AMICC A278308A

A278308A
256K X 8 OTP CMOS EPROM
Document Title
256K X 8 OTP CMOS EPROM
Revision History
History
Issue Date
Remark
0.0
Initial issue
September 29, 2000
Preliminary
0.1
Change Program Verify VCC to 6.25V
March 14, 2001
1.0
Final version release
October 7, 2003
Rev. No.
(October, 2003, Version 1.0)
Final
AMIC Technology, Corp.
A278308A
256K X 8 OTP CMOS EPROM
Features
All inputs and outputs are directly TTL-compatible
Available in 32-pin DIP and 32-pin PLCC packages
262,144 X 8 bit organization
Programming voltage: 12.75V
Access time: 55/70 ns (max.)
Current: Operating: 30mA (max.) at 5MHz
Standby:
100µA (max.)
General Description
input signals are TTL levels. The A278308A is available in
industry standard 32 pin dual-in-line and 32 pin PLCC
packages.
The A278308A chip is a high-performance 2,097,152 bit
one-time programmable read only memory (OTP EPROM)
organized as 256K by 8 bits. The A278308A requires only
5V power supply in normal read mode operation and any
Pin Configurations
28
A13
25
A11
A11
A3
9
24
OE
A2
10
24
OE
23
A10
A1
11
23
A10
22
CE
A0
12
22
CE
I/O0
13
21
I/O7
I/O0
13
20
I/O6
I/O1
14
19
I/O5
I/O2
15
18
I/O4
GND
16
17
I/O3
1
20
21
I/O6
12
A278308AL
19
A0
I/O7
(October, 2003, Version 1.0)
A9
25
I/O5
11
26
18
A1
8
A9
17
10
A8
A4
26
I/O3
A2
27
I/O4
9
7
A8
16
A3
A13
A5
27
GND
8
A14
28
15
A4
29
6
14
7
5
A6
I/O2
A5
A7
I/O1
6
A278308A
A6
A17
5
PGM
A14
A7
30
29
31
4
VCC
A17
A12
VPP
30
1
3
32
PGM
A15
A16
VCC
31
A15
32
2
2
1
A16
3
VPP
A12
PLCC
4
DIP
AMIC Technology, Corp.
A278308A
Pin Configurations
Pin Name
Function
A0-A17
Address Inputs
I/O7-I/O0
Data Inputs / Outputs
CE
Chip Enable
OE
Output Enable
PGM
Program Strobe
VPP
Program Power Supply
VCC
Power Supply
GND
Ground
Operating Modes and Truth Table
CE
OE
PGM
A0
A1
A9
VPP
VCC
I/O7-I/O0
Read
VIL
VIL
X
X
X
X
VCC
VCC
Data Out
Output Disable
VIL
VIH
X
X
X
X
VCC
VCC
Hi-Z
Standby
VIH
X
X
X
X
X
VCC
VCC
Hi-Z
Program
VIL
VIH
VIL Pulse
X
X
X
12.75V
6.25V
Data In
Program Verify
VIL
VIL
VIH
X
X
X
12.75V
6.25V
Data Out
Program Inhibit
VIH
X
X
X
X
X
12.75V
6.25V
Hi-Z
Manufacturer Code(3)
VIL
VIL
VIH
VIL
VIL
VID
VCC
VCC
37H
Device Code(3)
VIL
VIL
VIH
VIH
VIL
VID
VCC
VCC
64H
Continuation Code(3)
VIL
VIL
VIH
VIL
VIH
VID
VCC
VCC
7FH
Mode
Notes:
1. X = Either VIH or VIL.
2. VID = 12V ± 0.5V.
3. A2 ~ A8 = A10 ~ A17 = VIL (For auto identification)
(October, 2003, Version 1.0)
2
AMIC Technology, Corp.
A278308A
Functional Description
Read Mode
Auto Identify Mode
The A278308A 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 tACC - tOE.
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 A278308A.
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 64H and 7FH respectively.
All identifiers for these codes will possess odd parity,
with MSB (IO7) defined the parity bit.
Standby Mode
The A278308A has a standby mode which reduces the
active current from 30mA to 100µA. The A278308A 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*
*Comments
Ambient Operating Temperature (TA) . . . -10°C to +85°C
Storage Temperature Plastic Package (TSTG) . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -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)
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.
