27C512A [MICROCHIP]

512K (64K x 8) CMOS EPROM; 512K （ 64K ×8 ） CMOS EPROM


型号：	27C512A
厂家：	MICROCHIP
描述：	512K (64K x 8) CMOS EPROM 512K （ 64K ×8 ） CMOS EPROM 可编程只读存储器电动程控只读存储器
文件：	总12页 (文件大小：73K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

27C512A

512K (64K x 8) CMOS EPROM

FEATURES

PACKAGE TYPES

TSOP

• High speed performance

OE/VPP

A11

28 A10

27 CE

26 D7

25 D6

24 D5

23 D4

22 D3

• CMOS Technology for low power consumption

- 25 mA Active current

A13

A14

VCC

- 30 µA Standby current

• Factory programming available

• Auto-insertion-compatible plastic packages

• Auto ID aids automated programming

• High speed express programming algorithm

• Organized 64K x 8: JEDEC standard pinouts

- 28-pin Dual-in-line package

- 32-pin PLCC Package

27C512A

A15

A12

21 VSS

20 D2

19 D1

18 D0

17 A0

16 A1

15 A2

A7 10

A6 11

A5 12

A4 13

A3 14

PLCC

- 28-pin SOIC package

A11

OE/V^PP

A10

- 28-pin TSOP package

- 28-pin VSOP package

- Tape and reel

• Data Retention > 200 years

• Available for the following temperature ranges

- Commercial:

- Industrial:

0˚C to +70˚C

DIP/SOIC

-40˚C to +85˚C

-40˚C to +125˚C

- Automotive:

A15

VCC

A14

A13

A12

V^SS

DESCRIPTION

The Microchip Technology Inc. 27C512A is a CMOS

512K bit electrically Programmable Read Only Memory

(EPROM). The device is organized into 64K words by

8 bits (64K bytes). Accessing individual bytes from an

address transition or from power-up (chip enable pin

going low) is accomplished in less than 90 ns. This

very high speed device allows the most sophisticated

microprocessors to run at full speed without the need

for WAIT states. CMOS design and processing enables

this part to be used in systems where reduced power

consumption and high reliability are requirements.

A11

OE/V^PP

A10

VSOP

A complete family of packages is offered to provide the

most ﬂexibility in applications. For surface mount appli-

cations, PLCC, VSOP, TSOP or SOIC packaging is

available. Tape or reel packaging is also available for

PLCC or SOIC packages.

OE/V^PP

A11

A13

A14

A10

V^SS

V^CC

A15

27C512A

A12

1996 Microchip Technology Inc.

DS11173E-page 1

This document was created with FrameMaker 4 0 4

27C512A

TABLE 1-1:

Name

PIN FUNCTION TABLE

Function

1.0

ELECTRICAL CHARACTERISTICS

1.1

Maximum Ratings*

VCC and input voltages w.r.t. VSS........-0.6V to +7.25V

A0-A15

Address Inputs

VPP voltage w.r.t. VSS during

programming .........................................-0.6V to +14V

Chip Enable

OE/VPP

O0 - O7

VCC

Output Enable/Programming Voltage

Data Output

Voltage on A9 w.r.t. VSS ......................-0.6V to +13.5V

Output voltage w.r.t. VSS ............... -0.6V to VCC +1.0V

Storage temperature .......................... -65˚C to +150˚C

Ambient temp. with power applied ..... -65˚C to +125˚C

+5V Power Supply

Ground

VSS

*Notice: Stresses above those listed under “Maximum Ratings”

may cause permanent damage to the device. This is a stress rat-

ing only and functional operation of the device at those or any

other conditions above those indicated in the operation listings of

this speciﬁcation is not implied. Exposure to maximum rating con-

ditions for extended periods may affect device reliability.

