HCTL-2001-A00 - CMOS Quadrature Decoder/Counter IC | Broadcom
料号： HCTL-2001-A00 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $8.2 | $8.20 |
| 10 | $7.45 | $74.50 |
| 100 | $6.6 | $660.00 |
| 500 | $5.95 | $2,975.00 |
| 1,000 | $5.3 | $5,300.00 |
HCTL-2001-A00 概述
A quadrature decoder IC is a specialized interface that resolves two phase-shifted square-wave channels (often called CHA and CHB) from an incremental optical or magnetic rotary encoder into direction-aware digital position counts. This function sits in the motion-control signal chain between the encoder transducer and the host processor, where it replaces software decoding loops with deterministic hardware counting and noise rejection. Quadrature decoders belong to the broader family of sensor and detector interface ICs, with close relatives including incremental encoder counters, motion-control coprocessors, and motor-position feedback interfaces.
Key features of the HCTL-2001-A00 include 32-bit counter resolution, programmable digital filtering on the quadrature inputs to reject noise below a configurable pulse-width threshold, an 8-bit multiplexed data bus with chip-select and read strobe, a cascade output for multi-axis chaining via the HCTL-2021, and a TTL/CMOS-compatible interface. The integrated noise filter eliminates the need for external RC debouncing on encoder channels and improves reliability in electrically noisy industrial environments such as stepper-servo drive cabinets and CNC machinery.
The HCTL-2001-A00 is built on a low-power CMOS process with TTL-compatible inputs and three-state outputs, achieving 14 MHz internal operation while drawing only a few milliamps. The architecture separates noise-filtered quadrature decoding, the 32-bit latch, and the bus interface into independent functional blocks, allowing simultaneous count updates and host reads. The cascade architecture, when used with the HCTL-2021-A00 companion, supports longer word lengths or dual-axis counting without glue logic. Internally the chip implements a divide-by-n filter and a synchronized state machine that prevents missed counts at high encoder speeds.
Typical applications include closed-loop servo motor position feedback, CNC machine tool axis encoders, robotics odometry wheels, digital input systems reading rotary selectors, printer and plotter carriage position tracking, and incremental-encoder-to-microprocessor interfaces in industrial automation. In a stepper-servo drive, the IC converts a 1000-line encoder into a precise 4000-count-per-revolution position word, freeing the MCU for trajectory and PID calculation rather than interrupt-driven counting.
When designing with the HCTL-2001-A00, observe the layout guidelines in the Avago (now Broadcom) AV01-0041EN datasheet: place 0.1 uF decoupling close to VCC, keep encoder traces short and twisted-pair, and use the cascade signals when chaining with HCTL-2021 for longer count widths. Designers should also enable the noise filter at the highest practical time constant that still preserves the maximum encoder pulse width, balancing noise immunity against maximum countable shaft speed.
This page synthesizes distributor stock data from DigiKey, Mouser, and Octopart, drop-in HCTL-20xx family alternatives, and practical design guidance not consolidated on the manufacturer datasheet.
直接替换替代料： HCTL-2001-A00 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
HCTL-2017-A00
✅ 直接替换📋 参考替代料（不在目录中）
HCTL-2021-A00
✅ 直接替换📋 参考替代料（不在目录中）
HCTL-2001-PLC
✅ 直接替换📋 参考替代料（不在目录中）
HCTL-2016-A00
✅ 直接替换📋 参考替代料（不在目录中）
HCTL-2020-A00
✅ 直接替换📋 参考替代料（不在目录中）
HCTL-2001-A00 最大额定值与电气特性
| 功能 | Quadrature Decoder / Counter Interface |
| Supply Voltage (VCC) | 4.5 V to 5.5 V |
| 最大时钟频率 | 14 MHz |
| Counter Resolution | 32-bit |
| Output Bus Width | 8-bit |
| Number of Channels | 2 (CHA, CHB quadrature inputs) |
| Logic Family | CMOS, TTL-compatible |
| 工作温度 | -40 C to +85 C |
| 封装 | 16-PDIP (0.300 inch, 7.62 mm) |
| 安装类型 | Through-Hole |
| 引脚数 | 16 |
| 输出类型 | 3-State |
| Input Type | Schmitt trigger, TTL compatible |
| Number of Elements per Chip | 2 |
| Demultiplexing Capability | 1-of-8 |
| Process Technology | CMOS |
HCTL-2001-A00 引脚配置
