PDSP16318A

·  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 PDSP16318A 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 PDSP16318A 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.