AT27C400-90RI [ATMEL]
4-Megabit 256K x 16 or 512K x 8 OTP EPROM; 4兆位256K ×16或512K ×8 OTP EPROM
| 型号： | AT27C400-90RI |
| 厂家： | 
ATMEL |
| 描述： | 4-Megabit 256K x 16 or 512K x 8 OTP EPROM |
| 文件： | 总10页 (文件大小：188K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Features
• Fast Read Access Time - 70 ns
• Word-wide or Byte-wide Configurable
• 4 Megabit Flash and Mask ROM Compatible
• Low Power CMOS Operation
– 100 µA Maximum Standby
– 50 mA Maximum Active at 5 MHz
• Wide Selection of JEDEC Standard Packages
– 40-Lead 600 mil PDIP
– 40-Lead SOIC (SOP)
– 48-Lead TSOP (12 mm x 20 mm)
• 5V ± 10% Power Supply
4-Megabit
(256K x 16 or
512K x 8) OTP
EPROM
• High Reliability CMOS Technology
– 2,000V 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
AT27C400
Description
The AT27C400 is a low-power, high-performance 4,194,304-bit one-time programma-
ble read only memory (OTP EPROM) organized as either 256K by 16 or 512K by 8
bits. It requires a single 5V power supply in normal read mode operation. Any word
can be accessed in less than 70 ns, eliminating the need for speed-reducing WAIT
states. The by-16 organization makes this part ideal for high-performance 16- and 32-
bit microprocessor systems.
Preliminary
PDIP Top View
SOIC (SOP)
Pin Configurations
A17
A7
A6
A5
A4
A3
A2
A1
A0
1
2
3
4
5
6
7
8
9
40 A8
A17
A7
A6
A5
A4
A3
A2
A1
A0
1
2
3
4
5
6
7
8
9
40 A8
39 A9
39 A9
Pin Name
A0 - A17
O0 - O15
O15/A-1
Function
38 A10
37 A11
36 A12
35 A13
34 A14
33 A15
32 A16
31 BYTE/VPP
30 GND
29 015/A-1
28 O7
38 A10
37 A11
36 A12
35 A13
34 A14
33 A15
32 A16
31 BYTE/VPP
30 GND
29 015/A-1
28 O7
Addresses
Outputs
CE 10
GND 11
OE 12
O0 13
O8 14
O1 15
O9 16
O2 17
O10 18
O3 19
O11 20
CE 10
GND 11
OE 12
O0 13
O8 14
O1 15
O9 16
O2 17
O10 18
O3 19
O11 20
Output/Address
Byte Mode/
Program Supply
27 O14
26 O6
27 O14
26 O6
BYTE/VPP
25 O13
24 O5
25 O13
24 O5
CE
OE
NC
Chip Enable
Output Enable
No Connect
23 O12
22 O4
23 O12
22 O4
21 VCC
21 VCC
TSOP
Type 1
Note: Both GND pins must be
connected.
A15
A14
A13
A12
A11
A10
A9
1
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
A16
2
BYTE/VPP
GND
015/A-1
I/O7
O14
O6
3
4
5
6
7
A8
8
O13
O5
NC
NC
NC
NC
NC
NC
NC
NC
A17
A7
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
O12
O4
VCC
O11
O3
O10
O2
O9
O1
A6
O8
A5
O0
A4
OE
A3
GND
CE
0844A-A–7/97
A2
A1
A0
System Considerations
Description (Continued)
Switching between active and standby conditions via the
Chip Enable pin may produce transient voltage excursions.
Unless accommodated by the system design, these tran-
sients may exceed data sheet limits, resulting in device
non-conformance. At a minimum, a 0.1 µF high frequency,
low inherent inductance, ceramic capacitor should be uti-
lized for each device. This capacitor should be connected
between the VCC and Ground terminals of the device, as
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 VCC and Ground
terminals. This capacitor should be positioned as close as
possible to the point where the power supply is connected
to the array.
