參數(shù)資料
型號(hào): 933795210602
廠(chǎng)商: NXP SEMICONDUCTORS
元件分類(lèi): 計(jì)數(shù)器
英文描述: F/FAST SERIES, SYN POSITIVE EDGE TRIGGERED 8-BIT BIDIRECTIONAL BINARY COUNTER, PDIP16
封裝: PLASTIC, SOT-38-4, DIP-16
文件頁(yè)數(shù): 2/8頁(yè)
文件大?。?/td> 110K
代理商: 933795210602
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
VCC
TC
S0
S1
OE
I/O2
I/O3
GND
I/O4
I/O5
I/O7
I/O6
SF01259
TYPE
TYPICAL fMAX
TYPICAL
SUPPLY CURRENT
(TOTAL)
74F779
145MHz
90mA
ORDERING INFORMATION
DESCRIPTION
COMMERCIAL RANGE
VCC = 5V ±10%,
Tamb = 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
A/0.6mA
I/On
Data outputs
150/40
3.0mA/24mA
S0, S1
Select inputs
1.0/1.0
20
A/0.6mA
OE
Output Enable input (active Low)
1.0/1.0
20
A/0.6mA
CET
Count Enable Trickle input (active Low)
1.0/1.0
20
A/0.6mA
CP
Clock input (active rising edge)
1.0/1.0
20
A/0.6mA
TC
Terminal Count output (active Low)
50/33
1.0mA/20mA
NOTE:
One (1.0) FAST Unit Load is defined as: 20
A in the High state and 0.6mA in the Low state.
相關(guān)PDF資料
PDF描述
933828990602 F/FAST SERIES, SYN POSITIVE EDGE TRIGGERED 8-BIT BIDIRECTIONAL BINARY COUNTER, PDSO16
933831500215 100 mA, 30 V, 2 CHANNEL, NPN AND PNP, Si, SMALL SIGNAL TRANSISTOR
933834420115 500 mA, NPN, Si, SMALL SIGNAL TRANSISTOR
933835230215 100 mA, 30 V, 2 CHANNEL, NPN, Si, SMALL SIGNAL TRANSISTOR
933831480215 100 mA, 30 V, 2 CHANNEL, NPN, Si, SMALL SIGNAL TRANSISTOR
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