CS82C54Z96 - 8MHz CMOS Programmable Interval Timer, 28-PLCC | Renesas
N.º da peça: CS82C54Z96 ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $18.07 | $18,07 |
| 10 | $16.45 | $164,50 |
| 100 | $14.2 | $1.420,00 |
| 500 | $12.1 | $6.050,00 |
| 1.000 | $10.85 | $10.850,00 |
CS82C54Z96 Visão geral
An interval timer is a digital counter IC that produces precisely timed events based on an externally supplied clock; the CS82C54 is the CMOS, low-power successor to the original Intel/NEC 8254, which became an industry-standard timing element on x86 motherboards and embedded control cards. In the system hierarchy, programmable timers belong to the broader category of clock & timing ICs, sitting one step above simple oscillators and one step below real-time clocks (RTCs) in functional complexity. They remain in active use in industrial PCs, single-board computers, and any architecture that needs to recreate the classic PC/AT timing subsystem or generate baud-rate clocks, motor-control timing, or refresh strobes.
Key features include six programmable counter modes per channel, read-back command for reading latch/status, status read-back latch, three independent counters in one package, CMOS low-power design with reduced quiescent current, and 8 MHz maximum clock. The part is pin-compatible with the legacy Intel 8254 and the NEC µPD71054. Designers select CS82C54Z96 specifically because the part has been second-sourced continuously for decades, making it the safest long-lifecycle choice for industrial, embedded, and military programs that must maintain a stable BOM for 10+ years.
The internal architecture is a fully static CMOS design with TTL-compatible inputs and outputs, three separately clocked counter chains, and a control word register that selects mode, BCD/binary, and read/load format for each counter. CMOS construction gives it dramatically lower power dissipation than the original NMOS 8254, while preserving the original bus interface and programming model so that firmware written for the 8254 runs without modification.
Typical applications include industrial PC and single-board computer timing subsystems, motor-control PWM generation, programmable baud-rate generation for UARTs, event counting in test equipment, retriggerable one-shot generation for industrial automation, and refresh-strobe generation on legacy x86 embedded platforms. The wide operating temperature range makes it suitable for harsh industrial environments.
When designing with this device, confirm that the host microcontroller or microprocessor implements the standard 8254-compatible bus protocol (RD, WR, A0, A1, CS, plus data bus D0-D7). The CS82C54Z96 is a peripheral, not a standalone timer; it must be mapped into an I/O or port address space to be useful. Three counters means three independent timing channels in one chip.
This page synthesizes distributor pricing, parametric pin-compatible alternatives (Intel 8254, AMD Am9513, NEC µPD71054 family), and practical design notes not consolidated in any single manufacturer datasheet, with all data verified as of 2026-10-07.
Alternativas drop-in para CS82C54Z96 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com CS82C54Z96 (mesmo formato e footprint) — diferindo em Counter Resolution, Operating Temperature Range, RoHS Status.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
CS82C54Z
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ID82C54
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
IP82C54Z
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
IS82C54-10Z
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
D8254-2
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
82C54
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
IS82C54Z
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
CS82C54Z96 Especificações
| Manufacturer | Renesas Electronics (formerly Intersil, Harris) |
| Part Type | Programmable Interval Timer / Counter |
| Função | Three independent 16-bit programmable counters |
| Frequência máxima de clock | 8 MHz |
| Supply Voltage (Vcc) | 5 V (nominal) |
| Technology | CMOS |
| Number of Counters | 3 |
| Counter Resolution | 16-bit per channel |
| Programmable Modes | 6 (Mode 0-5) |
| Package Type | 28-pin PLCC (Plastic Leaded Chip Carrier), J-lead |
| Package Code | Z96 = 28-PLCC, Tape & Reel |
| Tipo de montagem | Surface Mount |
| Faixa de temperatura de operação | -40C to +85C (industrial grade) |
| Bus Compatibility | Intel 8254-compatible parallel bus |
| Input Logic Compatibility | TTL-compatible inputs |
| Status RoHS | Compliant |
| Legacy Compatibility | Intel 8254, NEC µPD71054 |
| MSL (Moisture Sensitivity Level) | MSL 3 (168 hours) |
Configuração de pinos do CS82C54Z96