The AT27C400 can be organized as either word-wide or
byte-wide. The organization is selected via the BYTE/VPP
pin. When BYTE/VPP is asserted high (VIH), the word-wide
organization is selected and the O15/A-1 pin is used for
O15 data output. When BYTE/VPP is asserted low (VIL), the
byte-wide organization is selected and the O15/A-1 pin is
used for the address pin A-1. When the AT27C400 is logi-
cally regarded as x16 (word-wide), but read in the byte-
wide mode, then with A-1 = VIL the lower 8 bits of the 16-bit
word are selected and with A-1 = VIH the upper 8 bits of the
16-bit word are selected.
In read mode, the AT27C400 typically consumes 15 mA.
Standby mode supply current is typically less than 10 µA.
The AT27C400 is available in industry standard
JEDEC-approved one-time programmable (OTP) PDIP,
SOIC (SOP), and TSOP packages. The device features
two-line control (CE, OE) to eliminate bus contention in
high-speed systems.
With high density 256K word or 512K byte storage capabil-
ity, the AT27C400 allows firmware to be stored reliably and
to be accessed by the system without the delays of mass
storage media.
Atmel’s AT27C400 has additional features that ensure high
quality and efficient production use. The Rapid™ Program-
ming Algorithm reduces the time required to program the
part and guarantees reliable programming. Programming
time is typically only 50 µs/word. The Integrated Product
Identification Code electronically identifies the device and
manufacturer. This feature is used by industry standard
programming equipment to select the proper programming
algorithms and voltages.
AT27C400
2
AT27C400
Block Diagram
Absolute Maximum Ratings*
*NOTICE:
Stresses beyond those listed under “Absolute Maxi-
mum Ratings” may cause permanent damage to the
device. This is a stress rating only and functional
operation of the device at these or any other condi-
tions beyond those indicated in the operational sec-
tions of this specification is not implied. Exposure to
absolute maximum rating conditions for extended
periods may affect device reliability.
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 (1)
Voltage on A9 with
Respect to Ground ...........................-2.0V to +14.0V (1)
Note:
1. Minimum voltage is -0.6V dc which undershoot to -
2.0V for pulses of less than 20 ns. Maximum output
pin voltage is VCC + 0.75V dc which may overshoot to
+7.0V for pulses of less than 20 ns.
VPP Supply Voltage with
Respect to Ground ............................-2.0V to +14.0V (1)
Integrated UV Erase Dose...................7258 W •sec/cm2
Operating Modes
Outputs
Mode/Pin
CE
OE
Ai
BYTE/V
O - O
O - O
O /A-1
15
PP
0
7
8
14
OUT
(1)
(1)
(1)
(1)
(1)
Read Word-wide
Read Byte-wide Upper
Read Byte-wide Lower
Output Disable
Standby
V
V
V
V
V
V
X
X
X
X
X
V
D
D
D
D
D
OUT
IL
IL
IL
IL
IL
IH
OUT
V
V
High Z
High Z
High Z
High Z
V
IH
IL
IL
OUT
OUT
V
IL
IL
(1)
X
V
X
IH
(1)
(5)
V
X
X
IH
(2)
Rapid Program
V
V
Ai
Ai
V
V
V
D
IN
IL
IH
PP
PP
PP
PGM Verify
PGM Inhibit
X
V
D
OUT
IL
(1)
V
V
X
High Z
IH
IH
(3)
A9 = V
Identificatio
H
(4)
Product Identification
V
V
V
IH
n
A0 = V or V
A1 - A17 = V
IL
IL
IH
IL
IL
Code
Notes: 1. X can be VIL or VIH.
2. Refer to the programming characteristics tables in this data sheet.
3. VH = 12.0 ± 0.5V.
4. Two identifier words may be selected. All inputs are held low (VIL), except A9, which is set to VH, and A0, which is toggled
low (VIL) to select the Manufacturer’s Identification word and high (VIH) to select the Device Code word.
5. Standby VCC current (ISB) is specified with VPP = VCC. VCC > VPP will cause a slight increase in ISB.
3
DC and AC Operating Conditions for Read Operation
AT27C400
-70
-90
-12
-15
Operating
Temperature
(Case)
Com.
Ind.
