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27C256-10EP Datasheet(PDF) 2 Page - Microchip Technology

Part # 27C256-10EP
Description  256K (32K x 8) CMOS EPROM
Download  12 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

27C256-10EP Datasheet(HTML) 2 Page - Microchip Technology

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27C256
DS11001L-page 2
© 1996 Microchip Technology Inc.
1.0
ELECTRICAL CHARACTERISTICS
1.1
Maximum Ratings*
VCC and input voltages w.r.t. VSS ........ -0.6V to +7.25V
VPP voltage w.r.t. VSS during
programming ....................................... -0.6V to +14.0V
Voltage on A9 w.r.t. VSS ...................... -0.6V to +13.5V
Output voltage w.r.t. VSS ............... -0.6V to VCC +1.0V
Storage temperature .......................... -65˚C to +150˚C
Ambient temp. with power applied ..... -65˚C to +125˚C
*Notice: Stresses above those listed under “Maximum Ratings”
may cause permanent damage to the device. This is a stress rat-
ing only and functional operation of the device at those or any
other conditions above those indicated in the operation listings of
this specification is not implied. Exposure to maximum rating con-
ditions for extended periods may affect device reliability.
TABLE 1-1:
PIN FUNCTION TABLE
Name
Function
A0-A14
Address Inputs
CE
Chip Enable
OE
Output Enable
VPP
Programming Voltage
O0 - O7
Data Output
VCC
+5V Power Supply
VSS
Ground
NC
No Connection; No Internal Connec-
tion
NU
Not Used; No External Connection Is
Allowed
TABLE 1-2:
READ OPERATION DC CHARACTERISTICS
VCC = +5V (
±10%)
Commercial:
Tamb =
0˚C to +70˚C
Industrial:
Tamb = -40˚C to +85˚C
Extended (Automotive):
Tamb = -40
°C to +125°C
Parameter
Part*
Status
Symbol
Min.
Max.
Units
Conditions
Input Voltages
all
Logic "1"
Logic "0"
VIH
VIL
2.0
-0.5
VCC+1
0.8
V
V
Input Leakage
all
ILI
-10
10
µAVIN = 0 to VCC
Output Voltages
all
Logic "1"
Logic "0"
VOH
VOL
2.4
0.45
V
V
IOH = -400
µA
IOL = 2.1 mA
Output Leakage
all
ILO
-10
10
µAVOUT = 0V to VCC
Input Capacitance
all
CIN
6
pF
VIN = 0V; Tamb = 25
°C;
f = 1 MHz
Output Capacitance
all
COUT
—12
pF
VOUT = 0V; Tamb = 25
°C;
f = 1 MHz
Power Supply Current,
Active
C
I,E
TTL input
TTL input
ICC1
ICC2
20
25
mA
mA
VCC = 5.5V; VPP = VCC
f = 1 MHz;
OE = CE = VIL;
IOUT = 0 mA;
VIL = -0.1 to 0.8V;
VIH = 2.0 to VCC;
Note 1
Power Supply Current,
Standby
C
I, E
all
TTL input
TTL input
CMOS input
ICC(S)—
2
3
100
mA
mA
µACE = VCC ± 0.2V
IPP Read Current
VPP Read Voltage
all
all
Read Mode
Read Mode
IPP
VPP
VCC-0.7
100
VCC
µA
V
VPP = 5.5V
* Parts: C=Commercial Temperature Range; I, E=Industrial and Extended Temperature Ranges
Note 1: Typical active current increases .75 mA per MHz up to operating frequency for all temperature ranges.


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