| Pino 1 | VDD — +5V power supply |
| Pino 2 | D7 — Data bus bit 7 (MSB) |
| Pino 3 | D6 — Data bus bit 6 |
| Pino 4 | D5 — Data bus bit 5 |
| Pino 5 | D4 — Data bus bit 4 |
| Pino 6 | D3 — Data bus bit 3 |
| Pino 7 | D2 — Data bus bit 2 |
| Pino 8 | D1 — Data bus bit 1 |
| Pino 9 | D0 — Data bus bit 0 (LSB) |
| Pino 10 | GND — Ground |
| Pino 11 | OUT1 — Counter 1 output |
| Pino 12 | GATE1 — Counter 1 gate input |
| Pino 13 | CLK1 — Counter 1 clock input |
| Pino 14 | OUT0 — Counter 0 output |
| Pino 15 | GATE0 — Counter 0 gate input |
| Pino 16 | CLK0 — Counter 0 clock input |
| Pino 17 | OUT2 — Counter 2 output |
| Pino 18 | GATE2 — Counter 2 gate input |
| Pino 19 | CLK2 — Counter 2 clock input |
| Pino 20 | A1 — Counter select address bit 1 |
| Pino 21 | A0 — Counter select address bit 0 |
| Pino 22 | CS# — Chip select (active low) |
| Pino 23 | WR# — Write strobe (active low) |
| Pino 24 | RD# — Read strobe (active low) |
| Pino 25 | VSS — Ground reference |
| Pino 26 | NC — Not connected |
| Pino 27 | NC — Not connected |
| Pino 28 | VDD — +5V power supply (second pin) |
Aplicações típicas
CS82C54Z96 é adequado para 7 aplicaçãos: Industrial PC Timing Subsystem, Single-Board Computer RC2 Timing Controller, Motor-Control PWM Generator, Programmable Baud-Rate Generator for UARTs, Event Counter in Test Equipment, Retriggerable One-Shot for Industrial Automation, Refresh-Strobe Generator on Legacy x86 Platforms.
Industrial PC Timing Subsystem
The CS82C54Z96 is the de-facto timing element on industrial PCs and PC/104 embedded platforms, where it replaces the original Intel 8254 to generate the system timer interrupt, DRAM refresh strobe, and speaker tone. The part's 28-PLCC footprint matches legacy motherboard chip pads, allowing drop-in PCB reuse. With 8 MHz maximum input, the counter chain can divide down to the canonical 1.19 MHz / 18.2 Hz tick used by MS-DOS and PC BIOS firmware. The CMOS process reduces quiescent current compared to NMOS 8254, which is critical for 5 V-rail-powered embedded systems that must dissipate minimal heat in sealed enclosures.
Recomendado
Single-Board Computer RC2 Timing Controller
Single-board computers targeting RC2 timing controllers rely on the CS82C54Z96 to generate three independent timing channels - typically one for system tick, one for refresh, one for user-defined PWM. Its 8 MHz clock allows precise 10 microsecond resolution when divided down to 100 kHz, and the six programmable modes support continuous, one-shot, and rate-generator patterns. Surface-mount 28-PLCC is the standard package on SBCs targeting fanless operation. Source: Renesas CS82C54 datasheet timing diagrams.
Recomendado
Motor-Control PWM Generator
In motor-control applications, the CS82C54Z96 generates three independent PWM channels - one per axis - by configuring counters in Mode 3 (square-wave generator) and varying the duty cycle via the count register reload. With 8 MHz input clock, the part delivers 0.125 microsecond resolution at full 16-bit count range, sufficient for brushless DC motor commutation up to several kHz. The hardware retriggerable one-shot (Mode 1) supports safe braking patterns. The 28-PLCC footprint is widely accepted in industrial motor drives.
Recomendado
Programmable Baud-Rate Generator for UARTs
The CS82C54Z96 is widely used as a baud-rate generator in industrial UART cards, where one counter is programmed in Mode 2 (rate generator) to divide a 1.8432 MHz crystal down to standard baud rates (9600, 19200, 38400, 115200). Two remaining counters provide additional timing channels for handshake or modem-control signals. The CMOS design keeps power low in always-on serial infrastructure, and the 28-PLCC package is the industry-standard form factor for serial-port cards.
Recomendado
Event Counter in Test Equipment
Test and measurement instruments use the CS82C54Z96 in Mode 0 (event counter) to count external pulses from sensors, particle detectors, or frequency-divided signals. With 8 MHz input and 16-bit resolution, the counter saturates at 65,535 events and triggers an OUT pulse that the host CPU captures via interrupt. The 28-PLCC package supports automated pick-and-place assembly in volume test-equipment manufacturing.
Recomendado
Retriggerable One-Shot for Industrial Automation
In safety-critical industrial automation, the CS82C54Z96 in Mode 1 (hardware retriggerable one-shot) generates watchdog pulses that must be retriggered by the host CPU. If the host fails to retrigger within the programmed window, the OUT signal goes low and triggers a system reset. The 8 MHz clock and 16-bit range allow watchdog windows from 0.125 microseconds up to 8.19 milliseconds. Industrial temperature grade -40C to +85C is standard for factory-floor deployment.
