Rainbow Electronics AT27C516 User Manual

Features

•

Fast Read Access Time - 45 ns

•

Low Power CMOS Operation

– 100 µA max. Standby
– 30 mA max. Active at 5 MHz

•

JEDEC Standard Packages

– 44-Lead PLCC
– 40-Lead VSOP (10mm x 14mm)

•

5V ± 10% Power Supply

•

High Reliability CMOS Technology

– 2000V ESD Protection
– 200 mA Latchup Immunity

•

Rapid™ Programming Algorithm - 50 µs/word (typical)

•

CMOS and TTL Compatible Inputs and Outputs

•

Integrated Product Identification Code

•

Commercial and Industrial Temperature Ranges

512K (32K x 16)
OTP EPROM

Description

The AT27C516 is a low-power, high performance 524,288-bit one-time programmable
read only memory (OTP EPROM) organized 32K by 16 bits. It requires onl y one 5V
power supply in no rmal r ead mod e o per at ion . A ny word ca n b e ac c es sed i n l es s tha n
45 ns, eliminating the need for speed reducing WAIT states. The by-16 organization
make this part ideal for high-performance 16- and 32-bit microprocessor systems.

In read mode, the AT27C516 typically consumes 15 mA. Standby mode supply cur­rent is typically less than 10 µA.

(continued)

Pin Configurations

Pin Name Function

A0 - A14 Addresses
O0 - O15 Outputs
CE
OE
PGM Program Strobe
NC No Connect

Note: Both GND pins must be connected.

7

O12

8

O11

9

O10

10

O9

11

O8

12

GND

13

NC

14

O7

15

O6

16

O5

17

O4

Note: PLCC Package Pins 1 and 23 are
DON’T CONNECT.

Chip Enable
Output En able

PLCC Top View

O13

O14

O15CEVPPNCVCC

65432

1819202122232425262728

O3O2O1

O0

OE

1

NC

PGMNCNC

4443424140

A0A1A2A3A4

A14

39
38
37
36
35
34
33
32
31
30
29

A13
A12
A11
A10
A9
GND
NC
A8
A7
A6
A5

A10
A11
A12
A13
A14

NC
NC

PGM

VCC
VPP

CE
O15
O14
O13
O12
O11
O10

O9

O8

VSOP Top View

Type 1

1

A9

2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

40

GND

39

A8

38

A7

37

A6

36

A5

35

A4

34

A3

33

A2

32

A1

31

A0

30

OE

29

O0

28

O1

27

O2

26

O3

25

O4

24

O5

23

O6

22

O7

21

GND

AT27C516

Rev. 0362C–10/98

1

The AT27C516 is available in industry standard JEDEC­approved one-time progr am ma ble (OTP ) pl astic P LCC an d
VSOP packages. The dev ice f eatures tw o-li ne contro l (CE

) to eliminate bus contention in high-speed systems.

OE
With 32K word storage ca pability, the AT2 7C516 allows

firmware to be stored reliably and to be accessed by the
system without the delays of mass storage media.

Atmel’s 27C516 have ad ditional f eatures to ensure high
quality and efficient producti on use. The Rapi d™ Progra m­ming Algori thm reduc es the time require d to prog ram the
part and guarantees reliable programming. Programming
time is typically only 50 µs/word. The Integrated Product
Identification Code electronica lly identifi es the devic e and
manufacturer. This feature is used by industry standard
programming equi pmen t to se lect the prop er progr ammi ng
algorithms and voltages.

