0.1 Change Program Verify VCC to 6.25V March 14, 2001
1.0 Final spec release December 17, 2001
(December, 2001, Version 1.0) AMIC Technology, Inc.
Page 2
A276308A
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
nDIP nPLCC
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 dual-inline and 32 lead PLCC packages.
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
1415
28
27
26
25
24
23
A276308A
22
21
20
19
18
17
16
VCC
A14
A13
A8
A9
A11
OE / VPP
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
NC
I/O0
A7
A12
A15
NC
VCC
A14
A13
1
2
3
4
A6
A5
A4
A3
A2
A1
A0
5
6
7
8
9
10
11
12
13
A276308AL
141615
I/O2
I/O1
GND
17
NC
32
31
30
29
28
27
26
25
24
23
22
21
18
19
20
I/O3
I/O5
I/O4
A8
A9
A11
NC
OE / VPP
A10
CE
I/O7
I/O6
(December, 2001, Version 1.0) 1 AMIC Technology, Inc.
Page 3
A276308A
CE
OE
CE OE
Pin Configurations
Pin Name Function
A0-A15 Address Inputs
I/O7-I/O0Data Inputs / Outputs
/ VPP
Chip Enable
Output Enable / Program Power Supply
VCC Power Supply
GND Ground
NC No Internal Connection
Operating Modes and Truth Table
Mode
/ VPP
Read VILVILX X X VCC Data Out
Output Disable VILVIHX X X VCC Hi-Z
Standby VIHX X X X VCC Hi-Z
Program VIL12.75V X X X 6.25V Data In
A0 A1 A9 VCC I/O7-I/O0
Program Verify VILVILX X X 6.25V Data Out
Program Inhibit VIH12.75V X X X 6.25V Hi-Z
Manufacturer Code
Device Code
Continuation Code
(3)
VILVILVILVILVIDVCC 37H
(3)
VILVILVIHVILVIDVCC 2CH
(3)
VILVILVILVIHVIDVCC 7FH
Notes:
1. X = Either VIH or VIL.
2. VID = 12V ± 0.5V.
3. A2 ~ A8 = A10 ~ A15 = VIL (For auto identification)
(December, 2001, Version 1.0) 2 AMIC Technology, Inc.
Page 4
A276308A
Functional Description
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
Output Voltage (VO) . . . . . . . . . . . . -0.6V to 7.0V (Note 1)
) . . . . . . . . . .
STG
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.
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.
(December, 2001, Version 1.0) 3 AMIC Technology, Inc.
Page 5
A276308A
Read Mode DC Electrical Characteristics (Ta = 0°C to 70°C, VCC = 5V ± 10%, VPP = VCC)
Symbol Parameter Min. Max. Unit Conditions
VOHOutput High Voltage 2.4 V
VOLOutput Low Voltage 0.4 V IOL = 2.1mA
VIHInput High Voltage 2.0 VCC + 0.5 V
VILInput Low Voltage -0.5 0.8 V
ILIInput Leakage Current -1 +1
ILOOutput Leakage Current -1 +1
ICC
ISBVCC Standby Current (TTL) 1 mA
ISB1VCC Standby Current (CMOS) 100
IPPVPP Current During Read 10
VCC Read Operating Current
30
µA
µA
mA
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
IIDA9 Auto Select Current 100
µA
A9 = VID, VCC = max.
Capacitance (TA = 25°C, f = 1.0MHz)
Symbol Parameter Min. Max. Unit Conditions
CINInput Capacitance 8 pF VIN = 0V
COutOutput Capacitance 8 pF VOut = 0V
* These parameters are sampled and not 100% tested.
(December, 2001, Version 1.0) 4 AMIC Technology, Inc.
Page 6
A276308A
Read Mode AC Characteristics (Ta = 0°C to 70°C, VCC = 5V ± 10%, VPP = VCC)
Symbol Parameter
tCYCCycle Time 55 70 90 ns
tAAAddress Access Time 55 70 90 ns
tCEChip Enable Access Time 55 70 90 ns
tOEOutput Enable Access Time 30 35 40 ns
tOH
tHZOutput 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
t
tAA
OUTPUT
(December, 2001, Version 1.0) 5 AMIC Technology, Inc.
Valid
Output
OH
High-Z
Page 7
A276308A
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
1.5V1.5V
TEST
POINTS
0V
INPUTOUTPUT
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
2.0V2.0V
TEST
POINTS
0.4V
INPUTOUTPUT
AC Testing Load Circuit
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
(December, 2001, Version 1.0) 6 AMIC Technology, Inc.
Page 8
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
VOHOutput High Voltage 2.4 V
VOLOutput Low Voltage 0.4 V IOL = 2.1mA
VIHInput High Voltage 2.0 VCC + 0.5 V
VILInput Low Voltage -0.5 0.8 V
IOH = -400µA
ILIInput Leakage Current -1 +1
ICCVCC Current During Program 50 mA
IPPVPP Current During Program 50 mA
VIDA9 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
(December, 2001, Version 1.0) 7 AMIC Technology, Inc.
Page 9
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
tASAddress Valid to Program Low 2
tDSInput Valid to Program Low 2
tVPSVPP Set up Time 2
tVCSVCC Set up Time 2
tPWProgram Pulse Width 95 105
tDHData Hold Time 2
tVR
tDV
tDFPChip Enable to Output Float Delay 130 ns
tAHAddress Hold Time 0 ns
OE / VPP Recovery Time
Data Valid from CE
2
100 ns
µs
µs
µs
µs
µs
µs
µs
(December, 2001, Version 1.0) 8 AMIC Technology, Inc.
Page 10
A276308A
Programming and Verify Mode AC Waveforms
ADDRESS
DATA
OE / VPP
VCC
VIH
VIL
VCC
VCC
PROGRAM
PROGRAM VERIFY
VALID
tAS
Hi-Z
DATA INDATA OUT
tDS
tDH
tDV
VPP1
tVPS
tVPS
VCC1
tVCS
tDFP
tAH
tPW
CE
VIH
VIL
tVR
(December, 2001, Version 1.0) 9 AMIC Technology, Inc.
Page 11
A276308A
Programming Flowchart
START
ADDRESS=FIRST LOCATION
VCC=6.25V
INTERACTIVE
SECTION
PROGRAM ONE 100µs PULSE
VPP=12.75V
X = 0
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
(December, 2001, Version 1.0) 10 AMIC Technology, Inc.
Page 12
A276308A
Ordering Information
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
(December, 2001, Version 1.0) 11 AMIC Technology, Inc.