Page 1
A276308A
Preliminary 64K X 8 OTP CMOS EPROM
Document Title
64K X 8 OTP CMOS EPROM
Revision History
Rev. No. History Issue Date Remark
0.0 Initial issue March 24, 2000 Preliminary
PRELIMINARY (March, 2000, Version 0.0) AMIC Technology, Inc.
Page 2
A276308A
Preliminary 64K X 8 OTP CMOS EPROM
Features
n 65,536 X 8 bit organization
n Programming voltage: 12.75V
n Access time: 55/70/90 ns (max.)
n Current: Operating: 30mA (max.) at 5MHz
Standby: 100µA (max.)
General Description
The A276308A chip is a high-performance 524,288 bit
one-time programmable read only memory (OTP
EPROM) organized as 64K by 8 bits. The A276308A
requires only 5V power supply in normal read mode
Pin Configurations
n DIP n PLCC
A15
A12
I/O0
I/O1
I/O2
GND
1
2
A7
3
A6
4
A5
5
A4
6
A3
7
A2
8
A1
9
10
A0
11
12
13
14 15
A276308A
VCC
28
A14
27
A13
26
A8
25
A9
24
A11
23
22
OE / VPP
A10
21
20
CE
19
I/O7
18
I/O6
I/O5
17
I/O4
16
I/O3
n All inputs and outputs are directly TTL-compatible
n Available in 28-pin DIP and 32-PLCC packages
operation and any input signals are TTL levels. The
A276308A is available in industry standard 28 pin dualin-line and 32 lead PLCC packages.
A7
A12
A15
NC
VCC
A14
A13
1
2
3
NC
I/O0
4
A6
A5
A4
A3
A2
A1
A0
5
6
7
8
9
10
11
12
13
A276308AL
141615
32
31
30
29
28
27
26
25
24
23
22
21
17
18
19
20
A8
A9
A11
NC
OE / VPP
A10
CE
I/O7
I/O6
I/O1
I/O2
GND
NC
I/O3
I/O4
I/O5
PRELIMINARY (March, 2000, Version 0.0) 1 AMIC Technology, Inc.
Page 3
Pin Configurations
CE
OE
CE
OE
A276308A
Pin Name Function
A0-A15 Address Inputs
I/O7-I/O0 Data Inputs / Outputs
Chip Enable
/ VPP
Output Enable / Program Power Supply
VCC Power Supply
GND Ground
NC No Internal Connection
Operating Modes and Truth Table
Mode
/ VPP
Read VIL VIL X X X VCC Data Out
Output Disable VIL VIH X X X VCC Hi-Z
Standby VIH X X X X VCC Hi-Z
Program VIL 12.75V X X X 6.25V Data In
Program Verify VIL VIL X X X VCC Data Out
A0 A1 A9 VCC I/O7-I/O0
Program Inhibit VIH 12.75V X X X 6.25V Hi-Z
Manufacturer Code
Device Code
Continuation Code
(3)
(3)
(3)
VIL VIL VIL VIL VID VCC 37H
VIL VIL VIH VIL VID VCC 2CH
VIL VIL VIL VIH VID VCC 7FH
Notes:
1. X = Either VIH or VIL.
2. VID = 12V ± 0.5V.
3. A2 ~ A8 = A10 ~ A15 = VIL (For auto identification)
PRELIMINARY (March, 2000, Version 0.0) 2 AMIC Technology, Inc.
Page 4
Functional Description
A276308A
Read Mode
The A276308A has two control functions, both of which
must be logically active in order to obtain data at the
outputs. CE is the power control and should be used for
device selection. OE is the output control and should be
used to data to the output pins, which is independent of
device selection. Assuming that addresses are stable,
address access time (tAA) is equal to the delay from CE
to output (tCE). Data is available at the output after a
delay (tOE) from the falling edge of OE , as long as CE
has been low and the addresses have been stable for at
least tAA - tOE.
Standby Mode
The A276308A has a standby mode which reduces the
active current from 30mA to 100µA. The A276308A is
placed in the standby mode by applying a CMOS high
signal to CE . When in the standby mode, the output are
in a high impedance state, independent of the OE .
