Page 1
Features
•
Fast Read Access Time - 70 ns
•
Low Power CMOS Operation
–100 µA max. Standby
– 30 mA max. Active at 5 MHz
•
JEDEC Standard Packages
– 32-Lead 600-mil PDIP
– 32-Lead 450-mil SOIC (SOP)
– 32-Lead PLCC
– 32-Lead TSOP
•
5V ± 10% Supply
•
High Reliability CMOS Technology
– 2000V ESD Protection
– 200 mA Latchup Immunity
•
Rapid™ Programming Algorithm - 100 µs/byte (typical)
•
CMOS and TTL Compatible Inputs and Outputs
•
Integrated Product Identification Code
•
Commercial and Industrial Temperature Ranges
4-Megabit
(512K x 8)
OTP EPROM
Description
The AT27C040 chip is a lo w-power, high-p erformance, 4,194,304-b it one-time pro grammable read only memory (OTP EPRO M) organized as 512K by 8 bits . The
AT27C040 requires onl y one 5V power suppl y in normal read mode op eration. Any
byte can be accessed in less than 70 ns, eliminating the need for speed reducing
WAIT states on high-performance microprocessor systems.
Pin Configurations
Pin Name Function
A0 - A18 Addresses
O0 - O7 Outputs
CE
OE
PDIP, SOIC Top View
VPP
A16
A15
A12
A7
A6
A5
A4
A3
A2
A1
A0
O0
O1
O2
GND
Chip Enable
Output Enable
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
A11
A9
A8
A13
A14
A17
A18
VCC
VPP
A16
A15
A12
A7
A6
A5
A4
VCC
A18
A17
A14
A13
A8
A9
A11
OE
A10
CE
07
06
05
04
03
TSOP Top View
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
PLCC Top View
A12
432
5
A7
6
A6
7
A5
8
A4
9
A3
10
A2
11
A1
12
A0
13
O0
14151617181920
01
A15
02
A16
GND
VPP
VCC
1
323130
030405
A18
A17
29
28
27
26
25
24
23
22
21
06
A14
A13
A8
A9
A11
OE
A10
CE
07
(continued)
OE
32
A10
31
CE
30
07
29
06
28
05
27
04
26
03
25
GND
24
02
23
01
22
O0
21
A0
20
A1
19
A2
18
A3
17
AT27C040
Rev. 0189E–07/97
1
Page 2
Atmel’s scaled CMOS tec hnology provides low acti ve
power cons umption, and fast pr ogrammi ng. Power consumption is typically 8 mA in active mode and less than
10 µA in standby mode.
The AT27C040 is available in a choice of industry standard
JEDEC-approved one-tim e programmable (OTP) plastic
PDIP, PLCC, SOIC (SOP), and TSO P packages. The
device features two-line control (CE
contention in high-speed systems.
Atmel’s AT27C040 has addition al features to ensure hig h
quality and efficient production use. The Rapid
ming Algori thm reduc es the time require d to prog ram the
part and guarantees reliable programming. Programming
time is typically only 100 µs/byte. 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.
, OE) to eliminate bus
™
Program-
Block Diagram
Switching 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
AT27C040
Page 3
Operating Modes
AT27C040
Mode/Pin CE OE Ai V
Read V
IL
Output Disable X V
Standby V
Rapid Program
(2)
IH
V
IL
PGM Verify X V
PGM Inhibit V
Product Identification
(4)
IH
V
IL
V
IL
IH
Ai X
XXHigh Z
X X X High Z
V
IH
IL
V
IH
V
IL
Ai V
Ai V
XVPPHigh Z
A9 = V
(3)
H
A0 = VIH or VIL
A1 - A18 = V
IL
Notes: 1. X can be VIL or VIH.
2. Refer to Programming Characteristics
3. VH = 12.0 ± 0.5V.
4. Two identifier bytes ma y be se lected. All Ai inputs are held lo w (V
) to select the Manufacturer’s Identificaton byte and high (VIH) to select the Device Code byte.