0°C - 70°C
-40°C - 85°C
5V ± 10%
0°C - 70°C
-40°C - 85°C
5V ± 10%
0°C - 70°C
-40°C - 85°C
5V ± 10%
0°C - 70°C
-40°C - 85°C
5V ± 10%
VCC Power Supply
DC and Operating Characteristics for Read Operation
Symbol Parameter
Condition
Min
Max
± 1
± 5
10
Units
ILI
Input Load Current
VIN = 0V to VCC
VOUT = 0V to VCC
VPP = VCC
µA
µA
µA
ILO
Output Leakage Current
(2)
IPP1
VPP(1) Read/Standby Current
I
SB1 (CMOS)
100
1
µA
mA
mA
CE = VCC ± 0.3V
VCC(1) Standby Current
ISB
ISB2 (TTL)
CE = 2.0 to VCC + 0.5V
f = 5 MHz, IOUT = 0 mA,
CE = VIL
V
CC Active Current
40
VIL
Input Low Voltage
Input High Voltage
Output Low Voltage
Output High Voltage
-0.6
2.0
0.8
VCC + 0.5
0.4
V
V
V
V
VIH
VOL
VOH
IOL = 2.1 mA
IOH = -400 µA
2.4
Notes: 1. VCC must be applied simultaneously or beofre 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
AT27C400
-70
-90
-12
-15
Symbol Parameter
Condition Min Max Min Max Min Max Min Max Units
Address to
CE = OE
(2)
tACC
70
90
120
150
ns
= VIL
OE = VIL
CE = VIL
Output Delay
(2)
tCE
CE to Output Delay
70
30
90
35
120
40
150
50
ns
ns
(2)(3)
tOE
OE to Output Delay
OE or CE High to Output Float,
whichever occurred first
(4)(5)
tDF
20
20
30
35
ns
ns
Output Hold from Address,
CE or OE, whichever occurred first
(4)
tOH
5
5
5
5
tST
BYTE High to Output Valid
70
40
90
40
120
50
150
60
ns
ns
tSTD
BYTE Low to Output Transition
Notes: 2, 3, 4, 5. See the AC Waveforms for Read Operation diagram.
= Advance Information
AT27C400
4
AT27C400
Byte-Wide Read Mode AC Waveforms
Note:
BYTE/VPP = VIL
Word-Wide Read Mode AC Waveforms
Note:
BYTE/VPP = VIH
BYTE Transition AC Waveforms
Notes: 1. Timing measurement references are 0.8V and 2.0V. Input AC drive levels are 0.45V and 2.4V, unless otherwise specified.
2. OE maybe delayed up to tCE - tOE after the falling edge of CE without impact on tCE
3. OE maybe delayed up to tACC - tOE after the address is valid without impact on tACC
.
.
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.
5
Input Test Waveforms and Measurement Levels
Output Test Load
tR, tF < 20 ns (10% to 90%)
Note:
CL = 100 pF including jig capacitance.
Pin Capacitance
(f = 1 MHz T = 25°C)
(1)
Typ
4
Max
10
Units
pF
Conditions
VIN = 0V
CIN
COUT
8
12
pF
VOUT = 0V
Note:
1. Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested.
AT27C400
6
AT27C400
(1)
Programming Waveforms
Notes: 1. The Input Timing Reference is 0.8V for VIL and 2.0V for VIH.
2. tOE and tDFP are characteristics of the device but mist be accomodated by the programmer.
3. When programming the AT27C400, a 0.1 µF capacitor is required across VPP and ground to suppress spurious voltage
transients.
