
(0

C to +70

C) V

= 5V

10%

Parameter/Order Number

Access Time (ns)

NM27C020 Q, V, N 100

100

NM27C020 Q, V, N 120

120

NM27C020 Q, V, N 150

150

All versions are guaranteed to function at slower speeds.

Extended Temperature Range
(-40

C to +85

C) V

= 5V

10%

Parameter/Order Number

Access Time (ns)

NM27C020 QE, VE, TE, NE 120

120

NM27C020 QE, VE, TE, NE 150

150

PLCC Pin Configuration

Top View

Pin Names

A0 A17

Addresses

Chip Enable

Output Enable

O0 O7

Outputs

PGM

Program

Don't Care (During Read)

XX/V

A16
A15
A12

A7
A6
A5
A4
A3
A2
A1
A0

O0
O1
O2

GND

A15
A12

A7
A6
A5
A4
A3
A2
A1
A0

O0
O1
O2

GND

27C512

27C256

A12

A7
A6
A5
A4
A3
A2
A1
A0

O0
O1
O2

GND

27C256

27C512

XX/PGM

A17
A14
A13
A8
A9
A11
OE

A10
CE

O7
O6
O5
O4
O3

A14
A13

A8
A9

A11

A10

CE/PGM

O7
O6
O5
O4
O3

A14
A13

A8
A9

A11

OE/V

A10

CE/PGM

O7
O6
O5
O4
O3

XX/V

A16
A15
A12

A7
A6
A5
A4
A3
A2
A1
A0

O0
O1
O2

GND

27C040

XX/V

A16
A15
A12

A7
A6
A5
A4
A3
A2
A1
A0

O0
O1
O2

GND

27C010

A19

A16
A15
A12

A7
A6
A5
A4
A3
A2
A1
A0

O0
O1
O2

GND

27C080

27C040

27C080

A18
A17
A14
A13

A8
A9

A11

A10

O7
O6
O5
O4
O3

A18
A17
A14
A13

A8
A9

A11

OE/V

A10

CE/PGM

O7
O6
O5
O4
O3

27C010

XX/PGM

A14
A13

A8
A9

A11

A10

CE/PGM

O7
O6
O5
O4
O3

Note:

Compatible EPROM pin configurations are shown in the blocks adjacent to the NM27C020 pins.

A14
A13
A8
A9
A11
OE
A10
CE
O7

A7
A6
A5
A4
A3
A2
A1
A0

A12

A15

A16

VPP

VCC

PGM

A17

GND

5
6
7
8
9
10
11
12
13

29
28
27
26
25
24
23
22
21

14 15 16 17 18 19 20

4 3 2 1 32 31 30

DS010835-10

DS010835-3

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NM27C020 2,097,152-Bit (256K x 8) UV Erasable CMOS EPROM

Absolute Maximum Ratings (Note 1)

Storage Temperature

-65

C to +125

All Input Voltage Except A9 with

Respect to Ground (Note 13)

-0.6V to +7V

and A9 with Respect to Ground

-0.6V to +14V

Supply Voltage with

Respect to Ground

-0.6V to +7V

ESD Protection

>2000V

All Output Voltages with

Respect to Ground (Note 13)

+ 10V to GND -0.6V

Operating Range

Range

Temperature

Tolerance

Commercial

C to +70

+5V

Industrial

-40

C to +85

+5V

10%

DC Read Characteristics

Over Operating Range with V

= V

Symbol

Parameter

Test Conditions

Min

Max

Units

Input Low Level

-0.5

0.8

Input High Level

2.0

Output Low Voltage

= 2.1 mA

-0.4

Output High Voltage

= -400

3.5

SB1

(Note 4)

Standby Current (CMOS)

CE = V

0.3V

100

SB2

Standby Current (TTL)

CE = V

(Note 2)

Active Current

CE, OE = V

Commercial

I/O = 0 mA, f = 5 MHz

Industrial

Inputs = V

or V

Supply Current

= V

VPP

Read Voltage

VCC - 0.4

Input Load Current

= 5.5 or GND

-1

Output Leakage Current

OUT

= 5.5V or GND

-10

AC Read Characteristics

Over Operating Range with V

= V

Symbol

Parameter

100

120

150

Units

Min

Max

Min

Max

Min

Max

ACC

Address to Output Delay

100

120

150

CE to Output Delay

100

120

150

OE to Output Delay

(Note 3)

Output Disable to Output Float

Output Hold from Addresses, CE

or OE , Whichever Occurred First

Note 1: Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of
the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions
for extended periods of time may affect device reliability.

Note 2: The supply current is the sum of I

and I

. The maximum current value is with Outputs O0 to O7 unloaded.

Note 3: This parameter is only sampled and is not 100% tested. Output Float is defined as the point where data is no longer driven-see timing diagram.

Note 4: CMOS inputs: V

= GND 10.3V, V

= V

10.3V.

Part Number NM27C020