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参数资料
| 型号： | 54F194LMQB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 计数移位寄存器 |
| 英文描述： | F/FAST SERIES, 4-BIT BIDIRECTIONAL PARALLEL IN PARALLEL OUT SHIFT REGISTER, TRUE OUTPUT, CQCC20 |
| 封装： | LCC-16 |
| 文件页数： | 2/8页 |
| 文件大小： | 373K |
| 代理商： | 54F194LMQB |
Unit LoadingFan Out
Pin
54F74F
Names
Description
UL
Input IIH IIL
HIGHLOW
Output IOH IOL
S0 S1
Mode Control Inputs
1010
20 mA b06 mA
P0–P3
Parallel Data Inputs
1010
20 mA b06 mA
DSR
Serial Data Input (Shift Right)
1010
20 mA b06 mA
DSL
Serial Data Input (Shift Left)
1010
20 mA b06 mA
CP
Clock Pulse Input (Active Rising Edge)
1010
20 mA b06 mA
MR
Asynchronous Master Reset Input (Active LOW)
1010
20 mA b06 mA
Q0–Q3
Parallel Outputs
50333
b
1 mA20 mA
Functional Description
The ’F194 contains four edge-triggered D flip-flops and the
necessary interstage logic to synchronously perform shift
right shift left parallel load and hold operations Signals
applied to the Select (S0 S1) inputs determine the type of
operation as shown in the Mode Select Table Signals on
the Select Parallel data (P0–P3) and Serial data (DSR DSL)
inputs can change when the clock is in either state provid-
ed only that the recommended setup and hold times with
respect to the clock rising edge are observed A LOW sig-
nal on Master Reset (MR) overrides all other inputs and
forces the outputs LOW
Mode Select Table
Operating
Inputs
Outputs
Mode
MR
S1
S0
DSR
DSL
Pn
Q0
Q1
Q2
Q3
Reset
L
X
LLLL
Hold
H
l
X
q0
q1
q2
q3
Shift Left
H
h
l
X
l
X
q1
q2
q3
L
Hh
l
X
h
X
q1
q2
q3
H
Shift Right
H
l
h
l
X
L
q0
q1
q2
Hl
h
X
H
q0
q1
q2
Parallel Load
H
h
X
pn
p0
p1
p2
p3
H (h) e High Voltage Level
L (l) e Low Voltage Level
pn (qn) e Lower case letters indicate the state of the referenced input (or output) one setup time prior to the LOW-to-HIGH clock transition
X e Immaterial
Logic Diagram
TLF9498 – 4
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays
2
Obsolete
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 54F20 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Dual 4-Input NAND Gate |
| 54F20 WAF | 制造商:Texas Instruments 功能描述: |
| 54F20/B2A | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Dual 4-input NAND Gate |
| 54F20/B2C | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Dual 4-input NAND Gate |
| 54F20/BCA | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Dual 4-input NAND Gate |
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