74HC590 Datasheet, PDF (2/21 Pages) NXP Semiconductors – 8-bit binary counter with output register; 3-state

NXP Semiconductors
4. Functional diagram
74HC590
8-bit binary counter with output register; 3-state
Fig 1. Functional diagram
12 CE
11 CPC
10 MRC
8-BIT BINARY COUNTER
13 CPR
RCO 9
8-BIT STORAGE REGISTER
14 OE
3-STATE OUTPUTS
Q0 15
Q1 1
Q2 2
Q3 3
Q4 4
Q5 5
Q6 6
Q7 7
001aac542
11
CPC
12
CE
MRC
10
13
CPR
9
RCO
15
Q0
1
Q1
2
Q2
3
Q3
4
Q4
5
Q5
6
Q6
7
Q7
OE
14 _001aac544
Fig 2. Logic symbol
OE ¹⁴
CPR ¹³
CE ¹²
CPC ¹¹
MRC ¹⁰
EN3
C2
G1 ^CTR8
1+ (CT=255)Z4
CT=0
1D
2D 3
2D 3
Fig 3. IEC logic symbol
9
RCO
15
Q0
1
Q1
2
Q2
3 _Q3
4
Q4
5
Q5
6
Q6
7 _Q7
001aac545
74HC590_2
Product data sheet
Rev. 02 — 28 April 2009
© NXP B.V. 2009. All rights reserved.
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