Datasheet AM27X024-75PC, AM27X024-75JI, AM27X024-75JC, AM27X024-255PC, AM27X024-255JI Datasheet (AMD Advanced Micro Devices)

FINAL

Publication# 15652 Rev: D Amendment/0
Issue Date: May 1998

Am27X020

2 Megabit (256 K x 8-Bit) CMOS ExpressROM Device

DISTINCTIVE CHARACTERISTICS

■ As an OTP EPROM alternative:

— Factory optimized programming
— Fully tested and guaranteed

■ As a Mask ROM alternative:

— Shorter leadtime
— Lower volume per code

■ Fast access time

— 75 ns

■ Single +5 V power supply

■ Compatible wit h JEDEC-approved EPROM

pinout

■ ±10% power supply tolerance

■ High noise immunity

■ Low power dissipation

— 100 µA maximum CMOS standby current

■ Av ailable in Plastic Dual-In-line Pac kage (PDIP)

and Plastic Leaded Chip Carrier (PLCC)

■ Latch-up protected to 100 mA from –1 V to

V

CC

+ 1 V

■ Versatile features for simpl e int erfacing

— Both CMOS and TTL input/output compatibility
— Two line control functions

GENERAL DESCRIPTION

The Am27X020 is a factory programmed and tested
OTP EPROM. It is progra mmed after pac kaging prior to
final test. Every device is rigorously tested under AC
and DC operating conditions to your stable code. It is
organized as 2 56 Kwords by 8 bits per word and is
available in plastic dual in- line packages (PDIP), as
well as plastic leaded chip carrier (PLCC) packages.
ExpressROM devices provide a board-ready memory
solution for medium to high volume codes with short
leadtimes. This offers manufacturers a cost-effective
and flexible alternativ e to O TP EPROMs and mask pro­grammed ROMs.

Data can be accessed as fast as 75 ns, allowing
high-performance microprocessors to operate with re­duced WAIT states. The device offers separate Output
Enable (OE#) and Chip Enable (CE#) 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 consumption is only 100 mW in active mode,
and 100 µW in standby mode.

BLOCK DIAGRAM

15652D-1

A0–A17
Address

Inputs

CE#

OE#

V

CC

V

SS

Data Outputs DQ0–DQ7

Output
Buffers

Y

Gating

2,097,152

Bit Cell

Matrix

X

Decoder

Y

Decoder

Output Enable

Chip Enable

and

Prog Logic

2 Am27X020

PRODUCT SELECTOR GUIDE

CONNECTION DIAGRAMS
Top View

DIP PLCC

Notes:.

1. JEDEC nomenclature is in parenthesis.

2. Don’t use (DU) for PLCC.

PIN DESIGNATIONS

A0–A17 = Address Inputs
CE# (E#) = Chip Enable Input
DQ0–DQ7 = Data Input/Outputs
OE# (G#) = Output Enable Input
PGM# (P#) = Program Enable Input
V

CC

=VCC Supply Voltage

V

PP

= Program Voltage Input

V

SS

= Ground

NC = No Internal Connection

LOGIC SYMBOL

Family Part Number Am27X020

Speed Options

V

CC

= 5.0 V ± 5% -255

V

CC

= 5.0 V ± 10% -75 -90 -120 -150 -200
Max Access Time (ns) 70 90 120 150 200 250
CE# (E#) Access (ns) 70 90 120 150 200 250
OE# (G#) Access (ns) 40 50 50 65 75 100

3
4
5

2

1

9
10
11
12
13

27
26
25
24
23

7
8

22
21

6

32
31

20

14

30
29
28

15
16

19
18
17

A6
A5
A4
A3
A2
A1
A0

A16

DQ0

A15
A12

A7

DQ1
DQ2

V

SS

A8
A9
A11
OE# (G#)
A10
CE# (E#)
DQ7

V

CC

PGM# (P#)

DQ6

A17
A14
A13

DQ5
DQ4
DQ3

V

PP

15652D-2

DQ6

V

PP

DQ5

DQ4

DQ3

13130234
5
6

7

8
9
10

11
12
13

17

18

19 2016

15

14

29
28
27

26
25
24
23
22
21

32
A7
A6
A5

A4
A3
A2
A1
A0

DQ0

A14
A13

A8

A9
A11
OE# (G#)

