參數(shù)資料
型號: ATF1508ASVL-20JI84
廠商: ATMEL CORP
元件分類: PLD
英文描述: Highperformance EE PLD
中文描述: EE PLD, 20 ns, PQCC84
封裝: PLASTIC, MS-018AF, LCC-84
文件頁數(shù): 12/22頁
文件大?。?/td> 519K
代理商: ATF1508ASVL-20JI84
ATF1508ASV(L)
12
Power-down Mode
The ATF1508ASV(L) includes two pins for optional pin-
controlled power-down feature. When this mode is
enabled, the PD pin acts as the power-down pin. When the
PD1 and PD2 pin is high, the device supply current is
reduced to less than 5 mA. During power-down, all output
data and internal logic states are latched and held. There-
fore, all registered and combinatorial output data remain
valid. Any outputs that were in a high-Z state at the onset
will remain at high-Z. During power-down, all input signals
except the power-down pin are blocked. Input and I/O hold
latches remain active to ensure that pins do not float to
indeterminate levels, further reducing system power. The
power-down pin feature is enabled in the logic design file.
Designs using either power-down pin may not use the PD
pin logic array input. However, buried logic resources in
this macrocell may still be used.
Notes:
1. For slow slew outputs, add t
SSO
.
2. Pin or product term.
Power Down AC Characteristics
(1)(2)
Symbol
Parameter
-15
-20
Units
Min
Max
Min
Max
t
IVDH
Valid I, I/O before PD High
15
20
ns
t
GVDH
Valid OE
(2)
before PD High
15
20
ns
t
CVDH
Valid Clock
(2)
before PD High
15
20
ns
t
DHIX
I, I/O Don
t Care after PD High
25
30
ns
t
DHGX
OE
(2)
Don
t Care after PD High
25
30
ns
t
DHCX
Clock
(2)
Don
t Care after PD High
25
30
ns
t
DLIV
PD Low to Valid I, I/O
1
1
μs
t
DLGV
PD Low to Valid OE (Pin or Term)
1
1
μs
t
DLCV
PD Low to Valid Clock (Pin or Term)
1
1
μs
t
DLOV
PD Low to Valid Output
1
1
μs
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