HEF4017B

General description

The HEF4017B is a 5-stage Johnson decade counter with ten spike-free decoded active HIGH outputs (O₀ to O₉ ), an active LOW output from the most significant flip-flop (O_5-9 ), active HIGH and active LOW clock inputs (CP₀ , CP₁ ) and an overriding asynchronous master reset input (MR).

The counter is advanced by either a LOW to HIGH transition at CP₀ while CP₁ is LOW or a HIGH to LOW transition at CP₁ while CP₀ is HIGH (see also function table).

When cascading counters, the O_5-9 output, which is LOW while the counter is in states 5, 6, 7, 8 and 9, can be used to drive the CP₀ input of the next counter.

A HIGH on MR resets the counter to zero (O₀ = O_5-9 = HIGH; O₁ to O₉ = LOW) independent of the clock inputs (CP₀ , CP₁ ).

Automatic code correction of the counter is provided by an internal circuit: following any illegal code the counter returns to a proper counting mode within 11 clock pulses.

Schmitt-trigger action in the clock input makes the circuit highly tolerant to slower clock rise and fall times.

Features

• Pin compatibility to the PCA82C200 stand-alone CAN controller
• Electrical compatibility to the PCA82C200 stand-alone CAN controller
• Software-compatibility mode to the PCA82C200 (BasicCAN mode is default)
• Extended receive buffer (64-byte FIFO)
• CAN 2.0B protocol compatibility (extended frame passive in PCA82C200 compatibility mode)
• Supports 11-bit identifier as well as 29-bit identifier
• Bit rates up to 1 Mbits/s
• PeliCAN mode extensions:
  - Error counters with read/write access
  - Programmable error warning limit
  - Last error code register
  - Error interrupt for each CAN-bus error
  - Arbitration lost interrupt with detailed bit position
  - Single-shot transmission (no re-transmission)
  - Listen only mode (no acknowledge, no active error flags)
  - Hot plugging support (software driven bit rate detection)
  - Acceptance filter extension (4-byte code, 4-byte mask)
  - Reception of ?own? messages (self reception request)
• 24 MHz clock frequency
• Interfaces to a variety of microprocessors
• Programmable CAN output driver configuration
• Extended ambient temperature range (-40 to +125 °C).

Products/packages

Pricing/ordering/availability

Applications

• Telecom equipment
• Portable instruments
• Point-of-sale terminals.

Parametrics/similar products

Similar products

HEF4017B links to the similar products page containing an overview of products that are similar in function or related to the type number(s) as listed on this page. The similar products page includes products from the same catalog tree(s), relevant selection guides and products from the same functional category.

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