HCTL-2022 Avago Technologies US Inc., HCTL-2022 Datasheet - Page 12

• Manufacturer Part Number: HCTL-2022
• Description: QUADRATURE DECODER/COUNTER INTER
• Manufacturer: Avago Technologies US Inc.
• Type: Quadrature Decoder/ Counter Interface ICr

Specifications of HCTL-2022

• Package / Case: 20-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole
• Voltage - Supply: 4.5 V ~ 5.5 V
• Applications: Encoder to Microprocessor
• Interface: 8-Bit Tristate
• Maximum Operating Temperature: + 100 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
• Other names: Q2414340A

Operation
A block diagram of the HCTL-20XX-XX family is shown
in Figure 10. The operation of each major function is de-
scribed in the following sections.

Figure 10. Simplified Logic Diagram
OE
XNY
SEL1
SEL2
EN1
EN2
CHBY
RSTX
RSTY
CHAX
CHBX
CHAY
CHIX
CHIY
CLK
Digital Filter
CHAX filtered
CHBX filtered
CHAY filtered
CHBY filtered
CHIX filtered
CHIY filtered
Decode Logic
EN1
4x/2x/1x
UP/DN X
UP/DN Y
CNTX
CNTY
EN2
UP/DN X
CNTY
UP/DN Y
CNTX
32 Bits Binary
CLRX
CLRY
RX
QX0 - QX31
Counter
QY0 - QY31
RY
32
32
CLRX
CLRY
DX0 - DX31
CLRX
CLRY
DY0 - DY31
SEL1
32 Bits Latch
Inhibit Block
INHX
DX0 - DX7
DX8 - DX15
DX16 - DX23
DX24 - DX31
DY0 - DY7
DY8 - DY15
DY16 - DY23
DY24 - DY31
SEL2 OE
INHY
8
8
8
8
8
8
8
8
Decode / Cascade
DX0 - DX7
SEL1
SEL2
DX8 - DX15
DX16 - DX23
DX24 - DX31
Decode / Cascade
DY0 - DY7
DY8 - DY15
DY16 - DY23
DY24 - DY31
OE
Mux/Buffer
Outputs (X)
Octal 4 bit
Outputs (Y)
U/DX
U/DY
CNTCASX
CNTDECX
CNTDECY
CNTCASY
XNY
D0 - D7
8