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參數(shù)資料
| 型號(hào)： | 74LS161 |
| 廠商： | System Logic Semiconductor Co., Ltd. |
| 元件分類： | 通用總線功能 |
| 英文描述： | Synchronous 4 Bit Counters; Binary, Direct Reset |
| 中文描述： | 同步4位計(jì)數(shù)器，二進(jìn)制，直接復(fù)位 |
| 文件頁數(shù)： | 6/6頁 |
| 文件大小： | 79K |
| 代理商： | 74LS161 |
5-6
FAST AND LS TTL DATA
SN54/74LS160A
SN54/74LS161A
SN54/74LS162A
SN54/74LS163A
Figure 3
The positive TC pulse occurs when the outputs are in the
(Q0
Q1
Q2
Q3) state for the LS160 and LS162 and the
(Q0
Q1
Q2
Q3) state for the LS161 and LS163.
OTHER CONDITIONS: CP = PE = CEP = MR = H
1.3 V
tPHL
tPLH
1.3 V
1.3 V
1.3 V
CET
TC
AC WAVEFORMS (continued)
The positive TC pulse is coincident with the output state
(Q0
Q1
Q2
Q3) state for the LS161 and LS163 and
(Q0
Q1
Q2
Q3) for the LS161 and LS163.
Figure 4
OTHER CONDITIONS: PE = CEP = CET = MR = H
1.3 V
1.3 V
1.3 V
1.3 V
1.3 V
tPLH
tPHL
CP
TC
The shaded areas indicate when the input is permitted to
change for predictable output performance.
Figure 5
1.3 V
1.3 V
OTHER CONDITIONS: PE = L, MR = H
CP
1.3 V
1.3 V
1.3 V
ts(H)
ts(L)
th(H) = 0
th(L) = 0
Q0
Q1
Q2
Q3
P0
P1
P2
P3
OTHER CONDITIONS: PE = H, MR = H
1.3 V
1.3 V
1.3 V
1.3 V
1.3 V
1.3 V
1.3 V
1.3 V
1.3 V
1.3 V
ts(H)
ts(L)
th(H) = 0
th(L) = 0
ts(H)
th(H) = 0
ts(L)
th(L) = 0
COUNT
HOLD
HOLD
CEP
CP
CET
Q
CP
SR or PE
Q RESPONSE TO PE
RESET
COUNT OR LOAD
Q RESPONSE TO SR
PARALLEL LOAD
(See Fig. 5)
COUNT MODE
(See Fig. 7)
ts(L)
ts(H)
th(L) = 0
th(H) = 0
1.3 V
1.3 V
Figure 6
COUNT ENABLE TRICKLE INPUT
TO TERMINAL COUNT OUTPUT DELAYS
CLOCK TO TERMINAL COUNT DELAYS
SETUP TIME (ts) AND HOLD TIME (th)
FOR PARALLEL DATA INPUTS
SETUP TIME (ts) AND HOLD TIME (th) FOR
COUNT ENABLE (CEP) AND (CET) AND
PARALLEL ENABLE (PE) INPUTS
Figure 7
The shaded areas indicate when the input is permitted to
change for predictable output performance.
1.3 V
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 74LS161A WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| 74LS161ADC | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| 74LS161AN | 制造商:SIGNETICS 功能描述:74LS161 N6E2B 制造商:NXP Semiconductors 功能描述: 制造商:Texas Instruments 功能描述: |
| 74LS161ANDS | 制造商:Motorola Inc 功能描述:Counter, Up, 4 Bit Binary, 16 Pin, Plastic, DIP |
| 74LS161APC | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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