Rainbow Electronics AT27BV4096 User Manual

Features

•

Fast Read Access Time - 120 ns

•

Dual Voltage Range Operation

– Unregulated Battery Power Supply Range, 2.7V to 3.6V

or Standard 5V ± 10% Supply Range

•

Pin Compatible with JEDEC Standard AT27C4096

•

Low Power CMOS Operation

– 20 µA max. (less than 1 µA typical) Standby for VCC = 3.6V
– 36 mW max. Active at 5 MHz for VCC = 3.6V

•

JEDEC Standard Surface Mount Packages

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

•

High Reliability CMOS Technology

– 2,000V ESD Protection
– 200 mA Latchup Immunity

•

Rapid™ Programming algorithm - 100 µs/w o rd (typical)

•

CMOS and TTL Compatible Inputs and Outputs

– JEDEC Standard for LVTTL and LVBO

•

Integrated Product Identification Code

•

Commercial and Industrial Temperature Ranges

4-Megabit
(256K x 16)
Unregulated

Battery-Voltage

™

High-Speed OTP

Description

The AT27BV4096 is a high performance, low power, low voltage 4,194,304-bit one­time programmable read only memory (OTP EPROM) organized as 256K by 16 bits. It
requires only one supply in t he range of 2. 7V to 3. 6V in normal r ead mo de oper ation .
The by-16 organizat ion m akes this p art i deal for por table and handhe ld 16 and 32 bi t
microprocessor based systems using either regulated or unregulated battery power.

(continued)

Pin Configurations

Pin Name Function

A0 - A17 Addresses
O0 - O15 Outputs
CE
OE
NC No Connect

Note: Both GND pins must be connected.

O13
65432

7

O12

8

O11

9

O10

10

O9

11

O8

12

GND

13

NC

14

O7

15

O6

16

O5

17

O4

1819202122232425262728

O3O2O1

Note: PLCC package pins 1 and 23 are
DON’T CONNECT.

Chip Enable
Output En able

PLCC Top View

O14

O15CEVPPNCVCC

O0

OE

1

NC

A17

4443424140

A0A1A2A3A4

A16

A15

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
A15
A16

A17
VCC
VPP

CE
O15
O14
O13
O12
O11
O10

O9

O8

TSOP 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

EPROM

AT27BV4096

Rev. 0640B–10/98

1

Atmel’s innovative desi gn techniques provide fast sp eeds
that rival 5V parts while keepi ng the lo w power con sump­tion of a 3V supply. At V

= 2.7V, any word can be

CC

accessed in less than 120 ns. With a typical power dissipa­tion of only 18 mW at 5 MHz and V

= 3V, the

CC

AT27BV4096 consumes less than one fifth the power of a
standard 5V EPROM.

Standby mode supply current is typically less than 1 µA at
3V. The AT27BV4096 simplifies system design and
stretches battery lif etime even further by el iminating the
need for power supply regulation.

The AT27BV4096 is availa ble in in dus try stan dard J EDE C­approved one-time progr am ma ble (OTP ) pl astic P LCC an d
TSOP packages. Al l devic es featur e two-lin e contro l (CE

) to give designers the flexibility to prevent bus

OE
contention.

The AT27BV4096 operating with V

at 3.0V produces TTL

CC

level outputs that are compatible with standard TTL logic
devices operati ng at V

= 5.0V. At VCC = 2.7V, the part is

CC

compatible with JEDEC approved low voltage battery oper­ation (LVBO) interface specifications. T he device is als o
capable of standard 5-volt operation making it ideally suited
for dual sup ply rang e system s or car d produc ts that are
pluggable in both 3-volt and 5-volt hosts.

Atmel’s AT27BV4096 has additional features to ensure
high quality and eff icie nt produc tion use. Th e Rapid™ Pro-

gramming Algorithm reduces the time required to program
the part and guarantees reliable programming. Program­ming time is typically only 100 µs/word. The Integrated
Product Identific ation Code electr onically identifi es the
device and manufacturer. This feature is used by i ndustry
standard programming equipment to sele ct the prope r pro­gramming algori thms an d voltag es. The AT 27BV4 096 pro­grams exactly the same way as a sta ndard 5V AT27 C409 6
and uses the same programming equipment.

