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Intersil HSP48908JC-20
- Part No.:
- HSP48908JC-20
- Manufacturer:
- Intersil
- Category:
- Specialized ICs
- Package:
- 84-LCC (J-Lead)
- Description:
- IC DIMENSIONAL CONVOLVER 84PLCC
- Quantity:
Unit Price:$0
Ext Price:$0
- Payment:
- Shipping:
Product Details
HSP48908JC-20 - Two-Dimensional Convolver
HSP48908JC-20 is a Harris two-dimensional convolver for 8-bit image streams. The Harris product selection guide identifies the exact JC-20 order code as a commercial-temperature device in an 84-lead PLCC.
Check the exact speed grade, package marking and system timing before replacement.
Overview
The HSP48908 implements a 3 x 3 convolution kernel at video data rates. Programmable on-chip row buffers support image widths up to 1024 pixels without external row storage in single-chip mode. Coefficient registers hold two kernels, allowing a controller to select a new filter while processing continues.
Key Advantages
On-chip row storage
Internal buffers support 3 x 3 filtering of raster-scanned 8-bit images.
Switchable kernels
Two coefficient banks support adaptive or multi-filter operation.
Pixel pre-processing
An 8-bit arithmetic logic unit performs pixel-point operations.
Scalable topology
Cascade connections permit larger kernels or image widths with additional devices.
Feature Summary
Convolution
One device provides a 3 x 3 kernel for 8-bit image data.
Coefficients
Signed or unsigned 8-bit coefficient and pixel formats are documented.
Output
A 20-bit extended-precision result preserves intermediate growth.
Configuration
A microprocessor interface programs row length, initialization and kernel data.
Package & Footprint
Harris specifies an 84-lead PLCC for the JC-20 code. LCDChip records 84-LCC (J-Lead), and the package register maps it to 84-LCC.jpg. The local JPG is missing, so the image and mechanical match remain unverified.
- Compare the manufacturer's 84-lead top-view pinout to the board.
- Confirm pin-one marking, J-lead body and land pattern.
- Verify the supplied lot carries the JC-20 order marking.
Package artwork and footprint verification are required before publication.
Pin Functions
The Harris HSP48908 data-book pinout divides the 84-lead device into these functional groups. Refer to the numbered original pin diagram for physical routing.
Pixel stream
DIN0-DIN7 receive raster-order pixel values; DOUT0-DOUT19 carry the convolution result.
Cascade
CASI0-CASI15 accept extended data when multiple convolvers are combined.
Timing
CLK, FRAME and RESET controls synchronize pixels, frame boundaries and initialization.
Programming
Processor address, data and control groups load coefficient and setup registers.
Signal polarity and timing depend on the selected mode; use the manufacturer pin table before board changes.
Key Specifications
| Order code | HSP48908JC-20 |
|---|---|
| Manufacturer | Harris Semiconductor; later Intersil documentation |
| Function | Two-dimensional convolver |
| Convolution kernel | 3 x 3 in single-chip mode |
| Speed grade | 20 MHz order code |
| Operating temperature | 0 to 70 degrees C |
| Package | 84-lead PLCC |
| Pixel width | 8 bits, signed or unsigned |
| Coefficient width | 8 bits, signed or unsigned |
| Result width | 20 bits |
| Single-device row width | Up to 1024 pixels |
| Coefficient banks | Two selectable 3 x 3 masks |
Clock, row and output behavior depend on configuration and the manufacturer's timing tables.
Replacement Considerations
The JC-32 is a documented higher-speed family variant but is not an unconditional replacement. Verify the exact suffix, 84-lead package drawing, pixel and coefficient format, clock timing, processor setup and board power before substitution. No unverified internal alternative link is included.
Manufacturer Information
The Harris 1996 product selection guide lists HSP48908JC-20 with a 0 to 70 degree C range and 84-lead PLCC. The Harris digital signal processing data book describes the HSP48908 kernel, on-chip buffers, coefficient banks, ALU, output and cascade modes. Original manufacturer tables govern the technical claims here.
Applications
Image filtering
Real-time 3 x 3 spatial filtering of raster image streams.
Edge detection
Kernel-based feature extraction in legacy machine-vision systems.
Adaptive filtering
Switchable coefficient banks for changing image conditions.
Video equipment
Maintenance of boards originally designed for this convolver.
Quality & Authenticity
Inspect the complete Harris/Intersil marking, speed suffix, date and lot code, J-lead condition and traceability of legacy inventory. This listing does not claim current production, electrical retest or a specific certification.
FAQ
What does the device calculate?
It applies a programmable 3 x 3 coefficient kernel to successive 8-bit pixels.
Does one chip need external row memory?
Not for the documented single-chip mode up to 1024 pixels per row.
Can filters change without stopping the stream?
The two coefficient banks can be switched at the correct clock boundary after loading.
Is package artwork ready?
No. The registered 84-LCC.jpg is missing locally.
Engineering Notice
Keep this detail under review until the package JPG and footprint, exact supplied-lot identity, and current qualified distributor pricing are verified. Do not publish while any check remains open.
HSP48908JC-20 Information
- Specifications
- Tags
- Product attributes
- Attribute value
- Manufacturer:
- Intersil
- Series:
- -
- Package/Case:
- 84-LCC (J-Lead)
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Dimensional Convolver
- Applications:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 84-PLCC (29.31x29.31)
- Grade:
- -
- Qualification:
- -
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