参数资料
型号: XC3S1400A-4FT256I
厂商: Xilinx Inc
文件页数: 73/132页
文件大小: 0K
描述: IC FPGA SPARTAN 3 256FTBGA
标准包装: 90
系列: Spartan®-3A
LAB/CLB数: 2816
逻辑元件/单元数: 25344
RAM 位总计: 589824
输入/输出数: 161
门数: 1400000
电源电压: 1.14 V ~ 1.26 V
安装类型: 表面贴装
工作温度: -40°C ~ 100°C
封装/外壳: 256-LBGA
供应商设备封装: 256-FTBGA
DC and Switching Characteristics
DS529-3 (v2.0) August 19, 2010
45
18 x 18 Embedded Multiplier Timing
Table 34: 18 x 18 Embedded Multiplier Timing
Symbol
Description
Speed Grade
Units
-5
-4
Min
Max
Min
Max
Combinatorial Delay
TMULT
Combinational multiplier propagation delay from the A and B inputs
to the P outputs, assuming 18-bit inputs and a 36-bit product
(AREG, BREG, and PREG registers unused)
–4.36
–4.88
ns
Clock-to-Output Times
TMSCKP_P
Clock-to-output delay from the active transition of the CLK input to
valid data appearing on the P outputs when using the PREG
register(2,3)
–0.84
–1.30
ns
TMSCKP_A
TMSCKP_B
Clock-to-output delay from the active transition of the CLK input to
valid data appearing on the P outputs when using either the AREG
or BREG register(2,4)
–4.44
–4.97
ns
Setup Times
TMSDCK_P
Data setup time at the A or B input before the active transition at the
CLK when using only the PREG output register (AREG, BREG
registers unused)(3)
3.56
–3.98
–ns
TMSDCK_A
Data setup time at the A input before the active transition at the CLK
when using the AREG input register(4)
0.00
–0.00
–ns
TMSDCK_B
Data setup time at the B input before the active transition at the CLK
when using the BREG input register(4)
0.00
–0.00
–ns
Hold Times
TMSCKD_P
Data hold time at the A or B input after the active transition at the
CLK when using only the PREG output register (AREG, BREG
registers unused)(3)
0.00
–0.00
–ns
TMSCKD_A
Data hold time at the A input after the active transition at the CLK
when using the AREG input register(4)
0.35
–0.45
–ns
TMSCKD_B
Data hold time at the B input after the active transition at the CLK
when using the BREG input register(4)
0.35
–0.45
–ns
Clock Frequency
FMULT
Internal operating frequency for a two-stage 18x18 multiplier using
the AREG and BREG input registers and the PREG output
register(1)
0280
0
250
MHz
Notes:
1.
Combinational delay is less and pipelined performance is higher when multiplying input data with less than 18 bits.
2.
The PREG register is typically used in both single-stage and two-stage pipelined multiplier implementations.
3.
The PREG register is typically used when inferring a single-stage multiplier.
4.
Input registers AREG or BREG are typically used when inferring a two-stage multiplier.
5.
The numbers in this table are based on the operating conditions set forth in Table 8.
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