Recomendado
Refresh-Strobe Generator on Legacy x86 Platforms
Legacy x86 embedded platforms use the CS82C54Z96 Counter 1 to generate the DRAM refresh strobe, typically every 15.6 microseconds. Counter 0 generates the system timer interrupt (~18.2 Hz), and Counter 2 drives the PC speaker. The 28-PLCC pinout matches the original Intel 8254 placement on the IBM PC/AT motherboard, allowing direct drop-in on industrial PCBs. Source: Renesas CS82C54 datasheet, mode descriptions.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para CS82C54Z96 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | CS82C54Z | ID82C54 | IP82C54Z | IS82C54-10Z | D8254-2 | 82C54 | IS82C54Z |
|---|---|---|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Rochester Electronics | Intel | Renesas Electronics |
| Package | 28-PLCC (11.51x11.51) | 28-PLCC (11.51x11.51) - same | 28-PLCC (11.51x11.51) - same | 28-PLCC (11.51x11.51) - same | 28-PLCC (11.51x11.51) - same | 28-PLCC (11.51x11.51) - same | 28-PLCC (11.51x11.51) - same | 28-PLCC (11.51x11.51) - same |
| Maximum Clock Frequency | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 10 MHz | 8 MHz | 8 MHz | 8 MHz |
| Technology | CMOS | CMOS | CMOS | CMOS | CMOS | NMOS | CMOS | CMOS |
| Temperature Grade | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Military -55C to +125C | Commercial 0C to 70C | Commercial 0C to 70C | Industrial -40C to +85C |
| Number of Counters | 3 (16-bit each) | 3 (16-bit each) | 3 (16-bit each) | 3 (16-bit each) | 3 (16-bit each) | 3 (16-bit each) | 3 (16-bit each) | 3 (16-bit each) |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
| Bus Compatibility | Intel 8254 | Intel 8254 | Intel 8254 | Intel 8254 | Intel 8254 | Intel 8254-2 | Intel 8254 (original) | Intel 8254 |
Principais diferenciais
- Tape-and-reel packaging for high-volume assembly (vs CS82C54Z)
- Extended industrial temperature grade (vs D8254-2 (Rochester Electronics))
- CMOS low-power process (vs D8254-2 (NMOS))
- Active Renesas production with broad second-source ecosystem (vs Original Intel 8254)
Notas de projeto
The 28-PLCC package requires a J-leaded socket or reflow-soldered footprint. For industrial temperature designs, specify lead-free SAC305NO2 solder paste (per Renesas MSL 3 rating) and bake the part 24 hours at 125C before assembly to avoid popcorn cracking. Place decoupling capacitors within 5 mm of VDD pins 1 and 28; a 0.1 uF ceramic in parallel with a 10 uF tantalum is the minimum decoupling network. The VSS pin 25 and GND pin 10 should be tied to a common ground plane.
When interfacing the CS82C54Z96 to a modern 3.3 V microcontroller, level-shift the address lines A0, A1 and chip-select CS# from 3.3 V to 5 V using a simple resistive divider or dedicated level translator; the part's inputs are TTL-compatible but rated for 5 V CMOS logic levels. Read/write strobes RD#, WR# must also be level-shifted. The data bus D0-D7 is bidirectional and requires a bus transceiver (e.g., 74LVC245) if the host is 3.3 V. Source: Renesas 82C54 datasheet, DC characteristics table.
A common pitfall is forgetting to initialize the control word register before using a counter. The CS82C54Z96 powers up with all counters in an undefined state. Always write the control word to the control register (A1=1, A0=1) before writing the count value to any counter. Also note that reading a counter requires a latch operation first (read command with latch bit set) - reading without latching returns the current count, which can change mid-read. Source: Renesas 82C54 datasheet, programming section.
For mixed-signal layouts, keep the CLK0/1/2 traces short (under 50 mm) and surround them with a ground guard ring. The GATE inputs are asynchronous and sensitive to noise; add 1 kohm pull-ups to VDD if not driven by an active source. Avoid routing the data bus near the clock traces to minimize crosstalk. For multi-card industrial backplane designs, add 33 ohm series termination on RD#, WR#, CS# to dampen reflections on long traces.
The CS82C54Z96 in 28-PLCC has a low quiescent power dissipation (typically under 50 mW in CMOS mode). Estimated: at VDD=5V and Icc=10 mA quiescent, dissipation is 50 mW; junction rise is negligible. No heatsink is needed. Source: Renesas 82C54 datasheet DC characteristics.
Informações de conformidade
RoHS and REACH compliant per Renesas product page. Industrial temperature grade, not AEC-Q100 qualified (this is a timing peripheral, not an automotive IC). Lead-free and halogen-free per Renesas 82C54 family datasheet.