(V
IL
), except A9 which is set to VH and A0 which is toggled low
IL
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
*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 any
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 re li abi li ty.
PP
(1)
PP
PP
Outputs
D
OUT
D
IN
D
OUT
X Identification Code
V
Supply Voltage with
PP
Respect to Ground ..........................................-2.0V to +14.0V
3
Page 4
DC and AC Operating Conditions for Read Operation
AT27C040-70 AT27C040-90 AT27C040-12 AT27C040-15
Operating
Temperature (Case)
V
Power Supply 5V ± 10% 5V ± 10% 5V ± 10% 5V ± 10%
CC
Com. 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
DC and Operating Characteristics for Read Operation
Symbol Paramter Condition Min Max Units
I
I
I
I
I
V
V
V
V
LI
LO
PP1
SB
CC
IL
IH
OL
OH
(2)
Input Load Current VIN = 0V to V
Output Leakage Current V
(1)
V
Read/Standby Current VPP = V
PP
(1)
V
Standby Current
CC1
= 0V to V
OUT
I
(CMOS), CE = VCC ± 0.3V 100 µA
SB1
I
(TTL), CE = 2.0 to V
SB2
VCC Active Current f = 5 MHz, I
CC
CC
CC
= 0 mA, CE = V
OUT
+ 0.5V 1 mA
CC
IL
Input Low Voltage -0.6 0.8 V
Input High Vo ltage 2.0 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 or before VPP, and removed simultaneously 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.
AC Characteristics for Read Operation
AT27C040
-70 -90 -12 -15
Symbol Parameter Condition
= OE
t
t
t
t
ACC
CE
OE
DF
(3)
(2)
(2)(3)
(4)(5)
Address to Output Delay
CE to Output Delay OE = V
OE to Output Delay CE = V
OE or CE High to Output Float, whichever
occurred first
CE
= V
IL
IL
Min Max Min Max Min Max Min Max
IL
70 90 120 150 ns
70 90 120 150 ns
30 35 35 40 ns
20 20 30 30 ns
±1 µA
±5 µA
10 µA
30 mA
+ 0.5 V
CC
Units
t
OH
Output Hold from Address, CE or OE,
whichever occurred f irst
Notes: 1. 2, 3, 4, 5 - see AC Waveforms for Read Operation
4
AT27C040
0000ns
Page 5
AT27C040
OUTPUT
PIN
1.3V
(1N914)
3.3K
CL
AC Waveforms for Read Operation
Notes: 1. Tiiming measurement refere nces are 0.8V and 2.0V. Input AC drive levels are 0.45V and 2.4V, unless otherwise specified.
2. OE may be delayed up to tCE - tOE after the falling edge of CE without impact on tCE.
3. OE may be delayed up to t
4. This parameter is only sampled and is not 100% tested.
5. Output float is defined as the point when data is no longer driven.
- tOE after the address is valid without impact on t
ACC
(1)
ACC
.
Input Test Waveforms and
Output Test Load
Measurement Levels
Pin Capacitance
f = 1 MHz, T = 25°C
Symbol Ty p Max Units Conditions
C
IN
C
OUT
Note: 1. Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested.
(1)
48pFV
812pFV
IN
OUT
= 0V
= 0V
5
Page 6
Programming Waveforms
(1)
Notes: 1. The Input Timing Reference is 0.8V for VIL and 2.0V for VIH.
2. tOE and t
are characteristics of the device but must be accommodated by the programmer.
DFP
3. When programming the AT27C040 a 0.1 µF capacitor is required across VPP and ground to supress spurious voltage transients.