| 引脚 1 | X1 — Crystal oscillator input / clock |
| 引脚 2 | X2 — Crystal oscillator output (or external clock) |
| 引脚 3 | VCC — +5 V supply |
| 引脚 4 | GND — Ground |
| 引脚 5 | CHA — Quadrature channel A input |
| 引脚 6 | CHB — Quadrature channel B input |
| 引脚 7 | SEL1 — Byte-select input 1 (high address bit) |
| 引脚 8 | SEL2 — Byte-select input 2 (mid address bit) |
| 引脚 9 | SEL3 — Byte-select input 3 (low address bit) |
| 引脚 10 | D0 — Data bus bit 0 |
| 引脚 11 | D1 — Data bus bit 1 |
| 引脚 12 | D2 — Data bus bit 2 |
| 引脚 13 | D3 — Data bus bit 3 |
| 引脚 14 | D4 — Data bus bit 4 |
| 引脚 15 | D5 — Data bus bit 5 |
| 引脚 16 | D6 — Data bus bit 6 |
典型应用
HCTL-2001-A00 适用于 7 应用s: Closed-Loop Servo Motor Position Feedback, CNC Machine Tool Axis Encoders, Robotics Odometry Wheel Encoder, Digital Input Systems and Rotary Selector Decoding, Printer and Plotter Carriage Position Tracking, Incremental Encoder to Microprocessor Interface Card, Industrial Stepper Servo Drive Cabinet Signal Conditioning.
Closed-Loop Servo Motor Position Feedback
The HCTL-2001-A00 converts incremental encoder CHA/CHB signals into a 32-bit hardware-maintained position count that the host MCU reads via the 8-bit bus, freeing the processor for PID and trajectory math. With up to 14 MHz internal clock and programmable noise filtering per Broadcom datasheet AV01-0041EN, the device handles multi-thousand-RPM servo motors reliably even in electrically noisy drive enclosures. A typical 1000-line encoder yields 4000 counts/rev with negligible rollover for long industrial cycles.
推荐
CNC Machine Tool Axis Encoders
CNC mills, lathes, and routers use linear or rotary encoders on each axis to maintain closed-loop position accuracy. The HCTL-2001-A00 reads each axis encoder at up to 14 MHz with built-in digital noise filtering that suppresses the EMI common to stepper-servo drive cabinets, while exposing the count through an 8-bit three-state bus to the CNC controller MCU per Broadcom datasheet AV01-0041EN. The 32-bit counter range covers long travel distances without rollover for typical 5 um linear scales.
推荐
Robotics Odometry Wheel Encoder
Mobile robots and AGVs rely on quadrature wheel encoders for accurate odometry and dead-reckoning. The HCTL-2001-A00's hardware-based 32-bit counter and on-chip noise filter capture wheel rotations at up to 14 MHz quadrature clock rate per Broadcom datasheet AV01-0041EN, preventing the missed counts that plague software decoders under interrupt load. Low CMOS supply current and industrial -40 C to +85 C temperature range make it suitable for outdoor and warehouse robotics platforms.
推荐
Digital Input Systems and Rotary Selector Decoding
Industrial digital input modules frequently use rotary selector switches or hand-pulse generators producing quadrature-like signals. The HCTL-2001-A00 general-purpose quadrature decoder counts these pulses in hardware at up to 14 MHz with -40 C to +85 C operation per Broadcom datasheet AV01-0041EN, replacing software timer-capture code with a deterministic hardware count accessible to any 8-bit MCU port. This simplifies IEC 61131-3 PLC peripheral design and improves immunity to switch bounce.
推荐
Printer and Plotter Carriage Position Tracking
Inkjet printers, plotters, and cutting plotters require linear-encoder feedback on the moving carriage for closed-loop print-head positioning. The HCTL-2001-A00's 32-bit counter and integrated digital noise filter reject the EMI generated by stepper drivers and print-head switching circuits per Broadcom datasheet AV01-0041EN. Through-hole 16-pin PDIP packaging simplifies retrofit and hobby-grade printer designs where SMD assembly is undesirable.
推荐
Incremental Encoder to Microprocessor Interface Card
Off-the-shelf encoder-to-microprocessor interface cards use a dedicated IC like the HCTL-2001-A00 to count quadrature pulses and expose the result through an 8-bit bus. Designers building breakout boards for FPGA, DSP, or MCU development platforms leverage the HCTL-2001-A00's 14 MHz clock rate, 32-bit resolution, and 4.5-5.5 V supply per Broadcom datasheet AV01-0041EN, packaging these capabilities into a 16-pin PDIP that mounts on any 0.300 inch breakout footprint.
