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54F410 数据表(PDF) 2 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部件名 54F410
功能描述  Register Stack횖16 x 4 RAM TRI-STATEE Output Register
Download  8 Pages
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

54F410 数据表(HTML) 2 Page - National Semiconductor (TI)

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Unit LoadingFan Out
54F74F
Pin Names
Description
UL
Input IIH IIL
HIGHLOW
Output IOH IOL
A0–A3
Address Inputs
1010
20 mA b06 mA
D0–D3
Data Inputs
1010
20 mA b06 mA
CS
Chip Select Input (Active LOW)
1020
20 mA b12 mA
OE
Output Enable Input (Active LOW)
1010
20 mA b06 mA
WE
Write Enable Input (Active LOW)
1010
20 mA b06 mA
CP
Clock Input (Outputs Change on
LOW-to-HIGH Transition)
1020
20 mA b12 mA
Q0–Q3
TRI-STATE Outputs
15040 (333)
b
3 mA24 mA (20 mA)
Functional Description
Write Operation
When the three control inputs Write En-
able (WE) Chip Select (CS) and Clock (CP) are LOW the
information on the data inputs (D0–D3) is written into the
memory location selected by the address inputs (A0–A3) If
the input data changes while WE CS and CP are LOW the
contents of the selected memory location follow these
changes provided setup and hold time criteria are met
Read Operation
Whenever CS is LOW and CP goes from
LOW-to-HIGH the contents of the memory location select-
ed by the address inputs (A0–A3) are edge-triggered into
the Output Register
The (OE) input controls the output buffers When OE is
HIGH the four outputs (Q0–Q3) are in a high impedance or
OFF state when OE is LOW the outputs are determined by
the state of the Output Register
Block Diagram
TLF9538 – 4
2


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