PDSP16318

·  Full 20MHz Throughout in FFT Applications
·  Four Independent 16-bit I/O Ports
·  20-bit Addition or Accumulation
·  Fully Compatible with PDSP16112 Complex Multiplier
·  On Chip Shift Structures for Result Scaling
·  Overflow Detection
·  Independent Three-State Outputs and Clock Enables for 2 Port 20MHz Operation
·  1.4 micron CMOS
·  500mW Maximum Power Dissipation
·  100 CQFP package

· High speed Complex FFT or DFTs
· Complex Finite Impulse Response (FIR) Filtering
· Complex Conjugation
· Complex Correlation/Convolution

Supply voltage V_CC                               -0.5V to 7.0V
Input voltage V_IN                        -0.9V to V_CC +0.9V
Output voltage V_OUT                  -0.9V to V_CC +0.9V
Clamp diode current per pin Ik (see Note 2)    18mA
Static discharge voltage (HMB) V_STAT               500V
Storage temperature range T_S         -65 to +150
Ambient temperature with
power applied T_amb
Industrial                                           -40 to +85
Military                                             -55 to +125
Junction temperature                                      150
Package power dissipation P_TOT                1000mW
NOTES
1. Exceeding these ratings may cause permanent damage.Functional operation under these conditions is not implied.
2. Maximum dissipation or 1 second should not be exceeded, onlyone output to be tested at any one time.
3. Exposure to absolute maximum ratings for extended periods may affect device reliability.

The PDSP16318/A contains two independent 20-bit Adder/Subtractors combined with accumulator registers and shift structures.  The four port architecture permits full 20MHz throughout in FFT and filter applications.

Two PDSP16318As combined with a single PDSP16112A Complex Multiplier provide a complete arithmetic solution for a Radix 2 DIT FFT Butterfly.  A new complex Butterfly result can be generated every 50ns allowing 1K complex FFTs to be executed in 256s.