參數(shù)資料
型號(hào)： 74F579
廠商： NXP Semiconductors N.V.
元件分類： 通用總線功能
英文描述： 8-bit bidirectional binary counter 3-State
中文描述： 8位二進(jìn)制計(jì)數(shù)器雙向三態(tài)
文件頁(yè)數(shù)： 2/14頁(yè)
文件大?。?/td> 112K
代理商： 74F579
Philips Semiconductors
Product specification
74F579
8-bit bidirectional binary counter (3-State)
2
1992 May 04
853-0377 06639
FEATURES
Fully synchronous operation
Multiplexed 3-State I/O ports for bus oriented applications
Built in cascading carry capability
U/D pin to control direction of counting
Separate pins for Master reset and Synchronous operation
Center power pins to reduce effects of package inductance
Count frequency 115MHz Typ
Supply current 100mA Typ
See 74F269 for 24-pin separate I/O port version
See 74F779 for 16-pin version
DESCRIPTION
The 74F579 is a fully synchronous 8-stage Up/Down Counter with
multiplexed 3-State I/O ports for bus-oriented applications. It
features a preset capability for programmable operation, carry
look-ahead for easy cascading and a U/D input to control the
direction of counting. All state changes, except for the case of
asynchronous reset, are initiated by the rising edge of the clock.
TC output is not recommended for use as a clock or asynchronous
reset due to the possibility of decoding spikes.
PIN CONFIGURATION
20
19
18
17
16
15
14
13
12
10
11
9
8
7
6
5
4
3
2
1
CP
I/O0
I/O1
I/O2
I/O3
GND
I/O4
I/O5
I/O6
I/O7
VCC
MR
SR
CEP
CET
TC
PE
CS
OE
U/D
SF01085
ORDERING INFORMATION
TYPE
TYPICAL f
MAX
TYPICAL SUPPLY
CURRENT
(TOTAL)
74F579
115MHz
100mA
ORDERING INFORMATION
DESCRIPTION
COMMERCIAL RANGE
V
CC
= 5V
±
10%,
T
amb
= 0
°
C to +70
°
C
PKG DWG #
20-Pin Plastic DIP
N74F579N
SOT146-1
20-Pin Plastic SOL
N74F579D
SOT163-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
DESCRIPTION
74F(U.L.)
HIGH/LOW
LOAD VALUE
HIGH/LOW
I/O
n
Data Inputs
3.5/1.0
70
μ
A/0.6mA
Data Outputs
150/40
3.0mA/24mA
PE
Parallel Enable input (active Low)
1.0/1.0
20
μ
A/0.6mA
U/D
Up/Down count control input
1.0/1.0
20
μ
A/0.6mA
MR
Master Reset input (active Low)
1.0/1.0
20
μ
A/0.6mA
SR
Synchronous Reset input (active Low)
1.0/1.0
20
μ
A/0.6mA
CEP
Count Enable Parallel input (active Low)
1.0/1.0
20
μ
A/0.6mA
CET
Count Enable Trickle input (active Low)
1.0/1.0
20
μ
A/0.6mA
CS
Chip Select input (active Low)
1.0/1.0
20
μ
A/0.6mA
OE
Output Enable input (active Low)
1.0/1.0
20
μ
A/0.6mA
CP
Clock input (active Rising Edge)
1.0/1.0
20
μ
A/0.6mA
TC
Terminal Count Output (active Low)
50/33
1.0mA/20mA
NOTE:
One (1.0) FAST Unit Load (U.L.) is defined as: 20
μ
A in the High state and 0.6mA in the Low state.
相關(guān)PDF資料
PDF描述
74F579PCQR 8-Bit Bidirectional Binary Counter with TRI-STATE Outputs
74F579 8-Bit Bidirectional Binary Counter with 3-STATE Outputs
74F579SC 8-Bit Bidirectional Binary Counter with 3-STATE Outputs
74F579SJ 8-Bit Bidirectional Binary Counter with 3-STATE Outputs
74F579PC 8-Bit Bidirectional Binary Counter with 3-STATE Outputs
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
74F579_00 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:8-Bit Bidirectional Binary Counter with 3-STATE Outputs
74F579D 制造商:undefined 功能描述:
74F579PC 功能描述:計(jì)數(shù)器移位寄存器 8-Bit Bidir Bin Ctr RoHS:否 制造商:Texas Instruments 計(jì)數(shù)器類型: 計(jì)數(shù)順序:Serial to Serial/Parallel 電路數(shù)量:1 封裝 / 箱體:SOIC-20 Wide 邏輯系列: 邏輯類型: 輸入線路數(shù)量:1 輸出類型:Open Drain 傳播延遲時(shí)間:650 ns 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝:Reel
74F579PC 92 制造商:n/a 功能描述:74F579
74F579PC_Q 功能描述:計(jì)數(shù)器 IC 8-Bit Bidir Bin Ctr 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
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*