AT27C2048_07 Datasheet, PDF (3/14 Pages) ATMEL Corporation – 2-Megabit (128K x 16) OTP EPROM AT27C2048

AT27C2048
3. 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
datasheet 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_CC 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 con-
nected between the V_CC and Ground terminals. This capacitor should be positioned as close as
possible to the point where the power supply is connected to the array.
4. Block Diagram
VCC
GND
VPP
OE
CE
A0 - A17
ADDRESS
INPUTS
OE, CE AND
PROGRAM LOGIC
Y DECODER
X DECODER
DATA OUTPUTS
O0 - O15
OUTPUT
BUFFERS
Y-GATING
CELL MATRIX
IDENTIFICATION
5. Absolute Maximum Ratings*
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⁽¹⁾
Voltage on A9 with
Respect to Ground ......................................-2.0V to +14.0V⁽¹⁾
V_PP Supply Voltage with
Respect to Ground .......................................-2.0V to +14.0V⁽¹⁾
*NOTICE:
Stresses beyond those listed under “Absolute Maxi-
mum 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 condi-
tions beyond those indicated in the operational sec-
tions of this specification is not implied. Exposure to
absolute maximum rating conditions for extended
periods may affect device reliability.
Note: 1. Maximum voltage is -0.6V DC which may undershoot to -2.0V for pulses of less than 20 ns. Maximum output pin voltage is
V_CC + 0.75V DC which may overshoot to +7.0V for pulses of less than 20 ns.
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0632F–EPROM–12/07