OR3T125 Agere Systems, OR3T125 Datasheet

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OR3T125

Manufacturer Part Number
OR3T125
Description
3C and 3T Field-Programmable Gate Arrays
Manufacturer
Agere Systems
Datasheet

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June 1999
Table 1. ORCA Series 3 (3C and 3T) FPGAs
‡ The system gate counts range from a logic-only gate count to a gate count assuming 30% of the PFUs/SLICs being used as RAMs.
Features
The logic-only gate count includes each PFU/SLIC (counted as 108 gates per PFU/SLIC), including 12 gates per LUT/FF pair (eight per
PFU), and 12 gates per SLIC/FF pair (one per PFU). Each of the four PIOs per PIC is counted as 16 gates (two FFs, fast-capture latch,
output logic, CLK drivers, and I/O buffers). PFUs used as RAM are counted at four gates per bit, with each PFU capable of implementing
a 32 x 4 RAM (or 512 gates) per PFU.
High-performance, cost-effective, 0.35 µm (OR3C) and
0.3 µm (OR3T) 4-level metal technology, (4- or 5-input
look-up table delay of 1.1 ns with -7 speed grade in
0.3 µm).
Same basic architecture as lower-voltage, advanced
process technology Series 3 architectures. (See ORCA
Series 3L FPGA documentation.)
Up to 186,000 usable gates.
Up to 452 user I/Os. (OR3Txxx I/Os are 5 V tolerant to
allow interconnection to both 3.3 V and 5 V devices,
selectable on a per-pin basis.)
Pin selectable I/O clamping diodes provide 5 V or 3.3 V
PCI compliance and 5 V tolerance on OR3Txxx devices.
Twin-quad programmable function unit (PFU) architec-
ture with eight 16-bit look-up tables (LUTs) per PFU,
organized in two nibbles for use in nibble- or byte-wide
functions. Allows for mixed arithmetic and logic functions
in a single PFU.
Nine user registers per PFU, one following each LUT,
plus one extra. All have programmable clock enable and
local set/reset, plus a global set/reset that can be dis-
abled per PFU.
Flexible input structure (FINS) of the PFUs provides a
routability enhancement for LUTs with shared inputs and
the logic flexibility of LUTs with independent inputs.
Fast-carry logic and routing to adjacent PFUs for nibble-,
byte-wide, or longer arithmetic functions, with the option
to register the PFU carry-out.
Softwired LUTs (SWL) allow fast cascading of up to
three levels of LUT logic in a single PFU for up to 40%
speed improvement.
Supplemental logic and interconnect cell (SLIC) provides
3-statable buffers, up to 10-bit decoder, and PAL *-like
AND-OR with optional INVERT in each programmable
OR3C/3T55
OR3C/3T80
OR3T125
OR3T20
OR3T30
Device
System
Gates
116K
186K
36K
48K
80K
LUTs
1152
1568
2592
3872
6272
Registers
1872
2436
3780
5412
8400
Max User RAM
Field-Programmable Gate Arrays
* PAL is a trademark of Advanced Micro Devices, Inc.
† IEEE is a registered trademark of The Institute of Electrical and
100K
18K
25K
42K
62K
Electronics Engineers, Inc.
logic cell (PLC), with over 50% speed improvement typi-
cal.
Abundant hierarchical routing resources based on rout-
ing two data nibbles and two control lines per set provide
for faster place and route implementations and less rout-
ing delay.
TTL or CMOS input levels programmable per pin for the
OR3Cxx (5.0 V) devices.
Individually programmable drive capability:
12 mA sink/6 mA source or 6 mA sink/3 mA source.
Built-in boundary scan ( IEEE
TS_ALL testability function to 3-state all I/O pins.
Enhanced system clock routing for low skew, high-speed
clocks originating on-chip or at any I/O.
Up to four ExpressCLK inputs allow extremely fast clock-
ing of signals on- and off-chip plus access to internal
general clock routing.
StopCLK feature to glitchlessly stop/start ExpressCLKs
independently by user command.
Programmable I/O (PIO) has:
— Fast-capture input latch and input flip-flop (FF) latch
— Capability to (de)multiplex I/O signals.
— Fast access to SLIC for decodes and PAL -like
— Output FF and two-signal function generator to
— Fast open-drain dive capability
— Capability to register 3-state enable signal.
Baseline FPGA family used in Series 3+ FPSCs (field
programmable system chips) which combine FPGA logic
and standard cell logic on one device.
for reduced input setup time and zero hold time.
functions.
reduce CLK to output propagation delay.
ORCA
User I/Os
196
228
292
356
452
®
Series 3C and 3T
Array Size
28 x 28
12 x 12
14 x 14
18 x 18
22 x 22
1149.1 JTAG) and
0.3 µm/4 LM
0.3 µm/4 LM
0.3 µm/4 LM
0.3 µm/4 LM
0.3 µm/4 LM
Technology
Process

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