ATMEL AT27BV256-15TC 256k 32k x 8 unregulated battery-voltage high speed otp cmos eprom Datasheet

AT27BV256
Features
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Fast Read Access Time - 70 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 AT27C256
Low Power CMOS Operation
20 µA max. (less than 1 µA typical) Standby for VCC = 3.6V
29 mW max. Active at 5 MHz for VCC = 3.6V
JEDEC Standard Surface Mount Packages
32-Lead PLCC
28-Lead 330-mil SOIC
28-Lead TSOP
High Reliability CMOS Technology
2,000V ESD Protection
200 mA Latchup Immunity
Rapid Programming Algorithm - 100 µs/byte (typical)
CMOS and TTL Compatible Inputs and Outputs
JEDEC Standard for LVTTL and LVBO
Integrated Product Identification Code
Commercial and Industrial Temperature Ranges
Description
256K (32K x 8)
Unregulated
Battery-Voltage
High Speed
OTP
CMOS EPROM
The AT27BV256 is a high performance, low power, low voltage 262,144 bit one-time
programmable read only memory (OTP EPROM) organized as 32K by 8 bits. It requires only one supply in the range of 2.7V to 3.6V in normal read mode operation,
making it ideal for fast, portable systems using either regulated or unregulated battery
power.
Atmel’s innovative design techniques provide fast speeds that rival 5V parts while
keeping the low power consumption of a 3V supply. At VCC = 2.7V, any word can be
accessed in less than 70 ns. With a typical power dissipation of only 18 mW at 5 MHz
and VCC = 3V, the AT27BV256 consumes less than one fifth the power of a standard
5V EPROM.
(continued) AT27BV256
Pin Configurations
Pin Name
Function
A0 - A14
Addresses
O0 - O7
Outputs
CE
Chip Enable
OE
Output Enable
NC
No Connect
SOIC Top View
PLCC Top View
TSOP Top View
Type 1
Note: PLCC Package Pins 1
and 17 are DON’T CONNECT.
0601A
3-3
Description (Continued)
System Considerations
Standby mode supply current is typically less than 1 µA at
3V. The AT27BV256 simplifies system design and
stretches battery lifetime even further by eliminating the
need for power supply regulation.
Switching between active and standby conditions via the
Chip Enable pin may produce transient voltage excursions. Unless accommodated by the system design, these
transients 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 utilized 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 AT27BV256 is available in industry standard JEDECapproved one-time programmable (OTP) plastic PLCC,
SOIC and TSOP packages. All devices feature two-line
control (CE, OE) to give designers the flexibility to prevent
bus contention.
The AT27BV256 operating with VCC at 3.0V produces TTL
level outputs that are compatible with standard TTL logic
devices operating at VCC = 5.0V. At VCC = 2.7V, the part
is compatible with JEDEC approved low voltage battery
operation (LVBO) interface specifications. The device is
also capable of standard 5-volt operation making it ideally
suited for dual supply range systems or card products that
are pluggable in both 3-volt and 5-volt hosts.
Atmel’s AT27BV256 has additional features to ensure
high quality and efficient production use. The Rapid Programming Algorithm reduces the time required to program
the part and guarantees reliable programming. Programming time is typically only 100 µs/byte. 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. The AT27BV256
programs exactly the same way as a standard 5V
AT27C256R and uses the same programming equipment.
3-4
AT27BV256
AT27BV256
Absolute Maximum Ratings*
Block Diagram
Temperature Under Bias .................. -40°C to +85°C
Storage Temperature...................... -65°C to +125°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)
VPP Supply Voltage with
Respect to Ground....................... -2.0V to +14.0V (1)
*NOTICE: Stresses beyond those listed under “Absolute Maximum 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 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 reliability.
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 VCC + 0.75V dc which may be exceeded if certain precautions are observed (consult
application notes) and which may overshoot to
+7.0V for pulses of less than 20 ns.
Operating Modes
CE
Mode \ Pin
(2)
Read
VIL
Output Disable
(2)
Standby (2)
Rapid
VIH
Program (3)
PGM Verify
(3)
Optional PGM
PGM
VIL
VIL
X
Verify (3)
Inhibit (3)
VIL
VIH
OE
Ai
VIL
VPP
Ai
VIH
X
X
X
VIH
VIL
VCC
High Z
VCC
(2)
High Z
VCC
(3)
DIN
VCC
(3)
DOUT
VCC
(3)
DOUT
VPP
VCC
(3)
High Z
VCC
VCC (3)
VCC
VPP
Ai
VIH
DOUT
(2)
VPP
Ai
VIL
VCC
VCC
Ai
VCC
X
Outputs
(2)
VCC
(1)
VCC
(4)
Product Identification (3, 5)
VIL
VIL
A9 = VH
A0 = VIH or VIL
A1 - A14 = VIL
Notes: 1. X can be VIL or VIH.
