74F579 Philips, 74F579 Datasheet - Page 2

• Manufacturer Part Number: 74F579
• Description: 8-bit bidirectional binary counter 3-State
• Manufacturer: Philips

Philips Semiconductors
FEATURES
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.
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
NOTE: One (1.0) FAST Unit Load (U.L.) is defined as: 20 A in the High state and 0.6mA in the Low state.
1992 May 04
I/O
I/O
PE
U/D
MR
SR
CEP
CET
CS
OE
CP
TC
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
8-bit bidirectional binary counter (3-State)
n
PINS
Data Inputs
Data Outputs
Parallel Enable input (active Low)
Up/Down count control input
Master Reset input (active Low)
Synchronous Reset input (active Low)
Count Enable Parallel input (active Low)
Count Enable Trickle input (active Low)
Chip Select input (active Low)
Output Enable input (active Low)
Clock input (active Rising Edge)
Terminal Count Output (active Low)
DESCRIPTION
2
PIN CONFIGURATION
ORDERING INFORMATION
ORDERING INFORMATION
20-Pin Plastic DIP
20-Pin Plastic SOL
74F579
TYPE
DESCRIPTION
GND
TYPICAL f
I/O0
I/O1
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7
CP
115MHz
COMMERCIAL RANGE
10
1
2
3
4
5
6
7
8
9
T
HIGH/LOW
74F(U.L.)
amb
V
3.5/1.0
150/40
1.0/1.0
1.0/1.0
1.0/1.0
1.0/1.0
1.0/1.0
1.0/1.0
1.0/1.0
1.0/1.0
1.0/1.0
50/33
CC
MAX
N74F579N
N74F579D
= 0 C to +70 C
= 5V 10%,
SF01085
20
19
18
17
16
15
14
13
12
11
TYPICAL SUPPLY
MR
SR
CEP
CET
VCC
TC
U/D
PE
CS
OE
Product specification
CURRENT
LOAD VALUE
3.0mA/24mA
1.0mA/20mA
(TOTAL)
70 A/0.6mA
20 A/0.6mA
20 A/0.6mA
20 A/0.6mA
20 A/0.6mA
20 A/0.6mA
20 A/0.6mA
20 A/0.6mA
20 A/0.6mA
20 A/0.6mA
HIGH/LOW
100mA
853-0377 06639
SOT146-1
SOT163-1
74F579
PKG DWG #