Document
A276308
Preliminary
Document Title 64K X 8 OTP CMOS EPROM Revision History
Rev. No.
0.0 0.1
64K X 8 OTP CMOS EPROM
History
Initial issue Change program verify mode VCC from 6.25V to VCC
Issue Date
June 17, 1998 December 16, 1998
Remark
Preliminary
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PRELIMINARY
(December, 1998, Version 0.1)
AMIC Technology, Inc.
A276308
Preliminary
Features
n n n n 65,536 X 8 bit organization Programming voltage: 12.75V Access time: 55/70/90 ns (max.) Current: Operating: 30mA (max.) at 5MHz Standby: 100µA (max.) n All inputs and outputs are directly TTL-compatible n Available in 28-pin DIP/SOP and 32-PLCC packages
64K X 8 OTP CMOS EPROM
General Description
The A276308 chip is a high-performance 524,288 bit one-time programmable read only memory (OTP EPROM) organized as 64K by 8 bits. The A276308 requires only 5V power supply in normal read mode operation and any input signals are TTL levels. The A276308 is available in industry standard 28 pin dual-inline and 32 lead PLCC packages.
Pin Configurations
n DIP / SOP
A7
n PLCC
VCC A12 A15 A14 31 A13 30 29 28 27 26 NC 1
A15
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1 2 3 4 5 6
28 27 26 25 24 23
VCC A14 A13 A8 A9 A11 OE / VPP A10 CE I/O7 I/O6 I/O5 I/O4 I/O3 A6 A5 A4 A3 A2 A1 A0 NC I/O0 5 6 7 8 9 10 11 12 13
A12 A7 A6 A5 A4 A3 A2 A1 A0 I/O0 I/O1 I/O2 GND
32
4
3
2
A8 A9 A11 NC OE / VPP A10 CE I/O7 I/O6
A276308
7 8 9 10 11 12 13 14
22 21 20 19 18 17 16 15
A276308L
25 24 23 22 21
14
15
16
17
18
19 I/O4
GND
I/O1
I/O2
I/O3
PRELIMINARY
(December, 1998, Version 0.1)
1
AMIC Technology, Inc.
I/O5
NC
20
A276308
Pin Configurations
Pin Name A0-A15 I/O7-I/O0
CE OE / VPP
Function Address Inputs Data Inputs / Outputs Chip Enable Output Enable / Program Power Supply Power Supply Ground No Internal Connection
VCC GND NC
Operating Modes and Truth Table
Mode
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CE
OE / VPP
A0 X X X X X X VIL VIH VIL
A1 X X X X X X VIL VIL VIH
A9 X X X X X X VID VID VID
VCC VCC VCC VCC 6.25V VCC 6.25V VCC VCC VCC
I/O7-I/O0 Data Out Hi-Z Hi-Z Data In Data Out Hi-Z 37H 3DH 7FH
Read Output Disable Standby Program Program Verify Program Inhibit Manufacturer Code(3) Device Code
(3)
VIL VIL VIH VIL VIL VIH VIL VIL
(3)
VIL VIH X 12.75V VIL 12.75V VIL VIL VIL
Continuation Code
VIL
Notes: 1. X = Either VIH or VIL. 2. VID = 12V ± 0.5V. 3. A2 ~ A8 = A10 ~ A15 = VIL (For auto identification)
PRELIMINARY
(December, 1998, Version 0.1)
2
AMIC Technology, Inc.
A276308
Functional Description
Read Mode The A276308 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 A276308 has a standby mode which reduces the active current from 30mA to 100µA. The A276308 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 . 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 A276308. 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 3DH and 7FH respectively. All identifiers for these codes will possess odd parity, with MSB (IO7) defined the parity bit.
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Absolute Maximum Ratings*
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)
*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 an.