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參數(shù)資料
| 型號(hào)： | 74F779 |
| 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)(8位雙向二進(jìn)制計(jì)數(shù)器（三態(tài)）) |
| 中文描述： | 8位雙向二進(jìn)制計(jì)數(shù)器（3態(tài)）（8位雙向二進(jìn)制計(jì)數(shù)器（三態(tài)）） |
| 文件頁(yè)數(shù)： | 2/12頁(yè) |
| 文件大?。?/td> | 100K |
| 代理商： | 74F779 |
Philips Semiconductors
Product specification
74F779
8-bit bidirectional binary counter (3-State)
2
1989 Sep 20
853–0385 97676
FEATURES
Multiplexed 3-State I/O ports for bus oriented applications
Built-in look-ahead carry capability
Center power pins to reduce effects of package inductance
Count frequency 145MHz typical
Supply current 90mA typical
See 74F269 for 24-pin separate I/O port version
See 74F579 for 20-pin version
See 74F1779 for extended function version of the 74F799
DESCRIPTION
The 74F779 is a fully synchronous 8-stage Up/Down Counter with
multiplexed 3-State I/O ports for bus-oriented applications. All
control functions (hold, count up, count down, synchronous load) are
controlled by two mode pine (S0, S1). The device also features
carry look-ahead for easy cascading. All state changes are initiated
by the rising edge of the clock. When CET is High the data outputs
are held in their current state and TC is held High. The TC output is
not recommended for use as a clock or asynchronous reset due to
the possibility of decoding spikes.
PIN CONFIGURATION
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
I/O1
I/O0
CP
CET
V
CC
TC
S0
S1
OE
I/O2
I/O3
GND
I/O4
I/O5
I/O7
I/O6
SF01259
TYPE
TYPICAL f
MAX
TYPICAL
SUPPLY CURRENT
(TOTAL)
74F779
145MHz
90mA
ORDERING INFORMATION
DESCRIPTION
COMMERCIAL RANGE
V
CC
= 5V
±
10%,
T
amb
= 0
°
C to +70
°
C
PKG DWG #
16-Pin Plastic DIP
N74F779N
SOT38-4
16-Pin Plastic SOL
N74F779D
SOT 162-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
DESCRIPTION
74F(U.L.)
HIGH/LOW
LOAD VALUE
HIGH/LOW
I/On
Data inputs
3.5/1.0
70
μ
A/0.6mA
Data outputs
150/40
3.0mA/24mA
S0, S1
Select inputs
1.0/1.0
20
μ
A/0.6mA
20
μ
A/0.6mA
20
μ
A/0.6mA
20
μ
A/0.6mA
OE
Output Enable input (active Low)
1.0/1.0
CET
Count Enable Trickle input (active Low)
1.0/1.0
CP
Clock input (active rising edge)
1.0/1.0
TC
Terminal Count output (active Low)
50/33
1.0mA/20mA
NOTE:
One (1.0) FAST Unit Load is defined as: 20
μ
A in the High state and 0.6mA in the Low state.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 74F779 WAF | 制造商:Rochester Electronics LLC 功能描述: |
| 74F779N | 制造商:NXP Semiconductors 功能描述: |
| 74F779PC | 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 |
| 74F779PCQR | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:8-Bit Bidirectional Binary Counter with TRI-STATE Outputs |
| 74F779SC | 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 |
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