(October, 2003, Version 1.0)
3
AMIC Technology, Corp.
A278308A
Read Mode DC Electrical Characteristics (Ta = 0°C to 70°C, VCC = 5V ± 10%, VPP = VCC)
Symbol
Parameter
Min.
Max.
Unit
Conditions
V
IOH = -400µA
0.4
V
IOL = 2.1mA
2.0
VCC + 0.5
V
-0.5
0.8
V
Input Leakage Current
-1
+1
µA
VCC = max.
Vin = 0V to VCC
ILO
Output Leakage Current
-1
+1
µA
VCC = max.
Vout = 0V to VCC
ICC
VCC Read Operating Current
30
mA
VCC = max.
CE = VIL, OE = VIL
Iout = 0mA, at 5MHz
ISB
VCC Standby Current (TTL)
1
mA
VCC = max. CE = VIH
ISB1
VCC Standby Current (CMOS)
100
µA
VCC = max.
CE = VCC - 0.2V
IPP
VPP Current During Read
10
µA
CE = OE = VIL,
VPP = VCC
IID
A9 Auto Select Current
100
µA
A9 = VID, VCC = max.
VOH
Output High Voltage
VOL
Output Low Voltage
VIH
Input High Voltage
VIL
Input Low Voltage
ILI
2.4
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.
(October, 2003, Version 1.0)
4
AMIC Technology, Corp.
A278308A
Read Mode AC Characteristics (Ta = 0°C to 70°C, VCC = 5V ± 10%, VPP = VCC)
Symbol
55ns
Parameter
Min.
70ns
Max.
55
Min.
Unit
Max.
tCYC
Cycle Time
70
tAA
Address Access Time
55
70
ns
tCE
Chip Enable Access Time
55
70
ns
tOE
Output Enable Access Time
30
35
ns
tOH
Output Hold after Address, CE or OE , whichever
Occurred First
tHZ
Output High Z Delay
0
ns
0
ns
20
20
ns
Read Mode Switching Waveforms
tCYC
ADDRESS
Address Valid
CE
tCE
OE
tHZ
tOE
tOH
tAA
Valid
Output
OUTPUT
(October, 2003, Version 1.0)
5
High-Z
AMIC Technology, Corp.
A278308A
AC Measurement Conditions
for 55 ns
Input Rise and Fall Times ≤ 10 ns
Input Pulse Voltage: 0V to 3Volt
Input and Output Timing Ref. Voltage: 1.5Volt
3.0V
1.5V
TEST
POINTS
1.5V
0V
INPUT
for 70 ns
OUTPUT
Input Rise and Fall Times ≤ 10 ns
Input Pulse Voltage: 0.4V to 2.4Volt
Input and Output Timing Ref. Voltage: 0.8V to 2.0Volt
2.4V
2.0V
0.8V
TEST
POINTS
2.0V
0.8V
0.4V
INPUT
OUTPUT
AC Testing Load Circuit
1.3V
1N914
3.3KΩ
OUT
DEVICE
UNDER
TEST
CL = 30pF or 100pF
CL = 30pF for 55 ns
CL = 100pF for 70/90 ns
CL includes JIG capacitance
(October, 2003, Version 1.0)
6
AMIC Technology, Corp.
A278308A
Programming and Program Verify
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.
The programming flowchart is shown in Page 10.
The A278308A 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 and VPP to +12.75V, while CE and PGM are at
VIL, and OE is at VIH. Data to be programmed can be
directly input in the 8 bit format through the data bus.
Program Inhibit
This mode is used to program one of multiple A278308A
whose OE , PGM , VPP, VCC, address bus and data bus
are connected in parallel. When programming is
performed, other A278308A can be inhibited from being
programmed by setting their CE pins to VIH.
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
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
V
IOH = -400µA
0.4
V
IOL = 2.1mA
2.0
VCC + 0.5
V
-0.5
0.8
V
-1
+1
µA
VCC Current During Program
50
mA
IPP
VPP Current During Program
50
mA
VID
A9 Auto Select Voltage
11.5
12.5
V
VCC1
Programming Supply Voltage
6.0
6.5
V
VPP1
Programming Voltage
12.5
13
V
VOH
Output High Voltage
VOL
Output Low Voltage
VIH
Input High Voltage
VIL
Input Low Voltage
ILI
Input Leakage Current
ICC
2.4
VCC = max. Vin = 0V to VCC
CE = VIL
A9 = VID
Note: VCC must be applied simultaneously or before VPP and removed simultaneously or after VPP.