Absolute Maximum Ratings*
Ambient Operating Temperature (TA) . . . . -10°C to +85°C
Storage Temperature Plastic Package (T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55°C to 125°C
Applied Input Voltage (VI):
All Pins Except A9, VPP and VCC . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . -0.6V to VCC + 0.6V
A9, VPP . . . . . . . . . . . . . . . . . . . . . . . . -0.6V to 13.5V
VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.6V to 7.0V
Output Voltage (VO) . . . . . . . . . . . . -0.6V to 7.0V (Note 1)
) . . . . . . . . . .
STG
Auto Identify Mode
The auto identify mode allows the reading out of a binary
code from a EPROM that will identify its manufacturer
and type. This mode is intended for use by programming
equipment for the purpose of automatically matching the
device to be programmed with its corresponding
programming algorithm.
To activate the mode, the programming equipment must
apply 12.0V ± 0.5V on address line A9 of the A276308A.
Three identification code can be read from data output pin
by toggling A0 and A1. The other addresses must be held
at VIL during this mode. Byte 0 (with A0 at VIL, A1 at VIL)
represents the manufacturer code which is 37H. Byte 1
and Byte 2 represent the device code and continuation
code, which is 2CH and 7FH respectively. All identifiers
for these codes will possess odd parity, with MSB (IO7)
defined the parity bit.
*Comments
Stresses above those listed under "Absolute Maximum
Ratings" may cause permanent damage to this device.
These are stress ratings only. Functional operation of
this device at these or any other conditions above those
indicated in the operational sections of this specification
is not implied or intended. Exposure to the absolute
maximum rating conditions for extended periods may
affect device reliability.
Notes:
1. During voltage transitions, the input may undershoot GND to -2.0V for periods less than 20 ns. Maximum DC voltage on
input and I/O may overshoot to VCC + 2.0V for periods less than 20 ns.
2. When transitions, A9 and VPP may undershoot GND to -2.0V for periods less than 20 ns. Maximum DC input voltage
on A9 and VPP is +13.5V which may overshoot to 14.0V for period less than 20 ns.
PRELIMINARY (March, 2000, Version 0.0) 3 AMIC Technology, Inc.
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A276308A
Read Mode DC Electrical Characteristics (Ta = 0°C to 70°C, VCC = 5V ± 10%, VPP = VCC)
Symbol Parameter Min. Max. Unit Conditions
VOH Output High Voltage 2.4 V
VOL Output Low Voltage 0.4 V IOL = 2.1mA
VIH Input High Voltage 2.0 VCC + 0.5 V
VIL Input Low Voltage -0.5 0.8 V
ILI Input Leakage Current -1 +1
ILO Output Leakage Current -1 +1
ICC VCC Read Operating Current 30 mA
ISB VCC Standby Current (TTL) 1 mA
ISB1 VCC Standby Current (CMOS) 100
IPP VPP Current During Read 10
µA
µA
µA
µA
IOH = -400µA
VCC = max.
Vin = 0V to VCC
VCC = max.
Vout = 0V to VCC
VCC = max.
CE = VIL, OE = VIL
Iout = 0mA, at 5MHz
VCC = max. CE = VIH
VCC = max.
CE = VCC - 0.2V
CE = OE = VIL,
VPP = VCC
IID A9 Auto Select Current 100
µA
A9 = VID, VCC = max.
Capacitance (TA = 25°C, f = 1.0MHz)
Symbol Parameter Min. Max. Unit Conditions
CIN Input Capacitance 8 pF VIN = 0V
COut Output Capacitance 8 pF VOut = 0V
* These parameters are sampled and not 100% tested.
PRELIMINARY (March, 2000, Version 0.0) 4 AMIC Technology, Inc.
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Read Mode AC Characteristics (Ta = 0°C to 70°C, VCC = 5V ± 10%, VPP = VCC)
A276308A
Symbol Parameter
tCYC Cycle Time 55 70 90 ns
tAA Address Access Time 55 70 90 ns
tCE Chip Enable Access Time 55 70 90 ns
tOE Output Enable Access Time 30 35 40 ns
tOH
tHZ Output High Z Delay 20 20 25 ns
Read Mode Switching Waveforms
Output Hold after Address, CE or
OE , whichever Occurred First
55ns 70ns 90ns
Min. Max. Min. Max. Min. Max.
0 0 0 ns
tCYC
ADDRESS
Address Valid
Unit
CE
tCE
OE / VPP
tHZ
tOE
tAA
OUTPUT
PRELIMINARY (March, 2000, Version 0.0) 5 AMIC Technology, Inc.