A10
CE# (E#)
DQ7

A12

A15

A16

V

CC

PGM# (P#)

A17

DQ1

DQ2

V

SS

15652D-3

18

8

DQ0–DQ7

A0–A17

CE# (E#)

OE# (G#)

15652D-4

Am27X020 3

ORDERING INFORMATION
Standard Pr od ucts

AMD standard products are available in several packages and operating ranges. The order number (Valid Combination) is formed
by a combination of the following:

Valid Combinations

Valid Combinations list configurations planned to be sup­ported in volume for this device. Consult the local AMD sales
office to confirm availability of specific valid combinations and
to check on newly released combinations.

DEVICE NUMBER/DESCRIPTION

Am27X020
2 Megabit (256 K x 8-Bit) CMOS ExpressROM Device

AM27X020

-75 J C

CODE DESIGNATION

Assigned by AMD

TEMPERATURE RANGE

C = Commercial (0°C to +70

°C)

I=Industrial (–40

°C to +85°C)

PACKAGE TYPE

P = 32-Pin Plastic Dual In-Line Package (PD 032)
J = 32-Pin Plastic Leaded Chip Carrier (PL 032)

SPEED OPTION

See Product Selector Guide and Valid Combinations

XXXXX

Valid Combinations

AM27X020-75

PC, JC, PI, JI

AM27X020-90
AM27X020-120
AM27X020-150
AM27X020-200
AM27X020-255

V

CC

= 5.0 V ± 5%

4 Am27X020

FUNCTIONAL DESCRIPTION
Read Mode

T o obtain dat a at the device outputs, Chip Enable ( CE#)
and Output Enable (OE#) must be driv en low . CE# con­trols the power to the de vice and is typically used t o se­lect the device . OE# en ables th e de v ice to out put dat a,
independent of device selection. Addresses must be
stable for at least t

ACC–tOE.

Refer to the Switching

Waveforms section for the timing diagram.

Standby Mode

The device enters the CMOS standby mode when CE#
is at V

CC

± 0.3 V. Maximum V

CC

current is reduced to
100 µA. The device enters the TTL-standby mode
when CE# is at V

IH

. Maximum V

CC

current is reduced
to 1.0 mA. When in either standby mode, the device
places its outputs in a high-impedance state, indepen­dent of the OE# input.

Output OR-Tieing

To accommodate multiple memory connections, a
two-line control function provides:

■ Low memory power dissipation, and

■ Assurance that output bus contention will not occur.

CE# should be decoded and used as the primary de­vice-selecting function, while OE# be made a common
connection to all devices in the array and connected to
the READ line from the system control bus. This as­sures that all deselected memory devices are in their
low-power standby mode and that the output pins are
only active when data is desired from a particular mem­ory device.

System Applications

During the switch between active and standby condi­tions, transient current peaks are produced on the ris­ing and falling edges of Chip Enab le . The magnitude of
these transient current peaks is dependent on the out­put capacitance loading of the de vi ce. At a minim um, a

0.1 µF ceramic capacitor (high frequency, low inherent
inductance) sho uld be used on each device between
V

CC

and VSS to minimize transient effects. In addition,
to overcome the voltage drop caused by the inductive
effects of the printed circuit board traces on Express­ROM device arrays, a 4.7 µF bulk electrolytic capacitor
should be used between V

CC

and VSS for each eight
devices. The location of the capacitor should be close
to where the power supply is connected to the array.

MODE SELECT TABLE

Note:

X = Either V

IH

or VIL.