DC Programming Characteristics
TA = 25 ± 5°C, VCC = 6.5 ± 0.25V, VPP = 13.0 ± 0.25V
Symbol Parameter Test Conditions
I
V
V
V
V
I
I
V
LI
IL
IH
OL
OH
CC2
PP2
ID
Input Load Current V
Input Low Level -0.6 0.8 V
Input High Level 2.0 V
Output Low Voltage IOL = 2.1 mA 0.4 V
Output High Voltage I
VCC Supply Current (Program and Verify) 40 mA
VPP Supply Current CE = V
A9 Product Identification Voltage 11.5 12.5 V
= VIL, V
IN
OH
IH
= -400 µA 2.4 V
IL
Limits
10 µA
±
+ 0.7 V
CC
20 mA
UnitsMin Max
6
AT27C040
Page 7
AC Programming Characteristics
TA = 25 ± 5°C, VCC = 6.5 ± 0.25V, VPP = 13.0 ± 0.25V
Symbol Parameter Test Conditions
AT27C040
Limits
(1)
UnitsMin Max
t
t
t
t
t
t
t
t
t
t
t
AS
OES
DS
AH
DH
DFP
VPS
VCS
PW
OE
PRT
Address Setup Time
OE Setup Time 2
Data Setup Time 2
Input Rise and Fall Times :
(10% to 90%) 20 ns
Address Hold Time 0
Data Hold Time 2
OE High to Output Float Delay
(2)
VPP Setup Time 2
VCC Setup Time 2
CE Program Pulse Width
Data Valid from OE
(3)
(2)
Input Pulse Levels:
0.45V to 2.4V
Input Timing Reference Level:
0.8V to 2.0 V
Output Timing Reference Level:
0.8V to 2.0 V
VPP Pulse Rise Time During
Programming
2
0 130 ns
95 105
50 ns
Notes: 1. VCC must be applied simultaneously or before VPP and removed simultaneously or after VPP.
2. 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.
±
µsec
3. Program Pulse width tolerance is 100
5%.
Atmel’s 27C040 Integrated Product Identifi cation Code
Pins
Codes
µ
µ
µ
µ
µ
µ
µ
µ
150 ns
Hex DataA0 O7 O6 O5 O4 O3 O2 O1 O0
s
s
s
s
s
s
s
s
Manufacturer 000011110 1E
Device Type 100001011 0B
7
Page 8
Rapid Programming Algorithm
A 100 µs CE pulse width is used to program. The address
is set to the first location. V
raised to 13.0V. Each address is first programmed with one
100 µs CE
tion/reprogramming loo p is exec uted for each addres s. In
the event a byte fails to pass verification, up to 10 successive 100 µs pulses are app lie d with a ver if icat ion afte r eac h
pulse without verification. Then a verifica-
is raised to 6.5V and VPP is
CC
pulse. If the by te fails to v erify afte r 10 pulses ha ve been
applied, the part is consi dered fai led. Afte r the byte ve rifies
properly, the next address is selected until all have been
checked. V
bytes are read again and compared with the original data to
determine if the device passes or fails.
is then lowered to 5.0V and VCC to 5.0V. All
PP
8
AT27C040
Page 9
Ordering Information
I
(mA)
CC
t
(ns)
ACC
70 30 0.1 AT27C040-70JC
30 0.1 AT27C040-70JI
90 30 0.1 AT27C040-90JC
30 0.1 AT27C040-90JI
120 30 0.1 AT27C040-12JC
30 0.1 AT27C040-12JI
150 30 0.1 AT27C040-15JC
30 0.1 AT27C040-15JI
Ordering Code Package Operation RangeActive Standby
AT27C040-70PC
AT27C040-70RC
AT27C040-70TC
AT27C040-70PI
AT27C040-70RI
AT27C040-70TI
AT27C040-90PC
AT27C040-90RC
AT27C040-90TC
AT27C040-90PI
AT27C040-90RI
AT27C040-90TI
AT27C040-12PC
AT27C040-12RC
AT27C040-12TC
AT27C040-12PI
AT27C040-12RI
AT27C040-12TI
AT27C040-15PC
AT27C040-15RC
AT27C040-15TC
AT27C040-15PI
AT27C040-15RI
AT27C040-15TI
32J
32P6
32R
32T
32J
32P6
32R
32T
32J
32P6
32R
32T
32J
32P6
32R
32T
32J
32P6
32R
32T
32J
32P6
32R
32T
32J
32P6
32R
32T