Valid
Output
tOH
High-Z
Page 7
AC Measurement Conditions
for 55 ns • Input Rise and Fall Times ≤ 10 ns
‚ Input Pulse Voltage: 0V to 3Volt
ƒ Input and Output Timing Ref. Voltage: 1.5Volt
3.0V
A276308A
1.5V 1.5V
0V
INPUT OUTPUT
for 70/90 ns • Input Rise and Fall Times ≤ 10 ns
‚ Input Pulse Voltage: 0.4V to 2.4Volt
ƒ Input and Output Timing Ref. Voltage: 0.8V to 2.0Volt
2.4V
2.0V 2.0V
0.4V
INPUT OUTPUT
AC Testing Load Circuit
TEST
POINTS
TEST
POINTS
1.3V
0.8V0.8V
1N914
3.3K
Ω
DEVICE
UNDER
TEST
CL = 30pF or 100pF
OUT
CL = 30pF for 55 ns
CL = 100pF for 70/90 ns
CL includes JIG capacitance
PRELIMINARY (March, 2000, Version 0.0) 6 AMIC Technology, Inc.
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A276308A
Programming and Program Verify
The programming flowchart is shown in Page 10.
The A276308A is shipped with all bits being set to "1".
Programming causes relevant bits to be changed to "0".
The programming mode is started by setting VCC to
6.25V, OE /VPP to +12.75V and CE is at VIL. Data to
be programmed can be directly input in the 8 bit format
through the data bus.
The write programming algorithm reduces programming
time by using 100µs pulse followed by a byte verification
to determine whether the byte has been successfully
programmed. If the data does not pass the verification,
an additional pulse programming is applied for a
maximum of 25 pulses. On completion of 1 byte
programming and, The verified address is incremented.
After the final address is completed, all bytes are verified
again with VCC = 5.0 Volt.
Program Inhibit
This mode is used to program one of multiple A276308A
whose VCC, address bus and data bus are connected in
parallel. When programming is performed, other
A276308A can be inhibited from being programmed by
setting their CE pins to VIH and OE /VPP pins to
+12.75V.
Programming Mode DC Characteristics (Ta = 0°C to 70°C, VCC = 6.25V ± 0.25V, VPP = 12.75V ± 0.25V)
Symbol Parameter Min. Max. Unit Test Conditions
VOH Output High Voltage 2.4 V
VOL Output Low Voltage 0.4 V IOL = 2.1mA
VIH Input High Voltage 2.0 VCC + 0.5 V
IOH = -400µA
VIL Input Low Voltage -0.5 0.8 V
ILI Input Leakage Current -1 +1
ICC VCC Current During Program 50 mA
IPP VPP Current During Program 50 mA
VID A9 Auto Select Voltage 11.5 12.5 V A9 = VID
VCC1 Programming Supply Voltage 6.0 6.5 V
VPP1 Programming Voltage 12.5 13 V
Note: VCC must be applied simultaneously or before VPP and removed simultaneously or after VPP.
µA
VCC = max. Vin = 0V to VCC
CE = VIL
PRELIMINARY (March, 2000, Version 0.0) 7 AMIC Technology, Inc.
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A276308A
Programming Mode AC Characteristics (Ta = 0°C to 70°C, VCC= 6.25V ± 0.25V, VPP = 12.75V ± 0.25V)
Symbol Parameter Min. Max. Unit
tAS Address Valid to Program Low 2
tDS Input Valid to Program Low 2
tVPS VPP Set up Time 2
tVCS VCC Set up Time 2
tPW Program Pulse Width 95 105
tDH Data Hold Time 2
tVR
tDV
tDFP Chip Enable to Output Float Delay 130 ns
tAH Address Hold Time 0 ns
OE / VPP Recovery Time
Data Valid from CE
2
100 ns
µs
µs
µs
µs
µs
µs
µs
PRELIMINARY (March, 2000, Version 0.0) 8 AMIC Technology, Inc.