DC Programming Characteristics
TA = 25 ± 5°C, VCC = 6.5 ± 0.25V, VPP = 13.0 ± 0.25V
Limits
Symbol
ILI
Parameter
Test Conditions
Min
Max
±10
0.8
Units
µA
Input Load Current
Input Low Level
VIN = VIL, VIH
VIL
-0.6
2.0
V
VCC
+
VIH
Input High Level
V
0.5
VOL
VOH
Output Low Voltage
Output High Voltage
IOL = 2.1 mA
0.4
V
V
IOH = -400 µA
2.4
VCC Supply Current
(Program and Verify)
ICC2
50
mA
IPP2
VID
VPP Supply Current
CE = VIL
30
mA
V
A9 Product Identification Voltage
11.5
12.5
7
AC Programming Characteristics
TA = 25 ± 5°C, VCC = 6.5 ± 0.25V, VPP = 13.0 ± 0.25V
Limits
Symbol Parameter
Test Conditions(1)
Min
Max
Units
µs
tAS
Address Setup Time
OE Setup Time
2
2
2
0
2
tOES
tDS
tAH
tDH
µs
Data Setup Time
Address Hold Time
Data Hold Time
µs
µs
Input Rise and Fall Times
(10% to 90%) 20ns
Input Pulse Levels
0.45V to 2.4V
Input Timing Reference Level
0.8V to 2.0V
Output Timing Reference Level
0.8V to 2.0V
µs
OE High to
tDFP
0
130
ns
Output Float Delay(2)
tVPS
tVCS
tPW
tOE
VPP Setup Time
2
2
µs
µs
µs
ns
VCC Setup Time
CE Program Pulse Width(3)
47.5
52.5
150
Data Valid from OE
BYTE/VPP Pulse Rise Time
During Programming
tPRT
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. Ouput Float is defined as the point where data is no longer driven — see timing diagram.
3. Program Pulse width tolerance is 50 µsec ± 5%.
Atmel’s 27C400 Integrated Product Identification Code
Pins
A0
O15
O7
0
O14
O6
0
O13
O5
0
O12
O4
1
O11
O3
1
O10
O2
1
O9
O1
1
O8
Hex
Data
Codes
O0
0
Manufacturer
Device Type
0
1
1E1E
F4F4
1
1
1
1
0
1
0
0
AT27C400
8
AT27C400
Rapid Programming Algorithm
A 50 µs CE pulse width is used to program. The address is
set to the first location. VCC is raised to 6.5V and BYTE/VPP
is raised to 13.0V. Each address is first programmed with
one 50 µs CE pulse without verification. Then a verification/
reprogramming loop is executed for each address. In the
event a word fails to pass verification, up to 10 successive
50 µs pulses are applied with a verification after each
pulse. If the word fails to verify after 10 pulses have been
applied, the part is considered failed. After the word verifies
properly, the next address is selected until all have been
checked. VPP is then lowered to 5.0V and VCC to 5.0V. All
words are read again and compared with the original data
to determine if the device passes or fails.
9
Ordering Information
ICC (mA)
tACC
(ns)
Active
Standby
Ordering Code
Package
Operation Range
40
0.1
AT27C400-70PC
AT27C400-70RC
AT27C400-70TC
40P6
40R
48T
Commercial
(0°C to 70°C)
70
40
40
40
40
40
40
40
0.1
0.1
0.1
0.1
0.1
0.1
0.1
AT27C400-70PI
AT27C400-70RI
AT27C400-70TI
40P6
40R
48T
Industrial
(-40°C to 85°C)
AT27C400-90PC
AT27C400-90RC
AT27C400-90TC
40P6
40R
48T
Commercial
(0°C to 70°C)
90
AT27C400-90PI
AT27C400-90RI
AT27C400-90TI
40P6
40R
48T
Industrial
(-40°C to 85°C)
AT27C400-12PC
AT27C400-12RC
AT27C400-12TC
40P6
40R
48T
Commercial
(0°C to 70°C)
120
150
AT27C400-12PI
AT27C400-12RI
AT27C400-12TI
40P6
40R
48T
Industrial
(-40°C to 85°C)
AT27C400-15PC
AT27C400-15RC
AT27C400-15TC
40P6
40R
48T
Commercial
(0°C to 70°C)
AT27C400-15PI
AT27C400-15RI
AT27C400-15TI
40P6
40R
48T
Industrial
(-40°C to 85°C)
= Advance Information
Package Type
40-Lead, 0.600" Wide, Plastic Dual Inline Package (PDIP)
40P6
40R
48T
40-Lead, 0.450" Wide, Plastic Gull Wing Small Outline Package (SOIC/SOP)
48-Lead, Plastic Thin Small Outline Package (TSOP) 12 x 20 mm
AT27C400
10
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