Block Diagram

System Considerations

Switching between active and standby conditions via the

,

Chip Enable pin may produ ce tra ns ien t vo ltag e ex cu rs i ons .
Unless accommodated by the system design, these tran­sients may exceed data sheet limits, resulting in device
non-conforman ce. At a mini mum, a 0.1 µF high frequency,
low inherent inductance, ceramic capacitor should be uti­lized for each device. This capacitor should be connected
between the V
close to the device as possible. Additionally, to stabilize the
supply voltage level on printed circuit boards with large
EPROM arrays, a 4.7 µF bulk electrolytic capacitor should
be utilized, again connected between the V
terminals. This capacitor should be positioned as close as
possible to the point where the power supply is connected
to the array.

and Ground terminals of the device, as

CC

and Ground

CC

2

AT27C516

Absolute Maximum Ratings*

Temperature Under Bias................................-55°C to +125°C

Storage Temperature..................................... -65°C to +150°C

Voltage on Any Pin with

Respect to Ground .........................................-2.0V to +7.0V

Voltage on A9 with

Respect to Ground ......................................-2.0V to +14.0V

AT27C516

*NOTICE: Stresses beyond those listed under “Absolute

Maximum Ratings” may cause permanent dam­age to the de vic e. T his is a stres s r ating o nly an d
functional opera tion of the device at these or an y

(1)

(1)

other conditions beyond those indicated in the
operational sections of this specification is not
implied. Exposure to absolute maximum rating
conditions for extended periods may affect
device reli abi li ty

VPP Supply Voltage with

Respect to Ground .......................................-2.0V to +14.0V

(1)

Note: 1. Minimum voltage is -0.6V dc which may undershoot to -2.0V for pulses of less than 20 ns. Maximum output pin voltage is

+ 0.75V dc which may overshoot to +7.0 volts for pulses of less than 20 ns.

V

CC

Operating Modes

Mode \ Pin CE OE PGM Ai V

Read V

IL

Output Disable X V
Standby V
Rapid Program

(2)

PGM Verify V
PGM Inhibit V

Product Identification

Notes: 1 . X can be V

(4)

or VIH.

IL

IH

V

IL

IL

IH

V

IL

V

IL

IH

XX X X

V

IH

V

IL

XX X VPPHigh Z

V

IL

(1)

X

Ai X D

XXXHigh Z

V

IL

V

IH

X

Ai V
Ai V

A9 = V

(3)

H

A0 = VIH or VIL

A1 - A14 = V

IL

2. Refer to Programming Character istics.

3. VH = 12.0 ± 0.5V.

4. Two identifier bytes may be selected. All Ai inputs are held low (V
) to select the Manufacturer’s Identification byte and high (VIH) to select the Device Code byte.

(V

IL

), except A9 which is set to VH and A0 which is toggle d low

IL

5. Standby VCC current (ISB) is specified with VPP = VCC. VCC > VPP will cause a slight increase in ISB.

V

PP

(5)

PP

PP

CC

Outputs

OUT

High Z
D

IN

D

OUT

Identification Code

3

DC and AC Operating Conditions for Read Operation

AT27C516

-45 -55 -70 -85 -10

Operating
Temperature (Case)

Power Supply 5V ± 10% 5V ± 10% 5V ± 10% 5V ± 10% 5V ± 10%

V

CC

Com. 0°C - 70°C 0°C - 70°C 0°C - 70°C 0°C - 70°C 0°C - 70°C
Ind. -40°C - 85°C -40°C - 85°C -40°C - 85°C -40°C - 85°C -40°C - 85°C

DC and Operating Characteristics for Read Operation

Symbol Parameter Condition Min Max Units

I

LI

I

LO

(2)

I

PP1

I

SB

I

CC

V

IL

V

IH

V

OL

V

OH

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

Input Load Current VIN = 0V to V
Output Leakage Current V

(1)

V

Read/Standby Current VPP = V

PP

(1)

V

Standby Current

CC

= 0V to V

OUT

CC

(CMOS), CE = V

I

SB1

I

(TTL), CE = 2.0 to VCC + 0.5V 1 mA

SB2

VCC Active Current f = 5 MHz, I

CC

CC

CC

= 0 mA, CE = V

OUT

0.3V 100 µA

±

IL

± 1 µA
± 5 µA

10 µA

30 mA
Input Low Voltage -0.6 0.8 V
Input High Vo ltage 2.0 VCC + 0.5 V
Output Low Voltage IOL = 2.1 mA 0.4 V
Output High Voltage I

may be connected directly to VCC, except during programming. The supply current would then be the sum of ICC and IPP.

2. V

PP

= -400 µA2.4V

OH

4

AT27C516