No Connection; No Internal Connec-

tion

Not Used; No External Connection is

Allowed

TABLE 1-2:

READ OPERATION DC CHARACTERISTICS

VCC = +5V ±10%

Commercial:

Industrial:

Tamb = 0˚C to +70˚C

Tamb = -40˚C to +85˚C

Extended (Automotive):

Tamb = -40˚C to +125˚C

Parameter

Part*

Status

Symbol

Min

Max

Units Conditions

Input Voltages

all

Logic "1"

Logic "0"

VIH

VIL

2.0

-0.5

VCC+1

0.8

Input Leakage

all

ILI

-10

2.4

µA VIN = 0 to VCC

Output Voltages

Logic "1"

Logic "0"

VOH

VOL

IOH = - 400 µA

IOL = 2.1 mA

0.45

Output Leakage

all

—

ILO

-10

—

µA VOUT = 0V to VCC

Input Capacitance

CIN

pF VIN = 0V; Tamb = 25°C;

f = 1 MHz

Output Capacitance

all

—

COUT

—

pF VOUT = 0V; Tamb = 25°C;

f = 1 MHz

Power Supply Current,

Active

I, E

TTL input

ICC

—

mA VCC = 5.5V

mA f = 1 MHz;

OE/VPP = CE = VIL;

IOUT = 0 mA;

VIL = -0.1 to 0.8V;

VIH = 2.0 to VCC;

Note 1

Power Supply Current,

Standby

I, E

all

TTL input

CMOS input ICC(S)CMOS

ICC(S)TLL

—

µA CE = Vcc±0.2V

* Parts: C=Commercial Temperature Range; I, E=Industrial and Extended Temperature Ranges

Note 1: Typical active current increases .75 mA per MHz up to operating frequency for all temperature ranges.

DS11173E-page 2

1996 Microchip Technology Inc.

27C512A

TABLE 1-3:

READ OPERATION AC CHARACTERISTICS

AC Testing Waveform:

Output Load:

VIH = 2.4V and VIL = .45V; VOH = 2.0V and VOL = 0.8V

1 TTL Load + 100 pF

Input Rise and Fall Times: 10 ns

Ambient Temperature:

Commercial:

Tamb = 0˚C to +70˚C

Industrial:

Extended (Automotive):

Tamb = -40˚C to +85˚C

Tamb = -40˚C to +125˚C

27C512-90*

Sym

27C512-10*

27C512-12

27C512-15

Parameter

Units Conditions

Min

Max

Min

Max

Min

Max

Min

Max

Address to Output

Delay

tACC

tCE

—

100

—

120

—

150

CE = OE/

VPP = VIL

CE to Output Delay

—

100

—

120

—

150

OE/VPP =

VIL

OE to Output Delay

tOE

—

CE = VIL

OE to Output High

Impedance

tOFF

Output Hold from

Address, CE or OE/

VPP, whichever

occurred ﬁrst

tOH

—

*90/10 AC Testing Waveforms: VIH = 3.0V and VIL = 0V; VOH = 1.5V and VOL = 1.5V

Output Load: 1 TTL Load + 30 pF

FIGURE 1-1: READ WAVEFORMS

VIH

Address Valid

Address

VIL

VIH

VIL

tCE(2)

VIH

VIL

tOFF(1,3)

tOH

tOE(2)

VOH

VOL

Outputs

O0 - O7

High Z

Valid Output

tACC

Notes: (1) tOFF is specified for OE or CE, whichever occurs first

(2) OE may be delayed up to tCE - tOE after the falling edge of CE without impact on tCE

(3) This parameter is sampled and is not 100% tested.

1996 Microchip Technology Inc.

DS11173E-page 3

27C512A

TABLE 1-4:

PROGRAMMING DC CHARACTERISTICS

Ambient Temperature: Tamb = 25°C ± 5°C

VCC = 6.5V ± 0.25V, OE/VPP = VH = 13.0V ± 0.25V

Parameter

Status

Symbol

Min.

Max.

Units

Conditions (See Note 1)

Input Voltages

Logic “1”

Logic “0”

VIH

VIL

2.0

-0.1

VCC+1

0.8

Input Leakage

—

ILI

-10

µA

VIN = 0V to VCC

Output Voltages

Logic “1”

Logic “0”

VOH

VOL

2.4

—

IOH = -400 µA

IOL = 2.1 mA

0.45

VCC Current, program & verify

OE/VPP Current, program

A9 Product Identiﬁcation

—

ICC2

IPP2

VID

—

CE = VIL

11.5

12.5

Note 1: VCC must be applied simultaneously or before VPP voltage on OE/VPP and removed simultaneously or after

the VPP voltage on OE/VPP.

