參數(shù)資料
型號(hào): MC74HC161ADT
廠商: ON SEMICONDUCTOR
元件分類: 通用總線功能
英文描述: Presettable Counters
中文描述: HC/UH SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT UP BINARY COUNTER, PDSO16
封裝: TSSOP-16
文件頁(yè)數(shù): 12/16頁(yè)
文件大?。?/td> 144K
代理商: MC74HC161ADT
MC74HC161A, MC74HC163A
http://onsemi.com
12
INPUTS
OUTPUTS
TO MORE
LOAD
H = COUNT
L = DISABLE
H = COUNT
L = DISABLE
RESET
CLOCK
LOAD P0 P1 P2 P3
ENABLE P
ENABLE T
CLOCK
R
Q0 Q1 Q2 Q3
RIPPLE
CARRY
OUT
LOAD
RESET
CLOCK
ENABLE P
ENABLE T
TYPICAL APPLICATIONS CASCADING
NOTE: When used in these cascaded configurations the clock fmax guaranteed limits may not apply. Actual performance will
depend on number of stages. This limitation is due to set up times between Enable (Port) and Clock.
OUTPUTS
OUTPUTS
Figure 14. N–Bit Synchronous Counters
Figure 15. Nibble Ripple Counter
SIGNIFICANT
STAGES
INPUTS
INPUTS
LOAD P0 P1 P2 P3
ENABLE P
ENABLE T
CLOCK
R
Q0 Q1 Q2 Q3
RIPPLE
CARRY
OUT
LOAD P0 P1 P2 P3
ENABLE P
ENABLE T
CLOCK
R
Q0 Q1 Q2 Q3
RIPPLE
CARRY
OUT
LOAD P0 P1 P2 P3
ENABLE P
ENABLE T
CLOCK
R
Q0 Q1 Q2 Q3
RIPPLE
CARRY
OUT
LOAD P0 P1 P2 P3
ENABLE P
ENABLE T
CLOCK
R
Q0 Q1 Q2 Q3
RIPPLE
CARRY
OUT
LOAD P0 P1 P2 P3
ENABLE P
ENABLE T
CLOCK
R
Q0 Q1 Q2 Q3
RIPPLE
CARRY
OUT
TO MORE
SIGNIFICANT
STAGES
INPUTS
OUTPUTS
OUTPUTS
OUTPUTS
INPUTS
INPUTS
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