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Programming and Verify Mode AC Waveforms
PROGRAM VERIFY
PROGRAM
VIH
A276308A
ADDRESS
DATA
OE / VPP
VCC
CE
VIL
VCC
VCC
VIH
VALID
tAS
Hi-Z
DATA IN DATA OUT
tDS
tDH
tDV
VPP1
tVPS
tVPS
VCC1
tVCS
tPW
tDFP
tAH
VIL
PRELIMINARY (March, 2000, Version 0.0) 9 AMIC Technology, Inc.
tVR
Page 11
Programming Flowchart
INTERACTIVE
SECTION
A276308A
START
ADDRESS=FIRST LOCATION
VCC=6.25V
VPP=12.75V
X = 0
PROGRAM ONE 100µs PULSE
INCREMENT X
VERIFY
SECTION
INCREMENT ADDRESS
FAIL
NO
X = 25?
NO
VERIFY BYTE
PASS
LAST ADDRESS
YES
VCC=VPP=5.0V
VERIFY ALL
BYTES ?
PASS
DEVICE PASSED
FAIL
YES
VERIFY BYTE
DEVICE FAILED
FAIL
PASS
PRELIMINARY (March, 2000, Version 0.0) 10 AMIC Technology, Inc.
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Ordering Information
A276308A
Part No. Access Time (ns)
A276308A-55 55 30 100 28Pin DIP
A276308AL-55 55 30 100 32Pin PLCC
A276308A-70 70 30 100 28Pin DIP
A276308AL-70 70 30 100 32Pin PLCC
A276308A-90 90 30 100 28Pin DIP
A276308AL-90 90 30 100 32Pin PLCC
Operating Current
Max. (mA) at 5MHz
Standby Current
Max. (µA)
Package
PRELIMINARY (March, 2000, Version 0.0) 11 AMIC Technology, Inc.
Page 13
A276308A
Package Information
P-DIP 28L Outline Dimensions unit: inches/mm
D
28
E1
15
1
S
AL
A2
B
B1
Symbol
14
A1
Base Plane
Seating Plane
e
α
Dimensions in inches Dimensions in mm
E
C
eA
Min Nom Max Min Nom Max
A - - 0.210 - - 5.33
A1 0.010 - - 0.25 - A2 0.150 0.155 0.160 3.81 3.94 4.06
B 0.016 0.018 0.022 0.41 0.46 0.56
B1 0.058 0.060 0.064 1.47 1.52 1.63
C 0.008 0.010 0.014 0.20 0.25 0.36
D - 1.460 1.470 - 37.08 37.34
E 0.590 0.600 0.610 14.99 15.24 15.49
E1 0.540 0.545 0.550 13.72 13.84 13.97
e 0.090 0.100 0.110 2.29 2.54 2.79
L 0.120 0.130 0.140 3.05 3.30 3.56
α
0° - 15° 0° - 15°
eA 0.630 0.650 0.670 16.00 16.51 17.02
S - - 0.090 - - 2.29
Notes:
1. The maximum value of dimension D includes end flash.
2. Dimension E1 does not include resin fins.
3. Dimension S includes end flash.
PRELIMINARY (March, 2000, Version 0.0) 12 AMIC Technology, Inc.
Page 14
A276308A
Package Information
PLCC 32L Outline Dimension unit: inches/mm
HD
D
13
5
14
20
21
A
b
e
b1
GD
Symbol
A1 A2
y
D
Dimensions in inches Dimensions in mm
4
1
E
HE
32
30
29
c
L
θ
GE
Min Nom Max Min Nom Max
A - - 0.134 - - 3.40
A1 0.0185 - - 0.47 - A2 0.105 0.110 0.115 2.67 2.80 2.93
b1 0.026 0.028 0.032 0.66 0.71 0.81
b 0.016 0.018 0.021 0.41 0.46 0.54
C 0.008 0.010 0.014 0.20 0.254 0.35
D 0.547 0.550 0.553 13.89 13.97 14.05
E 0.447 0.450 0.453 11.35 11.43 11.51
e 0.044 0.050 0.056 1.12 1.27 1.42
GD 0.490 0.510 0.530 12.45 12.95 13.46
GE 0.390 0.410 0.430 9.91 10.41 10.92
HD 0.585 0.590 0.595 14.86 14.99 15.11
HE 0.485 0.490 0.495 12.32 12.45 12.57
L 0.075 0.090 0.095 1.91 2.29 2.41
y - - 0.003 - - 0.075
θ 0° - 10° 0° - 10°
Notes:
1. Dimensions D and E do not include resin fins.
2. Dimensions GD & GE are for PC Board surface mount pad pitch
design reference only.
PRELIMINARY (March, 2000, Version 0.0) 13 AMIC Technology, Inc.
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