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Part: 74F579
Category:
Logic
-> Counters
Description: 74F579; 8-bit Bidirectional Binary Counter (3-State);; Package: SOT146-1 (DIP20), SOT163 (SO20)
Company: Philips Semiconductors
Datasheet: Download 74F579 datasheet File size : 222 kB
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INTEGRATED CIRCUITS
74F579 8-bit bidirectional binary counter (3-State)
Product specification Supersedes data of 1992 May 04 2000 Dec 18
Philips Semiconductors
Philips Semiconductors
Product specification
8-bit bidirectional binary counter (3-State)
74F579
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 115 MHz Typ · Supply current 100 mA 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
CP I/O0 I/O1 I/O2 I/O3 GND I/O4 I/O5 I/O6 I/O7 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 MR SR CEP CET VCC TC U/D PE CS OE
SF01085
ORDERING INFORMATION
TYPE 74F579 TYPICAL fMAX 115MHz TYPICAL SUPPLY CURRENT (TOTAL) 100 mA
ORDERING INFORMATION
DESCRIPTION 20-Pin Plastic DIP 20-Pin Plastic SOL COMMERCIAL RANGE VCC = 5 V ±10%, Tamb = 0 to +70 °C N74F579N N74F579D PKG DWG # SOT146-1 SOT163-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS Data Inputs I/On PE U/D MR SR CEP CET CS OE CP TC 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 74F(U.L.) HIGH/LOW 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 LOAD VALUE HIGH / LOW 70 µA / 0.6 mA 3.0 mA / 24 mA 20 µA/ 0.6 mA 20 µA / 0.6 mA 20 µA / 0.6 mA 20 µA / 0.6 mA 20 µA / 0.6 mA 20 µA / 0.6 mA 20 µA / 0.6 mA 20 µA / 0.6 mA 20 µA/ 0.6 mA 1.0 mA / 20 mA
NOTE: One (1.0) FAST Unit Load (U.L.) is defined as: 20 µA in the High state and 0.6 mA in the Low state.
2000 Dec 18
2
853-0377 25265
Philips Semiconductors
Product specification
8-bit bidirectional binary counter (3-State)
74F579
LOGIC SYMBOL
13 12 20 19 14
LOGIC SYMBOL (IEEE/IEC)
CTR DIV 256 19 12 1 1 13 11 TC 15 14 1 1 1 R1 u1 & & EN3 M4[DOWN] 1 17 1 M5[UP] M2[LOAD]
1 18 17 11
CP CEP CET OE I/O0
PE
CS
MR
SR
U/D
I/O1
I/O2
I/O3
I/O4
I/O5 I/O6
I/O7
EN6 & G7
2 VCC = Pin 16 GND = Pin 6
3
4
5
7
8
9
10
18
1 2,5,7, +/C8 2,4,7 R9 [1] [2] [4] [8] [16] [32] [64] [128] 3,5,6,8 CT=256 3,4,6,8 CT=0 1,2,3,4, 5,6,7,8 2 3 4 5 7 8 9 10 15
SF01086
1
20
SF01087
FUNCTION TABLE
INPUTS MR X X X L H H H H H H H L X (not LL) = = = = = SR X X X X L H H H H H CS H L L X X L (not LL) (not LL) (not LL) (not LL) PE X H H X X L CEP X X X X X X H X L L CET X X X X X X X H L L U/D X X X X X X X X H L OE X H L X X X X X X X CP X X X X I/O0 to I/O7 in high impedance (PE disabled) I/O0 to I/O7 in high impedance Flip-flop output appears on I/On lines Asynchronous reset for all flip-flops Synchronous reset for all flip-flops Parallel load all flip-flops Hold Hold (TC held High) Count up Count down OPERATING MODE
High voltage level Low voltage level Don't care Low-to-High clock transition CS and PE should never be Low voltage level at the same time.
2000 Dec 18
3
Philips Semiconductors
Product specification
8-bit bidirectional binary counter (3-State)
74F579
LOGIC DIAGRAM
SR PE 19 13 CP 1 MR 20
CS 12
OE
11
I/O0 2
DETAIL A
I/O1
3
DETAIL A
I/O2 4
DETAIL A
I/O3 5
DETAIL A
I/O4
7
DETAIL A
I/O5 8
DETAIL A
I/O6 9
DETAIL A
I/O7 10 14 18 17 DATA LOAD TC 15
DETAIL A
U/D CEP CET
TOGGLE
CP
MR
D CP
Q Q
Q Q DETAIL A For pinouts refer to Package Pin Configurations
VCC=pin 16 GND=pin 6
SF01088
2000 Dec 18
4
Philips Semiconductors
Product specification
8-bit bidirectional binary counter (3-State)
74F579
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limits set forth in this table may impair the useful life of the device. Unless otherwise noted these limits are over the operating free-air temperature range.) SYMBOL VCC VIN IIN VO IO Tamb Tstg Supply voltage Input voltage Input current Voltage applied to output in High output state Current applied to output in Low output state applied to output in Low output state Operating free-air temperature range Storage temperature TC I/O0 PARAMETER RATING 0.5 to +7.0 0.5 to +7.0 30 to +5 0.5 to +VCC 40 48 0 to +70 65 to +150 UNIT V V mA V mA mA °C °C
RECOMMENDED OPERATING CONDITIONS
SYMBOL VCC VIH VIL IIK IOH Supply voltage High-level input voltage Low-level input voltage Input clamp current High-level output current output current TC I/On Low-level output current output current Operating free-air temperature range TC I/On 0 PARAMETER MIN 4.5 2.0 0.8 18 1 3 20 24 70 LIMITS NOM 5.0 MAX 5.5 V V V mA mA mA mA mA °C UNIT
IOL Tamb
2000 Dec 18
5
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