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AM27C256-255EI 数据表(PDF) 10 Page - Advanced Micro Devices

部件名 AM27C256-255EI
功能描述  256 Kilobit (32,768 x 8-Bit) CMOS EPROM
Download  12 Pages
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制造商  AMD [Advanced Micro Devices]
网页  http://www.amd.com
标志 AMD - Advanced Micro Devices

AM27C256-255EI 数据表(HTML) 10 Page - Advanced Micro Devices

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AMD
2-41
Am27C256
CAPACITANCE
Parameter
Parameter
Test
Symbol
Description
Conditions
Typ
Max
Typ
Max
Typ
Max
Typ
Max
Unit
CIN
Input Capacitance
VIN = 0
8
12
8
12
6
10
10
12
pF
COUT
Output Capacitance
VOUT = 0
8
12
8
12
8
10
12
14
pF
Notes:
1. This parameter is only sampled and not 100% tested.
2. TA = +25
°C, f = 1 MHz.
CDV028
PL 032
PD 028
TS 032
SWITCHING CHARACTERISTICS over operating range unless otherwise specified
(Notes 1, 3 and 4)
Parameter
Test
JEDEC
Standard
Description
Conditions
-55
-70
-90
-120
-150
-200
-255
Unit
tAVQV
tACC
Address to
CE = OE = Min
Output Delay
VIL
Max
55
70
90
120
150
200
250
ns
tELQV
tCE
Chip Enable to
OE = VIL
Min
Output Delay
Max
55
70
90
120
150
200
250
ns
tGLQV
tOE
Output Enable to
CE = VIL
Min
Output Delay
Max
35
40
40
50
50
50
50
ns
tEHQZ,
tDF
Min
tGHQZ
(Note 2)
Max
25
25
25
30
30
30
30
ns
tAXQX
tOH
Min
0
0
0
0
0
0
0
Max
ns
Parameter
Symbols
Am27C256
Notes:
1. VCC must be applied simultaneously or before VPP, and removed simultaneously or after VPP.
2. This parameter is only sampled and not 100% tested.
3. Caution: The Am27C256 must not be removed from (or inserted into) a socket or board when VPP or VCC is applied.
4. For the -55 and -70:
Output Load: 1 TTL gate and CL = 30 pF
Input Rise and Fall Times: 20 ns
Input Pulse Levels: 0 V to 3 V
Timing Measurement Reference Level: 1.5 V for inputs and outputs
For all other versions:
Output Load: 1 TTL gate and CL = 100 pF
Input Rise and Fall Times: 20 ns
Input Pulse Levels: 0.45 V to 2.4 V
Timing Measurement Reference Level: 0.8 V and 2 V inputs and outputs
Chip Enable HIGH or
Output Enable HIGH,
whichever comes
first, to Output Float
Output Hold from
Addresses,
CE,
or
OE, whichever
occurred first


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