(October, 2003, Version 1.0)
7
AMIC Technology, Corp.
A278308A
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
µs
tDS
Input Valid to Program Low
2
µs
tVPS
VPP High to Program Low
2
µs
tVCS
VCC High to Program Low
2
µs
tCES
CE Low to Program Low
2
µs
tPW
Program Pulse Width
95
tDH
Program High to Input transition
2
µs
tOES
Input Transition to OE Low
2
µs
tOE
OE Low to Output Valid
100
ns
tOHZ
OE High to Output Hi-Z
130
ns
tAH
OE High to Address Transition
(October, 2003, Version 1.0)
0
8
105
µs
ns
AMIC Technology, Corp.
A278308A
Programming and Verify Mode AC Waveforms
PROGRAM VERIFY
PROGRAM
VIH
ADDRESS
VALID
VIL
tAS
DATA
DATA IN
tDS
DATA OUT
tDH
VPP1
VPP
VCC
tVPS
tOE
tOHZ
VCC1
VCC
VCC
tVCS
tAH
VIH
CE
VIL
tCES
tPW
VIH
PGM
VIL
tOES
VIH
OE
(October, 2003, Version 1.0)
VIL
9
AMIC Technology, Corp.
A278308A
Programming Flowchart
START
ADDRESS=FIRST LOCATION
VCC=6.25V
VPP=12.75V
INTERACTIVE
SECTION
X=0
PROGRAM ONE 100 s PULSE
INCREMENT X
YES
X = 25?
NO
FAIL
VERIFY BYTE
VERIFY BYTE
FAIL
PASS
PASS
INCREMENT ADDRESS
NO
LAST ADDRESS
YES
VCC=VPP=5.0V
VERIFY
SECTION
VERIFY ALL
BYTES ?
FAIL
DEVICE FAILED
PASS
DEVICE PASSED
(October, 2003, Version 1.0)
10
AMIC Technology, Corp.
A278308A
Ordering Information
Access Time (ns)
Operating Current
Max. (mA) at 5MHz
Standby Current
Max. (µA)
Package
A278308A-55
55
30
100
32Pin DIP
A278308AL-55
55
30
100
32Pin PLCC
A278308A-70
70
30
100
32Pin DIP
A278308AL-70
70
30
100
32Pin PLCC
Part No.
(October, 2003, Version 1.0)
11
AMIC Technology, Corp.
A278308A
Package Information
P-DIP 32L Outline Dimensions
unit: inches/mm
D
17
1
16
E
32
A1
A2
Base Plane
Seating Plane
L
A
C
E1
B
Symbol
θ
e
B1
Dimensions in inches
EA
Dimensions in mm
Min
Nom
Max
Min
Nom
Max
A
-
-
0.210
-
-
5.334
A1
0.015
-
-
0.381
-
-
A2
0.149
0.154
0.159
3.785
3.912
4.039
B
-
0.018
-
-
0.457
-
B1
-
0.050
-
-
1.270
-
C
D
1.645
0.010
1.650
1.655
41.783
0.254
41.91
42.037
E
0.537
0.542
0.547
13.64
13.767
13.894
E1
0.590
0.600
0.610
14.986
15.240
15.494
EA
0.630
0.650
0.670
16.002
16.510
17.018
e
-
0.100
-
-
2.540
-
L
0.120
0.130
0.140
3.048
3.302
3.556
θ
0°
-
15°
0°
-
15°
Notes:
1. The maximum value of dimension D includes end flash.
2. Dimension E does not include resin fins.
(October, 2003, Version 1.0)
12
AMIC Technology, Corp.
A278308A
Package Information
PLCC 32L Outline Dimension
unit: inches/mm
HD
D
13
5
4
E
1
HE
14
32
20
30
29
c
A1
b
e
L
A
A2
21
b1
D
GE
GD
y
θ
Dimensions in inches
Dimensions in mm
Symbol
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
0.54
b
0.016
0.018
0.021
0.41
0.46
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
13.46
GD
0.490
0.510
0.530
12.45
12.95
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
12.57
HE
0.485
0.490
0.495
12.32
12.45
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.
(October, 2003, Version 1.0)
13
AMIC Technology, Corp.