TABLE 1-5:

PROGRAMMING AC CHARACTERISTICS

for Program, Program Verify

and Program Inhibit Modes

AC Testing Waveform: VIH=2.4V and VIL=0.45V; VOH=2.0V; VOL=0.8V

Ambient Temperature: 25°C ±5°C

VCC = 6.5V ± 0.25V, OE/VPP = VH = 13.0V ± 0.25 V

Parameter

Symbol

Min. Max. Units

Remarks

Address Set-Up Time

Data Set-Up Time

tAS

tDS

—

µs

Data Hold Time

tDH

—

Address Hold Time

Float Delay (2)

tAH

—

tDF

130

—

VCC Set-Up Time

tVCS

tPW

tCES

tOES

tOEH

tOR

Program Pulse Width (1)

CE Set-Up Time

105

—

100 µs typical

OE Set-Up Time

—

OE Hold Time

—

OE Recovery Time

OE /VPP Rise Time During Programming

—

tPRT

—

Note 1: For express algorithm, initial programming width tolerance is 100 µs ±5%.

2: This parameter is only sampled and not 100% teted. Output ﬂoat is deﬁned as the point where data is no

longer driven (see timing diagram).

DS11173E-page 4

1996 Microchip Technology Inc.

27C512A

FIGURE 1-2: PROGRAMMING WAVEFORMS (1)

Program

Verify

VIH

Address Stable

Address VIL

tAH

tAS

VIH

Data In Stable

Data Out Valid

Data VIL

tDF

(2)

tDH

tDS

6.5 V (3)

VCC 5.0V

VIH

tCE

(2)

tVCS

tOES

tPW

CE VIL

tCES

tOEH

tOR

13.0 V (3)

OE/VPP

tOPW

VIL

tPRT

Notes: (1) The input timing reference level is 0.8V for VIL and 2.0V for VIH.

(2) tDF and tOE are characteristics of the device but must be accommodated by the programmer.

(3) VCC = 6.5V ±0.25V, VPP = VH = 13.0V ±0.5V for express programming algorithm.

TABLE 1-6:

MODES

Operation Mode

OE/VPP

O0 - O7

Read

VIL

VIH

VIL

DOUT

DIN

Program

Program Verify

Program Inhibit

Standby

DOUT

High Z

Output Disable

Identity

VIH

VIL

High Z

Identity Code

X = Don’t Care

For Read operations, if the addresses are stable, the

address access time (tACC) is equal to the delay from

CE to output (tCE). Data is transferred to the output

after a delay (tOE) from the falling edge of OE/VPP.

1.2

Read Mode

(See Timing Diagrams and AC Characteristics)

Read Mode is accessed when

a) the CE pin is low to power up (enable) the chip

b) the OE/VPP pin is low to gate the data to the

output pins

1996 Microchip Technology Inc.

DS11173E-page 5

27C512A

Since the erased state is “1” in the array, programming

of “0” is required. The address to be programmed is set

via pinsA0 -A15 and the data to be programmed is pre-

sented to pins O0 - O7. When data and address are

stable, a low going pulse on the CE line programs that

location.

1.3

Standby Mode

The standby mode is entered when the CE pin is high,

and the program mode is not identiﬁed.

When this conditions are met, the supply current will

drop from 25 mA to 30 µA.

1.7

Verify

1.4

Output Enable OE/VPP

After the array has been programmed it must be veriﬁed

to ensure all the bits have been correctly programmed.

This mode is entered when all the following conditions

are met:

This multifunction pin eliminates bus connection in mul-

tiple bus microprocessor systems and the outputs go to

high impedance when:

• the OE/VPP pin is high (VIH).

a) VCC is at the proper level,

b) the OE/VPP pin is low, and

c) the CE line is low.

When a VH input is applied to this pin, it supplies the

programming voltage (VPP) to the device.

1.5

Erase Mode (UV Windowed Versions)

1.8

Inhibit

Windowed products offer the ability to erase the mem-

ory array. The memory matrix is erased to the all “1's”

state as a result of being exposed to ultraviolet light. To

ensure complete erasure, a dose of 15 watt-second/

When programming multiple devices in parallel with dif-

ferent data, only CE needs to be under separate control

to each device. By pulsing the CE line low on a partic-

ular device, that device will be programmed; all other

devices with CE held high will not be programmed with

the data (although address and data will be available on

their input pins).

cm is required. This means that the device window

must be placed within one inch and directly underneath

an ultraviolet lamp with a wavelength of 2537 Ang-

stroms, intensity of 12,000 mW/cm for approximately

40 minutes.