Mode CE# OE# PGM# V

PP

Outputs

Read V

IL

V

IL

XXD

OUT

Output Disable X V

IH

X X High Z

Standby (TTL) V

IH

X X X High Z

Standby (CMOS) V

CC

± 0.3 V X X X High Z

Am27X020 5

ABSOLUTE MAXIMUM RATINGS

Storage Temperature

OTP Products. . . . . . . . . . . . . . . . . . –65°C to +125°C

Ambient Temperature

with Power Applied. . . . . . . . . . . . . . –55°C to +125°C

Voltage with Respect to V

SS

All pins except VCC . . . . . . . . . –0.6 V to VCC + 0.6 V

V

CC

(Note 1). . . . . . . . . . . . . . . . . . . . .–0.6 V to 7.0 V

Note:

1. Minimum DC voltage on inpu t or I/O pins – 0.5 V. D uring
voltage transitions, the input may overshoot V

SS

to –2.0 V
for periods of up to 20 ns. Max imum DC voltage o n inp ut
and I/O pins is V

CC

+ 5 V . During voltage transitions, input

and I/O pins may overshoot to V

CC

+ 2.0 V for periods up

to 20 ns.

Stresses above those listed under “Abso lute Maximum Rat­ings” may cause per mane nt dam age to the device. This is a
stress rating only; fun ctio nal ope ration of t he d evice at these
or any other condition s above those indicated in the opera­tional sections of this specification is not implied. Exposure of
the device to absolute maximum ratings for extended periods
may affect device reliability.

OPERATING RANGES

Commercial (C) Devices

Ambient Temperature (T

A

) . . . . . . . . . . .0°C to +70°C

Industrial (I) Devices

Ambient Temperature (T

A

) . . . . . . . . .–40°C to +85°C

Supply Read Voltages

V

CC

for ± 5% devices . . . . . . . . . . +4.75 V to +5.25 V

V

CC

for ± 10% devices . . . . . . . . . +4.50 V to +5.50 V

Operating ranges define those limits between which the func­tionality of the device is guaranteed.

6 Am27X020

DC CHARACTERISTICS over operating range (unless otherwise specified)

Caution: The device must not be removed from (or inserted into) a socket when VCC or VPP is applied.
Notes:

1. V

CC

must be applied simultaneously or before VPP, and removed simultaneously or after VPP..

2. I

CC1

is tested with OE# = V

IH

to simulate open outputs.

3. Minimum DC Input Voltage is –0.5 V. During transitions, the inputs may overshoot to –2.0 V for periods less than 20 ns.

Maximum DC Voltage on output pins is V

CC

+ 0.5 V, which may overshoot to VCC + 2.0 V for periods less than 20 ns.

Figure 1. Typical Supply Current vs. Frequency

V

CC

= 5.5 V, T = 25°C

Figure 2. Typical Supply Current vs. Temperature

V

CC

= 5.5 V, f = 10 MHz

Parameter

Symbol Parameter Description Test Conditions Min Max Unit

V

OH

Output HIGH Voltage IOH = –400 µA 2.4 V

V

OL

Output LOW Voltage IOL = 2.1 mA 0.45 V

V

IH

Input HIGH Voltage 2.0 VCC + 0.5 V

V

IL

Input LOW Voltage –0.5 +0.8 V

I

LI

Input Load Current VIN = 0 V to V

CC

1.0 µA

I

LO

Output Leakage Current V

OUT

= 0 V to V

CC

5.0 µA

I

CC1

VCC Active Current (Note 2) CE# = VIL, f = 10 MHz,

I

OUT

= 0 mA

30 mA

I

CC2

VCC TTL Standby Current CE# = V

IH

1.0 mA

I

CC3

VCC CMOS Standby Current CE# = VCC ± 0.3 V 100 µA

15652D-5

12345678910

30

25

20

15

10

Frequency in MHz

Supply Current

in mA

15652D-6

–75 –50 –55 0 25 50 75 100 125 150

30

25

20

15

10

Temperature in °C

Supply Current

in mA

Am27X020 7

TEST CONDITIONS

Table 1. Test Specifications

SWITCHING TEST WAVEFORM

KEY TO SWITCHING WAVEFORMS

2.7 kΩ

C

L

6.2 kΩ

5.0 V

Device

Under

Test

15652D-7

Figure 3. Test Setup

Note:

Diodes are IN3064 or equivalents.

Test Condition All Unit

Output Load 1 TTL gate
Output Load Capacitance, C

L

(including jig capacitance)

100 pF

Input Rise and Fall Times ≤ 20 ns
Input Pulse Levels 0.45–2.4 V

Input timing measurement reference
levels

0.8, 2.0 V

Output timing measurement
reference levels

0.8, 2.0 V

2.4 V

0.45 V
Input

Output

Test Points

2.0 V

2.0 V

0.8 V

0.8 V

15652D-8

Note: For CL = 100 pF.