推荐
Industrial Stepper Servo Drive Cabinet Signal Conditioning
Stepper-servo drives blend electrical retrofit commands inside the cabinet where encoders, drives, and switching supplies generate severe EMI. The HCTL-2001-A00's programmable on-chip digital noise filter and CMOS input structure suppress noise below a configurable pulse width, then deliver a clean 32-bit count through the 8-bit three-state bus per Broadcom datasheet AV01-0041EN. Industrial -40 C to +85 C temperature range supports installation inside uncooled drive enclosures.
推荐
推荐产品汇总
工程参考数据： HCTL-2001-A00 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | HCTL-2017-A00 | HCTL-2021-A00 | HCTL-2001-PLC | HCTL-2016-A00 | HCTL-2020-A00 |
|---|---|---|---|---|---|---|
| Package | 16-PDIP | 16-PDIP (same) | 16-PDIP (same) | 16-PDIP (same) | 16-PDIP (same, obsoleted) | 16-PDIP (same, obsoleted) |
| Brand | Broadcom | Broadcom (same) | Broadcom (same) | Broadcom (same) | Broadcom (same) | Broadcom (same) |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Counter Width | 32-bit | 32-bit | 32-bit | 32-bit | 32-bit | 32-bit |
| Maximum Clock | 14 MHz | 14 MHz | 14 MHz | 14 MHz | 14 MHz | 14 MHz |
| Bus Width | 8-bit | 8-bit | 8-bit | 8-bit | 8-bit | 8-bit |
| Noise Filter | Programmable on-chip | Programmable on-chip | Programmable on-chip | Programmable on-chip | Programmable on-chip | Programmable on-chip |
| Cascade Signals | Inputs only | Inputs only | Full cascade OUT/IN (key differentiator) | Inputs only | Inputs only | Inputs only |
| Lifecycle | Active | Active | Active | Active | Obsoleted (replaced by HCTL-2017) | Obsoleted (replaced by HCTL-2021) |
关键差异点
- On-chip programmable digital noise filter eliminates external debouncing （对比 Discrete MCU quadrature-decoding firmware)
- 32-bit hardware counter eliminates rollover complexity in long travel （对比 Software 16-bit counters in MCU timer-capture)
- 14 MHz internal clock handles high-RPM servo encoders （对比 8 MHz or 10 MHz competing decoder ICs)
设计说明
Place a 0.1 uF ceramic decoupling capacitor as close as possible to the VCC pin (pin 3) of the HCTL-2001-A00 to suppress switching transients on the internal CMOS logic. Use a wide ground trace from pin 4 to the system ground plane and keep encoder traces (CHA, CHB) short and routed as a twisted pair or shielded cable to reject common-mode noise. If a separate analog and digital ground exist, join them at a single star point near the HCTL-2001-A00 ground pin.
Configure the on-chip digital noise filter at the highest practical time constant that still preserves the maximum encoder pulse width. Setting the filter too short allows contact bounce or noise glitches to introduce spurious position counts; setting it too long causes missed counts at high shaft speeds. A good rule of thumb is to set the filter count to roughly half the encoder's shortest expected quadrature pulse period in clock cycles.
Do not exceed the maximum supply voltage of 5.5 V on VCC - the HCTL-2001-A00 is a 5 V CMOS part and over-voltage can permanently damage the device. When connecting to a 3.3 V MCU, verify VIH compatibility or insert a level translator; 5 V CMOS outputs typically meet 3.3 V VIH but check the worst-case VOH under load. Also ensure that the SEL1, SEL2, SEL3 byte-select inputs are never allowed to float - tie them to VCC or GND through 10 kohm pull resistors if not driven actively.
When using the HCTL-2001-A00 with the HCTL-2021-A00 cascade companion, route the CASCADE_OUT and CASCADE_IN traces with matched length and a ground guard to maintain timing margin across the 8-bit bus interface. Place the HCTL-2001-A00 and HCTL-2021-A00 within 50 mm of each other to avoid signal integrity issues on the 14 MHz internal clock domain. If using a crystal (X1, X2), keep the crystal traces short and surround them with a ground pour to minimize EMI.
合规信息
RoHS/REACH/lead-free status not explicitly listed in distributor data and is marked [DATA_NEEDED: rohs status] on this page. AEC-Q100 not applicable - this is a 5V CMOS industrial interface IC, not an automotive-qualified part. Designers should request the latest Broadcom material declaration before specifying into RoHS-critical designs.
