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SN74HC590ADE4 Scheda tecnica(PDF) 2 Page - Texas Instruments

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Il numero della parte SN74HC590ADE4
Spiegazioni elettronici  8-BIT BINARY COUNTERS WITH 3-STATE OUTPUT REGISTERS
PDF  19 Pages
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Produttore elettronici  TI [Texas Instruments]
Homepage  http://www.ti.com
Logo TI - Texas Instruments

SN74HC590ADE4 Scheda tecnica(HTML) 2 Page - Texas Instruments

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SN54HC590A, SN74HC590A
8BIT BINARY COUNTERS
WITH 3STATE OUTPUT REGISTERS
SCLS039F − DECEMBER 1982 − REVISED SEPTEMBER 2003
2
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
timing diagram
RCO
QA−QH
CCKEN
CCLR
OE
CCLK
COUNTER
(internal)
RCLK
Hex 01
Hex 02
Hex 03
Hex 04
Hex 05
Hex FD
Hex FE
Hex FF
Hex 00
Hex01
Hex 00
Hex 01
Hi-Z
Hex 01
Hex 05
Hex 00
TIMING SEQUENCE
1. Clear Counter (asynchronous).
2. Count up: 0x01. Store 0x00 in register.
3. Inhibit counter clock (CCKEN = HIGH). Store 0x01 in register.
4. Count 0x02, 0x03.
5. 3-state the outputs
6. Count up: 0x04
7. Enable outputs.
8. Continue up: 0x05
9. Store 0x05 in register.
10. Continue counting: 0x06...0xFD, 0xFE, 0xFF, 0x00, etc.
11. Store 0x00 in register.
Don’t
Care
Hex 00
Don’t
Care



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