AT27C010/L
Features
∙Fast Read Access Time - 45 ns
∙Low Power CMOS Operation
100 μA max. Standby
25 mA max. Active at 5 MHz (AT27C010L)
∙JEDEC Standard Packages 32-Lead 600-mil PDIP 32-Lead PLCC
32-Lead TSOP
∙5V ± 10% Supply
∙High Reliability CMOS Technology 2000V ESD Protection
200 mA Latchup Immunity
∙Rapid™ Programming Algorithm - 100 μs/byte (typical)
∙CMOS and TTL Compatible Inputs and Outputs
∙Integrated Product Identification Code
∙Commercial and Industrial Temperature Ranges35 mA max. Active at 5 MHz (AT27C010)
Description
The AT27C010/L is a low-power, high performance 1,048,576 bit one-time programmable read only memory (OTP EPROM) organized as 128K by 8 bits. They require only one 5V power supply in normal read mode operation. Any byte can be accessed in less than 45 ns, eliminating the need for speed reducing WAIT states on high performance microprocessor systems.
Two power versions are offered. In read mode, the AT27C010 typically consumes 25 mA while the AT27C010L requires only 8 mA. Standby mode supply current for both
parts is typically less than 10 μA.
(continued)
PDIP Top View
Pin Configurations
Pin Name |
Function |
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A0 - A16 |
Addresses |
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O0 - O7 |
Outputs |
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CE |
Chip Enable |
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OE |
Output Enable |
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PGM |
Program Strobe |
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NC |
No Connect |
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PLCC Top View
TSOP Top View
Type 1
1 Megabit
(128K x 8) OTP
CMOS EPROM
0321I
3-153
Description (Continued)
The AT27C010/L in available in a choice of industry standard JEDEC-approved one-time programmable (OTP) plastic PDIP, PLCC, and TSOP packages. All devices feature two line control (CE, OE) to give designers the flexibility to prevent bus contention.
With 128K byte storage capability, the AT27C010/L allows firmware to be stored reliably and to be accessed by the system without the delays of mass storage media.
Atmel’s 27C010/L have 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.
System Considerations
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.
3-154 AT27C010/L
AT27C010/L
Block Diagram |
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Absolute Maximum Ratings* |
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Temperature Under Bias |
-55°C to +125°C |
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Storage Temperature |
-65°C to +150°C |
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Voltage on Any Pin with |
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(1) |
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.........................Respect to Ground |
-2.0V to +7.0V |
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Voltage on A9 with |
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(1) |
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Respect to Ground |
- 2.0V to +14.0V |
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VPP Supply Voltage with |
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(1) |
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Respect to Ground....................... |
- 2.0V to +14.0V |
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*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 overshoot to +7.0V for pulses of less than 20 ns.
Operating Modes
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Mode \ Pin |
CE |
OE |
PGM |
Ai |
VPP |
Outputs |
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Read |
VIL |
VIL |
X (1) |
Ai |
X |
DOUT |
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Output Disable |
X |
VIH |
X |
X |
X |
High Z |
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Standby |
VIH |
X |
X |
X |
X |
High Z |
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Rapid Program (2) |
VIL |
VIH |
VIL |
Ai |
VPP |
DIN |
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PGM Verify |
VIL |
VIL |
VIH |
Ai |
VPP |
DOUT |
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PGM Inhibit |
VIH |
X |
X |
X |
VPP |
High Z |
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Product Identification (4) |
VIL |
VIL |
X |
A9 = VH (3) |
X |
Identification |
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A0 = VIH or VIL |
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Code |
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A1 - A16 = VIL |
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Notes: 1. X can be VIL or VIH. |
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4. Two identifier bytes may be selected. All Ai inputs |
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2. Refer to Programming characteristics. |
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are held low (VIL), except A9 which is set to VH and A0 |
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3. VH = 12.0 ± 0.5V. |
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which is toggled low (VIL) to select the Manufacturer’s Identi- |
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fication byte and high (VIH) to select the Device Code byte. |
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3-155 |
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