2. Read, output disable, and standby modes require,
2.7V ≤ VCC ≤ 3.6V, or 4.5V ≤ VCC ≤ 5.5V.
3. Refer to Programming Characteristics. Programming
modes require VCC = 6.5V.
Identification
Code
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 toggled low (VIL) to select the Manufacturer’s Identification byte and high (VIH) to select the Device Code byte.
3-5
DC and AC Operating Conditions for Read Operation
AT27BV256
Com.
Operating Temperature (Case)
Ind.
VCC Power Supply
-70
0°C - 70°C
-40°C - 85°C
2.7V to 3.6V
5V ± 10%
-90
0°C - 70°C
-40°C - 85°C
2.7V to 3.6V
5V ± 10%
-12
0°C - 70°C
-40°C - 85°C
2.7V to 3.6V
5V ± 10%
-15
0°C - 70°C
-40°C - 85°C
2.7V to 3.6V
5V ± 10%
DC and Operating Characteristics for Read Operation
Symbol
Parameter
Condition
Min
Max
Units
VCC = 2.7V to 3.6V
ILI
ILO
IPP1
(2)
Input Load Current
VIN = 0V to VCC
±1
µA
Output Leakage Current
VOUT = 0V to VCC
±5
µA
VPP = VCC
10
µA
ISB1 (CMOS), CE = VCC ± 0.3V
20
µA
ISB2 (TTL), CE = 2.0 to VCC + 0.5V
100
µA
8
mA
VPP
(1)
Read/Standby Current
VCC (1) Standby Current
ISB
ICC
VCC Active Current
VIL
Input Low Voltage
VIH
Input High Voltage
VOL
Output Low Voltage
VOH
Output High Voltage
f = 5 MHz, IOUT = 0 mA, CE = VIL, VCC = 3.6V
VCC = 3.0 to 3.6V
-0.6
0.8
V
VCC = 2.7 to 3.6V
-0.6
0.2 x VCC
V
VCC = 3.0 to 3.6V
2.0
VCC + 0.5
V
0.7 x VCC VCC + 0.5
V
VCC = 2.7 to 3.6V
IOL = 2.0 mA
0.4
V
IOL = 100 µA
0.2
V
IOL = 20 µA
0.1
V
IOH = -2.0 mA
2.4
V
IOH = -100 µA
VCC - 0.2
V
IOH = -20 µA
VCC - 0.1
V
VCC = 4.5V to 5.5V
ILI
ILO
IPP1
(2)
Input Load Current
VIN = 0V to VCC
±1
µA
Output Leakage Current
VOUT = 0V to VCC
±5
µA
VPP = VCC
10
µA
ISB1 (CMOS), CE = VCC ± 0.3V
100
µA
ISB2 (TTL), CE = 2.0 to VCC + 0.5V
1
mA
f = 5 MHz, IOUT = 0 mA, CE = VIL
20
mA
VPP
(1)
Read/Standby Current
ISB
VCC (1) Standby Current
ICC
VCC Active Current
VIL
Input Low Voltage
-0.6
0.8
V
VIH
Input High Voltage
2.0
VCC + 0.5
V
VOL
Output Low Voltage
IOL = 2.1 mA
0.4
V
VOH
Output High Voltage
IOH = -400 µA
Notes: 1. VCC must be applied simultaneously with or before
VPP, and removed simultaneously with or after
VPP.
3-6
AT27BV256
2.4
V
2. VPP may be connected directly to VCC, except during programming. The supply current would then be the sum of ICC
and IPP.
AT27BV256
AC Characteristics for Read Operation (VCC = 2.7V to 3.6V and 4.5V to 5.5V)
AT27BV256
-70
Symbol
tACC
(3)
Parameter
Condition
Min
Max
-90
Min
Max
-12
Min
-15
Max
Min
Max
Units
Address to Output Delay
CE = OE = VIL
70
90
120
150
ns
tCE
(2)
CE to Output Delay
OE = VIL
70
90
120
150
ns
tOE
(2, 3)
OE to Output Delay
CE = VIL
50
50
50
60
ns
40
40
40
50
ns
tDF (4, 5)
OE or CE High to Output Float,
whichever occurred first
tOH
Output Hold from Address, CE or OE,
whichever occurred first
Notes:
0
0
0
0
ns
2, 3, 4, 5. - see AC Waveforms for Read Operation.
AC Waveforms for Read Operation
(1)
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 may be delayed up to tCE-tOE after the falling
edge of CE without impact on tCE.
3. OE may be 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.
6. When reading a 27BV256, a 0.1 µF capacitor is required
across VCC and ground to supress spurious voltage transients.
