ATMEL AT27BV512-90TI, AT27BV512-90TC, AT27BV512-90RI, AT27BV512-90RC, AT27BV512-90JI Datasheet

AT27BV512

Features

∙Fast Read Access Time - 90 ns

∙Dual Voltage Range Operation

Unregulated Battery Power Supply Range, 2.7V to 3.6V

±

∙Pin Compatible with JEDEC Standard AT27C512

∙Low Power CMOS Operationor Standard 5V 10% Supply Range

20 μA max. (less than 1μA typical) Standby for VCC = 3.6V

∙JEDEC Standard Surface Mount Packages 32-Lead PLCC

28-Lead 330-mil SOIC

28-Lead TSOP

∙High Reliability CMOS Technology 2,000V ESD Protection

200 mA Latchup Immunity

∙Rapid™ Programming Algorithm - 100 μs/byte (typical)

∙CMOS and TTL Compatible Inputs and Outputs JEDEC Standard for LVTTL and LVBO

∙Integrated Product Identification Code

∙Commercial and Industrial Temperature Ranges29 mW max. Active at 5 MHz for VCC = 3.6V

Description

The AT27BV512 is a high performance, low power, low voltage 524,288 bit one-time programmable read only memory (OTP EPROM) organized as 64K by 8 bits. It requires only one supply in the range of 2.7V to 3.6V in normal read mode operation, making it ideal for fast, portable systems using either regulated or unregulated battery power.

Atmel’s innovative design techniques provide fast speeds that rival 5V parts while keeping the low power consumption of a 3V supply. At VCC = 2.7V, any byte can be accessed in less than 90 ns. With a typical power consumption of only 18 mW at 5 MHz and VCC = 3V, the AT27BV512 consumes less than one fifth the power of a

standard 5V EPROM.

(continued)

Pin Configurations				SOIC Top View
	Pin Name		Function
	A0 - A15		Addresses
	O0 - O7		Outputs
	CE		Chip Enable
	OE/VPP		Output Enable
	NC		No Connect

PLCC Top View

TSOP Top View

Type 1

Note: PLCC Package Pins 1 and 17 are DON’T CONNECT.

512K (64K x 8) Unregulated

Battery-Voltage™

High Speed OTP

CMOS EPROM

AT27BV512

0602A

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Description (Continued)

Standby mode supply current is typically less than 1 μA at 3V. The AT27BV512 simplifies system design and stretches battery lifetime even further by eliminating the need for power supply regulation.

The AT27BV512 is available in industry standard JEDECapproved one-time programmable (OTP) plastic PLCC, SOIC, and TSOP packages. All devices feature two-line control (CE, OE) to give designers the flexibility to prevent bus contention.

The AT27BV512 operating with VCC at 3.0V produces TTL level outputs that are compatible with standard TTL logic devices operating at VCC = 5.0V. At VCC = 2.7V, the part is compatible with JEDEC approved low voltage battery operation (LVBO) interface specifications. The device is also capable of standard 5-volt operation making it ideally suited for dual supply range systems or card products that are pluggable in both 3-volt and 5-volt hosts.

Atmel’s AT27BV512 has 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. The AT27BV512 programs exactly the same way as a standard 5V AT27C512R and uses the same programming equipment.

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.

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AT27BV512

Block Diagram

Absolute Maximum Ratings*

Temperature Under Bias

-40°C to +85°C

Storage Temperature

-65°C to +125°C

Voltage on Any Pin with

- 2.0V to +7.0V (1)

.........................Respect to Ground

Voltage on A9 with

- 2.0V to +14.0V (1)

Respect to Ground

VPP Supply Voltage with

- 2.0V to +14.0V (1)

Respect to Ground.......................

*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 be exceeded if certain precautions are observed (consult application notes) and which may overshoot to +7.0V for pulses of less than 20 ns.

Operating Modes

Mode \ Pin	CE		OE/VPP		Ai	VCC	Outputs
Read (2)	VIL		VIL		Ai	VCC (2)	DOUT
Output Disable (2)	VIL		VIH		X (1)	VCC (2)	High Z
Standby (2)	VIH		X		X	VCC (2)	High Z
Rapid Program (3)	VIL		VPP		Ai	VCC (3)	DIN
PGM Verify (3)	VIL		VIL		Ai	VCC (3)	DOUT
PGM Inhibit (3)	VIH		VPP		X	VCC (3)	High Z
Product Identification (3, 5)	VIL		VIL		A9 = VH (4)	VCC (3)	Identification
					A0 = VIH or VIL
					A1 - A15 = VIL		Code
Notes: 1. X can be VIL or VIH.					4. VH = 12.0 ± 0.5V.
2. Read, output disable, and standby modes require,					5. Two identifier bytes may be selected. All Ai inputs are held
2.7V ≤ VCC ≤ 3.6V, or 4.5V ≤ VCC ≤ 5.5V.					low (VIL), except A9 which is set to VH and A0 which is tog-
3. Refer to Programming Characteristics.					gled low (VIL) to select the Manufacturer’s Identification byte
Programming modes require VCC = 6.5V.					and high (VIH) to select the Device Code byte.

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