1.9

Identity Mode

1.6

Programming Mode

In this mode speciﬁc data is output which identiﬁes the

manufacturer as Microchip Technology Inc. and the

device type. This mode is entered when PinA9 is taken

to VH (11.5V to 12.5V). The CE and OE/VPP lines must

be at VIL. A0 is used to access any of the two non-eras-

able bytes whose data appears on O0 through O7.

The Express algorithm must be used for best results. It

has been developed to improve programming yields

and throughput times in a production environment. Up

to 10 100-microsecond pulses are applied until the byte

is veriﬁed. A ﬂowchart of the Express algorithm is

shown in Figure 1-3.

Programming takes place when:

Identity

Input

Output

a) VCC is brought to the proper voltage,

b) OE/VPP is brought to the proper VH level, and

c) CE line is low.

0 O O O O O O O

Manufacturer

Device Type*

VIL

VIH

* Code subject to change

DS11173E-page 6

1996 Microchip Technology Inc.

27C512A

FIGURE 1-3: PROGRAMMING EXPRESS ALGORITHM

Conditions:

Start

Tamb = 25˚C ±5˚C

VCC = 6.5 ±0.25V

VPP = 13.0 ±0.25V

ADDR = First Location

VCC = 6.5V

VPP = 13.0V

X = 0

Program one 100 µs pulse

Increment X

Verify

Byte

Pass

Fail

Yes

Device

Failed

X = 10 ?

Last

Address?

Yes

Increment Address

VCC = VPP = 4.5V, 5.5V

All

Yes

bytes

= original

data?

Device

Passed

Device

Failed

1996 Microchip Technology Inc.

DS11173E-page 7

27C512A

NOTES:

DS11173E-page 8

1996 Microchip Technology Inc.

27C512A

NOTES:

1996 Microchip Technology Inc.

DS11173E-page 9

27C512A

NOTES:

DS11173E-page 10

1996 Microchip Technology Inc.

27C512A

27C512A Product Identiﬁcation System

To order or to obtain information (e.g., on pricing or delivery),, please use listed part numbers, and refer to factory or listed sales ofﬁces.

27C512A – 70

Package:

L = Plastic Leaded Chip Carrier

P = Plastic DIP (600 Mil)

SO = Plastic SOIC (300 Mil)

TS = Thin Small Outline Package(TSOP) 8x20mm

VS = Very Small Outline Package(VSOP) 8x13.4mm

Temperature

Range:

Blank = 0˚C to +70˚C

I = -40˚C to +85˚C

E = -40˚C to +125˚C

Access

Time:

90 = 90 ns

10 = 100 ns

12 = 120 ns

15 = 150 ns

Device:

27C512A

512K (64K x 8) CMOS EPROM

1996 Microchip Technology Inc.

DS11173E-page 11

WORLDWIDE SALES & SERVICE

AMERICAS

Corporate Ofﬁce

ASIA/PACIFIC

China

EUROPE

United Kingdom

Microchip Technology Inc.

Microchip Technology

Arizona Microchip Technology Ltd.

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9/3/96

Los Angeles

Microchip Technology Inc.

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Microchip Technmgy Inc.

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Microchip Technology Inc.

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Tel: 905 405-6279 Fax: 905 405-6253

Printed on recycled paper.

Information contained in this publication regarding device applications and the like is intended through suggestion only and may be superseded by updates. No repre-

sentation or warranty is given and no liability is assumed by Microchip Technology Incorporated with respect to the accuracy or use of such information, or infringement

of patents or other intellectual property rights arising from such use or otherwise. Use of Microchip’s products as critical components in life support systems is not autho-

rized except with express written approval by Microchip. No licenses are conveyed, implicitly or otherwise, under any intellectual property rights. The Microchip logo and

DS11173E-page 12

1996 Microchip Technology Inc.

27C512A [MICROCHIP]

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