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參數(shù)資料
| 型號： | HEF4518BF |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 通用總線功能 |
| 英文描述： | Dual BCD counter |
| 中文描述： | 雙BCD碼計(jì)數(shù)器 |
| 文件頁數(shù)： | 2/7頁 |
| 文件大?。?/td> | 66K |
| 代理商： | HEF4518BF |
January 1995
2
Philips Semiconductors
Product specification
Dual BCD counter
HEF4518B
MSI
DESCRIPTION
T he HEF4518B is a dual 4-bit internally synchronous BCD
counter. The counter has an active HIGH clock input
(CP
0
) and an active LOW clock input (CP
1
), buffered
outputs from all four bit positions (O
0
to O
3
) and an active
HIGH overriding asynchronous master reset input (MR).
The counter advances on either the LOW to HIGH
transition of the CP
0
input if CP
1
is HIGH or the HIGH to
LOW transition of the CP
1
input if CP
0
is LOW. Either CP
0
or CP
1
may be used as the clock input to the counter and
the other clock input may be used as a clock enable input.
A HIGH on MR resets the counter (O
0
to O
3
= LOW)
independent of CP
0
, CP
1
.
Schmitt-trigger action in the clock input makes the circuit
highly tolerant to slower clock rise and fall times.
Fig.1 Functional diagram.
HEF4518BP(N):
HEF4518BD(F):
HEF4518BT(D):
( ): Package Designator North America
16-lead DIL; plastic (SOT38-1)
16-lead DIL; ceramic (cerdip) (SOT74)
16-lead SO; plastic (SOT109-1)
Fig.2 Pinning diagram.
PINNING
CP
0A
, CP
0B
CP
1A
, CP
1B
MR
A
, MR
B
O
0A
to O
3A
O
0B
to O
3B
clock inputs (L to H triggered)
clock inputs (H to L triggered)
master reset inputs
outputs
outputs
APPLICATION INFORMATION
Some examples of applications for the HEF4518B are:
Multistage synchronous counting.
Multistage asynchronous counting.
Frequency dividers.
FAMILY DATA, I
DD
LIMITS category MSI
See Family Specifications
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HEF4518BP | 制造商:NXP Semiconductors 功能描述:IC 4000 LOCMOS LOGIC 制造商:NXP Semiconductors 功能描述:IC, 4000 LOCMOS LOGIC 制造商:NXP Semiconductors 功能描述:IC, 4000 LOCMOS LOGIC, Counter Type:BCD, Clock Frequency:40MHz, Count Maximum:15, Supply Voltage Min:4.5V, Supply Voltage Max:15.5V, Logic Case Style:DIP, No. of Pins:16, Operating Temperature Min:-40C, Operating Temperature , RoHS Compliant: Yes |
| HEF4518BP,652 | 功能描述:計(jì)數(shù)器 IC DUAL BCD COUNTER RoHS:否 制造商:NXP Semiconductors 計(jì)數(shù)器類型:Binary Counters 邏輯系列:74LV 位數(shù):10 計(jì)數(shù)法: 計(jì)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 |
| HEF4518BP652 | 制造商:NXP Semiconductors 功能描述:IC BCD COUNTER DUAL DIP-16 |
| HEF4518BT | 制造商:NXP Semiconductors 功能描述:Counter Dual 4-Bit Decade UP 16-Pin SO Bulk |
| HEF4518BT,652 | 功能描述:計(jì)數(shù)器 IC DUAL BCD COUNTER RoHS:否 制造商:NXP Semiconductors 計(jì)數(shù)器類型:Binary Counters 邏輯系列:74LV 位數(shù):10 計(jì)數(shù)法: 計(jì)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 |
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