1–50
Chapter 1: DC and Switching Characteristics for Stratix IV Devices
Switching Characteristics
Stratix IV Device Handbook
March 2014
Altera Corporation
Volume 4: Device Datasheet and Addendum
DSP Block Specifications
Table 1–35 lists the Stratix IV DSP block performance specifications.
Table 1–35. Block Performance Specifications for Stratix IV DSP Devices
(1)Mode
Resources
Used
Performance
Unit
Number of
Multipliers
–1 Industrial
and–2/–2×
Commercial/
Industrial
Speed Grade
–3
Commercial
Speed
Grade
–3
Industrial
Speed
Grade
–4
Commercial
Speed
Grade
–4
Industrial
Speed
Grade
9×9-bit multiplier (A, C, E, G)
(2)1
520
460
400
MHz
9×9-bit multiplier (B, D, F,
H) (2)1
520
460
400
MHz
12×12-bit multiplier (A,
E) (3)1
540
500
440
MHz
12×12-bit multiplier (B, D, F, H)
(3)1
540
500
440
430
MHz
18×18-bit multiplier
1
600
550
480
MHz
36×36-bit multiplier
1
480
440
380
MHz
18×18-bit multiply accumulator
4
490
440
380
MHz
18×18-bit multiply adder
4
510
470
410
400
MHz
18×18-bit multiply adder-signed full
precision
2
490
450
440
390
MHz
18×18-bit multiply adder with
2
390
350
310
300
MHz
36-bit shift (32-bit data)
1
490
440
380
MHz
Double mode
1
480
440
380
370
MHz
(1) Maximum is for fully pipelined block with Round and Saturation disabled.
(2) The DSP block implements eight independent 9b9b multiplies using A, B, C, D for the top DSP half block and E, F, G, H for the bottom DSP half block
multipliers.
(3) The DSP block implements six independent 12b12b multiplies using A, B, D for the top DSP half block and E, F, H for the bottom DSP half block
multipliers.
(4) Maximum for loopback input registers disabled, Round and Saturation disabled, and pipeline and output registers enabled.