32J
32P6
32R
32T
AT27C040
Commercial
(0°C to 70°C)
Industrial
(-40°C to 85°C)
Commercial
(0°C to 70°C)
Industrial
(-40°C to 85°C)
Commercial
(0°C to 70°C)
Industrial
(-40°C to 85°C)
Commercial
(0°C to 70°C)
Industrial
(-40°C to 85°C)
Package Type
32J 32-Lead, Plastic J-Leaded Chip Carrier (PLCC)
32P6 32-Lead, 0.600" Wide, Plastic Dual Inline Package (PDIP)
32R 32-Lead, 0.450" Wide, Plastic Gull Wing Small Outline (SOIC)
32T 32-Lead, Plastic Thin Small Outline Package (TSOP)
9
Page 10
Packaging Information
32J
, 32-Lead, Plastic J-Leaded Chip Carrier (PLCC)
Dimensions in Inches and (Millimeters)
JEDEC STANDARD MS-016 AE
32P6
, 32-Lead, 0.600" Wide, Plastic Dual Inline
Package (PDIP)
Dimensions in Inches and (Millimeters)
.045(1.14) X 45˚
PIN NO.1
.025(.635) X 30˚ - 45˚
IDENTIFY
.553(14.0)
.032(.813)
.026(.660)
.050(1.27) TYP
.547(13.9)
.595(15.1)
.585(14.9)
.300(7.62) REF
.430(10.9)
.390(9.90)
AT CONTACT
POINTS
.022(.559) X 45˚ MAX (3X)
.453(11.5)
.447(11.4)
.495(12.6)
.485(12.3)
32R
, 32-Lead, 0.440" Wide, Plastic Gull Wing Small
Outline (SOIC)
Dimensions in Inches and (Millimeters)
.012(.305)
.008(.203)
.530(13.5)
.490(12.4)
.021(.533)
.013(.330)
.030(.762)
.015(.381)
.095(2.41)
.060(1.52)
.140(3.56)
.120(3.05)
1.67(42.4)
1.64(41.7)
.220(5.59)
MAX
SEATING
PLANE
.161(4.09)
.125(3.18)
.110(2.79)
.090(2.29)
.012(.305)
.008(.203)
32T
, 32-Lead, Plastic Thin Small Outline Package
1.500(38.10) REF
.065(1.65)
.041(1.04)
.630(16.0)
.590(15.0)
.690(17.5)
.610(15.5)
PIN
1
.022(.559)
.014(.356)
0
REF
15
(TSOP)
Dimensions in Millimeters and (Inches)*
JEDEC OUTLINE MO-142 BD
.566(14.4)
.530(13.5)
.090(2.29)
.005(.127)
.065(1.65)
.015(.381)
MAX
MIN
10
AT27C040
INDEX
MARK
0.50(.020)
BSC
0
REF
5
7.50(.295)
REF
8.20(.323)
7.80(.307)
0.15(.006)
0.05(.002)
18.5(.728)
18.3(.720)
0.25(.010)
0.15(.006)
0.70(.028)
0.50(.020)
20.2(.795)
19.8(.780)
1.20(.047) MAX
*Controlling dimension: millimeters
0.20(.008)
0.10(.004)
Page 11
AT27C040
11
Page 12
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Corporate Headquarters
2325 Orchard Parkway
San Jose, CA 95131
TEL (408) 441- 0311
FAX (408) 487-2600
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TEL (852) 27219778
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North America:
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International:
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e-mail
literature@atmel.com
Web Site
http://www.atmel.com
BBS
1-(408) 436-4309
© Atmel Corporation 1998.
Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty which is detailed in Atmel’s Terms and Conditions located on the Company’s website. The Company assumes no responsibility for
any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without
notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are
not authorized for use as critical components in life support devices or systems.
®
Marks bearing
Terms and product names in this document may be trademarks of others.
and/or ™ are registered trademarks and trademarks of Atmel Corporation.
Printed on recycled paper.
0189E–07/97/xM
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