3-7
Input Test Waveform and Measurement Level
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)
Typ
Max
Units
CIN
4
8
pF
VIN = 0V
COUT
8
12
pF
VOUT = 0V
Note:
3-8
(1)
Conditions
1. Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested.
AT27BV256
AT27BV256
Programming Waveforms
(1)
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
must be accommodated by the programmer.
3. When programming the AT27BV256 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
Symbol
Parameter
Test
Conditions
ILI
Input Load Current
VIN = VIL, VIH
VIL
Input Low Level
VIH
Input High Level
VOL
Output Low Voltage
IOL = 2.1 mA
VOH
Output High Voltage
IOH = -400 µA
ICC2
VCC Supply Current (Program and Verify)
IPP2
VPP Current
VID
A9 Product Identification Voltage
Limits
Max
Units
±10
µA
-0.6
0.8
V
2.0
VCC + 0.5
V
0.4
V
Min
2.4
CE = VIL
11.5
V
25
mA
25
mA
12.5
V
3-9
AC Programming Characteristics
Rapid Programming Algorithm
TA = 25 ± 5°C, VCC = 6.5 ± 0.25V, VPP = 13.0 ± 0.25V
A 100 µs CE pulse width is used to program. The address
is set to the first location. VCC is raised to 6.5V and VPP is
raised to 13.0V. Each address is first programmed with
one 100 µs CE pulse without verification. Then a verification / reprogramming loop is executed for each address.
In the event a byte fails to pass verification, up to 10 successive 100 µs pulses are applied with a verification after
each pulse. If the byte fails to verify after 10 pulses have
been applied, the part is considered failed. After the byte
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 bytes are read again and compared with the
original data to determine if the device passes or fails.
Symbol
Parameter
Limits
Test
(1)
Conditions*
Max Units
Min
Address Setup
Time
2
µs
tOES OE Setup Time
2
µs
tDS
Data Setup Time
2
µs
tAH
Address Hold Time
0
µs
tDH
Data Hold Time
2
µs
tDFP
OE High to Output Float Delay (2)
0
tVPS
VPP Setup Time
2
µs
tVCS
VCC Setup Time
2
µs
tPW
CE Program Pulse
Width (3)
Data Valid
from OE (2)
VPP Pulse Rise Time During
Programming
tAS
tOE
tPRT
130
95
ns
105
µs
150
ns
50
ns
*AC Conditions of Test:
Input Rise and Fall Times (10% to 90%)...........20 ns
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
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.
3. Program Pulse width tolerance is 100 µsec ± 5%.
Atmel’s 27BV256 Integrated (1)
Product Identification Code
Pins
Codes
Manufacturer
Device Type
Note:
3-10
A0 O7 O6 O5 O4 O3 O2 O1 O0
0
1
0
1
0
0
0
0
1
0
1
1
1
1
1
0
0
0
Hex
Data
1E
8C
1. The AT27BV256 has the same Product Identification
Code as the AT27C256R. Both are programming
compatible.
AT27BV256
AT27BV256
Ordering Information
ICC (mA)
tACC
(ns)
Active
Standby
70
8
90
120
150
Ordering Code
Package
Operation Range
0.02
AT27BV256-70JC
AT27BV256-70RC
AT27BV256-70TC
32J
28R
28T
Commercial
(0°C to 70°C)
8
0.02
AT27BV256-70JI
AT27BV256-70RI
AT27BV256-70TI
32J
28R
28T
Industrial
(-40°C to 85°C)
8
0.02
AT27BV256-90JC
AT27BV256-90RC
AT27BV256-90TC
32J
28R
28T
Commercial
(0°C to 70°C)
8
0.02
AT27BV256-90JI
AT27BV256-90RI
AT27BV256-90TI
32J
28R
28T
Industrial
(-40°C to 85°C)
8
0.02
AT27BV256-12JC
AT27BV256-12RC
AT27BV256-12TC
32J
28R
28T
Commercial
(0°C to 70°C)
8
0.02
AT27BV256-12JI
AT27BV256-12RI
AT27BV256-12TI
32J
28R
28T
Industrial
(-40°C to 85°C)
8
0.02
AT27BV256-15JC
AT27BV256-15RC
AT27BV256-15TC
32J
28R
28T
Commercial
(0°C to 70°C)
8
0.02
AT27BV256-15JI
AT27BV256-15RI
AT27BV256-15TI
32J
28R
28T
Industrial
(-40°C to 85°C)
Package Type
32J
32 Lead, Plastic J-Leaded Chip Carrier (PLCC)
28R
28 Lead, 0.330" Wide, Plastic Gull Wing Small Outline (SOIC)
28T
28 Lead, Plastic Thin Small Outline Package (TSOP)
3-11
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