KS000010-PAL

WAVEFORM INPUTS OUTPUTS

Steady

Changing from H to L

Changing from L to H

Don’t Care, Any Change Permitted Changing, State Unknown

Does Not Apply Center Line is High Impedance State (High Z)

8 Am27X020

AC CHARACTERISTICS

Caution: Do not remove the device from (or insert it into) a socket or board that has VPP or V

CC

applied.

Notes:

1. VCC must be applied simultaneously or before VPP, and removed simultaneously or after VPP.

2. This parameter is sampled and not 100% tested.

3. Switching characteristics are over operating range, unless otherwise specified.

4. See Figure 3 and Table 1 for test specifications.

SWITCHING WAVEFORMS

Notes:

1. OE# may be delayed up to t

ACC

– tOE after the falling edge of the addresses without impact on t

ACC

.

2. t

DF

is specified from OE# or CE#, whichever occurs first.

PACKAGE CAPACITANCE

Notes:

1. This parameter is only sampled and not 100% tested.

2. T

A

= +25°C, f = 1 MHz.

Parameter Symbols

Description Test Setup

Am27X020

UnitJEDEC Standard -75 -90 -120 -150 -200 -255

t

AVQV

t

ACC

Address to Output Delay

CE#,
OE# = V

IL

Max 70 90 120 150 200 250 ns

t

ELQV

t

CE

Chip Enable to Output Delay OE# = VILMax 70 90 120 150 200 250 ns

t

GLQV

t

OE

Output Enable to Output
Delay

CE# = V

IL

Max 40 50 50 65 75 100 ns

t

EHQZ

t

GHQZ

t

DF

(Note 2)

Chip Enable High or Output
Enable High to Output High Z,
Whichever Occurs First

Max253030304060ns

t

AXQX

t

OH

Output Hold Time from
Addresses, CE# or OE#,
Whichever Occurs First

Min000000ns

Addresses

CE#

OE#

Output

15652D-9

Addresses Valid

High Z

High Z

t

CE

Valid Output

2.4

0.45

2.0

0.8

2.0

0.8

t

ACC

(Note 1)

t

OE

tDF (Note 2)

t

OH

Parameter

Symbol Parameter Description Test Conditions

PD 032 PL 032

UnitTyp Max Typ Max

C

IN

Input Capacitance VIN = 0 10 12 8 10 pF

C

OUT

Output Capacitance V

OUT

= 0 12 15 9 12 pF

Am27X020 9

PHYSICAL DIMENSIONS

PD 032—32-Pin Plastic Dual In-Line Package (measured in inches)

PL 032—32-Pin Plastic Leaded Chip Carrier (measured in inches)

Pin 1 I.D.

1.640

1.680

.530
.580

.005 MIN

.045
.065

.090
.110

.140
.225

.120
.160

.014
.022

SEATING PLANE

.015
.060

16-038-SB_AG
PD 032
DG75
2-28-95 ae

32

17

16

.630
.700

0˚

10˚

.600
.625

.008
.015

.050 REF.

.026
.032

TOP VIEW

Pin 1 I.D.

.485
.495

.447
.453

.585
.595

.547
.553

16-038FPO-5
PL 032
DA79
6-28-94 ae

SIDE VIEW

SEATING

PLANE

.125
.140

.009
.015

.080
.095

.042
.056

.013
.021

.400

REF.

.490
.530

10 Am27X020

REVISION SUMMARY FOR AM27X020
Revision D

Global

Changed formatting to match current data sheets.

Absolute Maximum Ratings

Storage Temperature

: Removed “All Other Products ...

–65°C to +150°C”.

Trademarks

Copyright © 1998 Advanced Micro D evices, Inc. All rights reserved.
AMD, the AMD logo, and combinations thereof are trademarks of Advanced Micro Devices, Inc.
Flashrite is a trademark of Advanced Micro Devices, Inc.
Product names used in this publication are for identification purposes only and may be trademarks of their respective companies.