ATMEL AT27C512R-90TI, AT27C512R-90TC, AT27C512R-90RI, AT27C512R-90RC, AT27C512R-90PI Datasheet
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AT27C512R
512K (64K x 8)
OTP
CMOS
EPROM
Features
0015H
Fast Read Access Ti me - 45 ns
•
Low Power CMOS Operation
•
100 µA max. Standby
20 mA max. Active at 5 MHz
JEDEC Standard Packages
•
28-Lead 600-mil PDIP
32-Lead PLCC
28-Lead TSOP and SOIC
5V ± 10% Supply
•
High Reliabili ty C MOS Te ch nology
•
2,000V ESD Protection
200 mA Latchup Imm un ity
RapidProgramming Algorithm - 100 µs/byte (typical)
•
CMOS and TTL Compatible Inputs and Outputs
•
Integrated Produc t Ide nti fication Code
•
Commercial and Industrial Temperature Ranges
•
Description
The AT27C512R is a low-power, high performance 524,288 bit one-time programmable read only memory (OTP EPROM) organized 64K by 8 bits. It requires 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.
Atmel’s scaled CMOS technology provides high speed, lower active power consumption, and significantly faster programming. Power consumption is ty pically only
8 mA in Active Mode and less than 10 µA in Standby.
(continued)
AT27C512R
Pin Configurations
Pin Name Function
A0 - A15 Addresses
O0 - O7 Outputs
CE Chip Enable
OE /V
NC No Connect
Output Enable/V
PP
PLCC Top View
Note: PLCC Package Pins 1 and
17 are DON’T CONNECT.
PDIP, SOIC Top View
PP
TSOP Top View
Type 1
3-135
Description (Continued)
The AT27C512R is available in a choice of industry standard JEDEC-approved one-time programmable (OTP)
plastic PDIP, PLCC, SOIC, and TSOP packages. All devices feature two-line control (
the flexibility to prevent bus contention.
With 64K byte storage capability, the AT27C512R allows
firmware to be stored reliably and to be accessed by the
system without the delays of mass storage media.
Atmel’s 27C512R has additional features to ensure high
quality and efficient production use. The Rapid
ming 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.
CE, OE) to give designers
Program-
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 V
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
and Ground terminals. This capacitor should be posi-
V
CC
tioned as close as possible to the point where the power
supply is connected to the array.
and Ground terminals of
CC
3-136 AT27C512R
AT27C512R
Block Diagram
Absolute Maximum Ra ti ngs *
Temperature Under Bias ................ -55°C to +125°C
Storage Temperature...................... -65°C to +150°C
Voltage on Any Pin with
Respect to Ground.........................-2.0V to +7.0V
Voltage on A9 with
Respect to Ground ......................-2.0V to +14.0V
VPP Supply Voltage with
Respect to Ground.......................-2.0V to +14.0V
*NOTICE: Stresses beyond those listed unde r “Absolu te Maxi-
mum Ratings” may cause permanent da ma ge to th e de vice .
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 V
shoot to +7.0V for pulses of less than 20 ns.
+ 0.75V dc wh ich may over-
CC
(1)
(1)
(1)
Operating Modes
Mode \ Pin
Read V
Output Disable V
Standby V
Rapid Program
PGM Inhibit V
Product Identification
Notes: 1. X can be VIL or VIH.
2. Refer to Programming Characteristics.
3. VH = 12.0 ± 0.5V.
(2)
(4)
CE OE/V
X
V
V
V
V
PP
PP
V
IL
IL
IH
V
IL
IH
V
IL
PP
IL
IH
(1)
Ai
Ai D
(1)
X
X High Z
Ai D
(1)
X
A9 = VH
IL
A0 = VIH or VIL
A1 - A15 = V
4. Two identifier by tes may be selec ted. All Ai in pu ts are held
low (V
gled low (V
and high (V
), except A9 which is set to VH and A0 which is tog-
IL
) to select the Manuf ac tu rer’s Identifi ca ti on byte
IL
) to select the Dev ice Code byte.
IH
(3)
IL
Outputs
OUT
High Z
IN
High Z
Identification Code
3-137
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