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

Block Diagram

2

AT27BV4096

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

AT27BV4096

*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 be exceeded if certain precautions are observed (consult application notes) and which may

V

CC

overshoot to +7.0V for pulses of less than 20 ns.

Operating Modes

Mode \ Pin CE OE Ai V

(2)

Read
Output Disable
Standby
Rapid Program
PGM Verify
PGM Inhibit

(2)

(2)

(3)

(3)

(3)

Product Identification

Notes: 1 . X can be V

(3)(5)

or VIH.

IL

V

IL

XV

V

IH

V

IL

V

IH

V

IH

V

IL

V

IL

IH

XX X

V

IH

V

IL

V

IH

V

IL

Ai X

XXV

Ai V
Ai V

XVPPV

A9 = V

(4)

H

A0 = VIH or VIL

A1 - A17 = V

IL

2. Read, output disable, and standby modes require, 2.7 V ≤ VCC ≤ 3.6V, or 4.5V ≤ VCC ≤ 5.5V.

3. Refer to Programming C haracteristics. Programming modes require V

4. VH = 12.0 ± 0.5V.

5. Two identifier bytes may be selected. All Ai inputs are held low (VIL), except A9 which is set to VH and A0 which is toggle d low
(V

) to select the Manufacturer’s Identification byte and high (VIH) to select the Device Code byte.

IL

V

= 6.5V.

CC

PP

(1)

(5)

PP

PP

CC

V

CC

(2)

V

CC

(2)

CC

(2)

V

CC

(3)

V

CC

(3)

V

CC

(3)

CC

(3)

V

CC

Outputs

D

OUT

High Z
High Z
D

IN

D

OUT

High Z

Identification Code

3

DC and AC Operating Conditions for Read Operation

AT27BV4096-12 AT27BV4096-15

Operating Temperature
(Case)

Com. 0°C - 70°C0°C - 70°C
Ind. -40°C - 85°C-40°C - 85°C

VCC Power Supply

2.7V to 3.6V 2.7V to 3.6V
5V ± 10% 5V ± 10%

DC and Operating Characteristics for Read Operation

Symbol Parameter Condition Min Max Units
V

= 2.7V to 3.6V

CC

I

LI

I

LO

(2)

I

PP1

I

SB

I

CC

V

IL

V

IH

V

OL

V

OH

= 4.5V to 5.5V

V

CC

I

LI

I

LO

(2)

I

PP1

I

SB

I

CC

V

IL

V

IH

V

OL

V

OH

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

(1)

V

Read/Standby Current VPP = V

PP

(1)

V

Standby Current

CC

OUT

(CMOS), CE = V

I

SB1

I

(TTL), CE = 2.0 to VCC + 0.5V 100

SB2

VCC Active Current f = 5 MHz, I

= 3.0 to 3.6V -0.6 0.8 V

V

Input Low Voltage

Input High Voltage

Output Low Voltage

Output High Voltage

CC

V

= 2.7 to 3.6V -0.6 0.2 x V

CC

VCC = 3.0 to 3.6V 2.0 VCC + 0.5 V
V

= 2.7 to 3.6V 0.7 x V

CC

= 2.0 mA 0.4 V

I

OL

I

= 100 µA0.2V

OL

I

= 20 µA0.1V

OL

= -2.0 mA 2.4 V

I

OH

I

= -100 µAV

OH

I

= -20 µAV

OH

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

(1)

V

Read/Standby Current VPP = V

PP

(1)

V

Standby Current

CC

OUT

I

(CMOS), CE = VCC ± 0.3V 100

SB1

I

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

SB2

VCC Active Current f = 5 MHz, I

= 0V to V

CC

OUT

= 0V to V

CC

OUT

CC

CC

0.3V 20

CC

±

= 0 mA, CE = VIL, VCC = 3.6V 10 mA

CC

- 0.2 V

CC

- 0.1 V

CC

CC

CC

= 0 mA, CE = V

IL

Input Low Voltage -0.6 0.8 V
Input High Voltage 2.0 VCC + 0.5 V
Output Low Voltage IOL = 2.1 mA 0.4 V
Output High Voltage IOH = -400 µA2.4V

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

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

±

1

±

5

10

CC

VCC + 0.5 V

±

1

±

5

10

40 mA

µ

A

µ

A

µ

A

µ

A

µ

A

V

µ

A

µ

A

µ

A

µ

A

4

AT27BV4096