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參數(shù)資料
| 型號： | 74F163A |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 通用總線功能 |
| 英文描述： | Synchronous Presettable Binary Counter(同步可預(yù)置的二進制計數(shù)器) |
| 中文描述： | 同步可預(yù)置二進制計數(shù)器（同步可預(yù)置的二進制計數(shù)器） |
| 文件頁數(shù)： | 3/10頁 |
| 文件大?。?/td> | 197K |
| 代理商： | 74F163A |
Functional Description
The ’F161A and ’F163A count in modulo-16 binary se-
quence. From state 15 (HHHH) they increment to state 0
(LLLL). The clock inputs of all flip-flops are driven in parallel
through a clock buffer. Thus all changes of the Q outputs
(except due to Master Reset of the ’F161A) occur as a re-
sult of, and synchronous with, the LOW-to-HIGH transition
of the CP input signal. The circuits have four fundamental
modes of operation, in order of precedence: asynchronous
reset (’F161A), synchronous reset (’F163A), parallel load,
count-up and hold. Five control inputsDMaster Reset (MR,
’F161A), Synchronous Reset (SR, ’F163A), Parallel Enable
(PE), Count Enable Parallel (CEP) and Count Enable Trickle
(CET)Ddetermine the mode of operation, as shown in the
Mode Select Table. A LOW signal on MR overrides all other
inputs and asynchronously forces all outputs LOW. A LOW
signal on SR overrides counting and parallel loading and
allows all outputs to go LOW on the next rising edge of CP.
A LOW signal on PE overrides counting and allows informa-
tion on the Parallel Data (P
n
) inputs to be loaded into the
flip-flops on the next rising edge of CP. With PE and MR
(’F161A) or SR (’F163A) HIGH, CEP and CET permit count-
ing when both are HIGH. Conversely, a LOW signal on ei-
ther CEP or CET inhibits counting.
The ’F161A and ’F163A use D-type edge triggered flip-flops
and changing the SR, PE, CEP and CET inputs when the CP
is in either state does not cause errors, provided that the
recommended setup and hold times, with respect to the ris-
ing edge of CP, are observed.
The Terminal Count (TC) output is HIGH when CET is HIGH
and the counter is in state 15. To implement synchronous
multi-stage counters, the TC outputs can be used with the
CEP and CET inputs in two different ways. Please refer to
the ’F568 data sheet. The TC output is subject to decoding
spikes due to internal race conditions and is therefore not
recommended for use as a clock or asynchronous reset for
flip-flops, counters or registers.
Logic Equations: Count Enable
e
CEP
#
CET
#
PE
TC
e
Q
0
#
Q
1
#
Q
2
#
Q
3
#
CET
Mode Select Table
*
SR
PE
CET
CEP
Action on the Rising
Clock Edge (
L
)
L
H
H
H
H
X
L
H
H
H
X
X
H
L
X
X
X
H
X
L
Reset (Clear)
Load (P
n
Q
n
)
Count (Increment)
No Change (Hold)
No Change (Hold)
*
For ’F163A only
H
e
HIGH Voltage Level
L
e
LOW Voltage Level
X
e
Immaterial
State Diagram
TL/F/9486–5
3
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 74F163APC | Synchronous Presettable Binary Counter |
| 74F163ASC | Synchronous Presettable Binary Counter |
| 74F163ASJ | Synchronous Presettable Binary Counter |
| 74F164A | Serial-In, Parallel-Out Shift Register(串進并出移位寄存器) |
| 74F181 | 4-Bit Arithmetic Logic Unit(4位算術(shù)邏輯單元) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 74F163A_TMH3026B WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| 74F163AD | 制造商:North American Philips Discrete Products Div 功能描述:74F163AD 制造商:NXP Semiconductors 功能描述:F/FAST SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT UP BINARY COUNTER, PDSO16 制造商:NXP Semiconductors 功能描述:74F163AD |
| 74F163AN | 制造商:NXP Semiconductors 功能描述:Counter, Up, 4 Bit Binary, 16 Pin, Plastic, DIP |
| 74F163APC | 功能描述:計數(shù)器 IC Syn 4-Bit Binary Ctr RoHS:否 制造商:NXP Semiconductors 計數(shù)器類型:Binary Counters 邏輯系列:74LV 位數(shù):10 計數(shù)法: 計數(shù)順序: 工作電源電壓:1 V to 5.5 V 工作溫度范圍:- 40 C to + 125 C 封裝 / 箱體:SOT-109 封裝:Reel |
| 74F163APC | 制造商:Fairchild Semiconductor Corporation 功能描述:IC COUNTERS/MULTIPLIERS/DIVIDERS LOGIC |
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