Infineon Technologies CY8C20636A-24LTXIT

Overview

CY8C20636A-24LTXIT from Cypress Semiconductor is a PSoC® 1 mixed-signal array IC configured with the TS2000 Haptics User Module for tactile feedback generation in capacitive touch interfaces. It integrates two 16-bit timers (Timer0 and Timer2) to generate 23 kHz PWM output and 5-ms haptic update intervals, operates at up to 3.3 V, and supports up to 14 Immersion TouchSense 2000 haptic effects including Strong Click and Sharp Click variants for consumer handheld devices.

For engineers reviewing the CY8C20636A-24LTXIT datasheet, CY8C20636A-24LTXIT pinout, CY8C20636A-24LTXIT application, or CY8C20636A-24LTXIT equivalent, key selection criteria include PWM timing resource allocation, actuator drive interface (PWM/SHDN# pin assignment), flash/RAM usage trade-offs per enabled effect, and compatibility with CapSense® button firmware stacks in space-constrained embedded UI designs.

Technical Context

The CY8C20636A-24LTXIT implements haptic feedback entirely in firmware using two dedicated 16-bit timers: Timer_PWM generates ~23 kHz PWM output (90-cycle ISR duration), while Timer_TMR triggers haptic effect updates every 5 ms ±10%. No hardware digital blocks are consumed-unlike CY8C22x45H variants-making it suitable for resource-limited PSoC 1 designs requiring tactile response without sacrificing digital logic resources.

It requires external actuator drive circuitry (e.g., TPA6205A amplifier) and supports only two validated actuators: Sanyo NRS-2574i (≤150 g devices) and Jinlong Z6DL2A017000B (>150 g). The module does not block CPU execution during effect playback, and CPU load is zero when no haptic effect is active.

Key Specifications

Pinout & Package

Package: 24-pin QFN (4 mm × 4 mm, 0.5 mm pitch), RoHS-compliant, lead-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar haptics controller applications.

Compared with CY8C20636A-24LTXIT, CY8C22345H reduces CPU loading via hardware acceleration but sacrifices digital logic resources, while CY8C20446H offers identical haptics functionality in a larger package with expanded I/O-neither is pin-compatible, and both require PCB redesign.

Availability

CY8C20636A-24LTXIT is available at Aetrix Electronics and suitable for smartphone touch UIs, wearable fitness trackers, industrial HMI panels, and medical handheld scanners requiring stable component supply and long-term PSoC 1 lifecycle support.

Supply support for CY8C20636A-24LTXIT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Cypress Semiconductor (now part of Infineon Technologies) designs programmable mixed-signal ICs for embedded control, with focus on CapSense®, PSoC®, and USB connectivity solutions.

The CY8C20xx6A series targets cost-sensitive, low-power capacitive touch interfaces requiring integrated haptics, sensor processing, and system control in a single chip-designed specifically for consumer and industrial UIs where tactile feedback improves usability and reliability.

FAQ

What actuator drive circuit is required for CY8C20636A-24LTXIT?

The device requires an external amplifier such as the TPA6205A driven from 3.3 V, with PWM output routed to the actuator's "–IN" pin and SHDN# controlled via a separate GPIO. Only two actuators are validated: Sanyo NRS-2574i (≤150 g) and Jinlong Z6DL2A017000B (>150 g). No internal driver is present-the IC provides only timing-critical firmware signals.

Can CY8C20636A-24LTXIT generate haptic effects without CPU intervention during playback?

No-effects are generated entirely in firmware using two ISRs (Timer_PWM and Timer_TMR), but the CPU remains fully operational. The ISRs execute only during effect playback (90 cycles per PWM interrupt, ~23 kHz), and no background polling or blocking calls are required. When idle, CPU load is zero.

How does flash usage scale with enabled haptic effects?

Flash usage ranges from 15,922 bytes (worst case, all 14 effects enabled) down to ~12,400 bytes (4 effects enabled), depending on compiler optimization and effect selection. Disabling unused effects directly reduces compiled hex size-each effect contributes ~250–400 bytes. Effect data is stored in flash and loaded into RAM at runtime.

Is the 5-ms haptic update interval adjustable?

Yes-the EffectUpdateDivider parameter allows tuning within ±10% (4.5–5.5 ms) by adjusting the timer reload value relative to the selected FClock (5.6–13 MHz). This maintains synchronization with Immersion's TouchSense 2000 waveform timing model while accommodating clock source tolerances and system-level timing constraints.