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High Bandwidth Access - 3.3 Volt Synchronous x18 First-In/First-Out Queue

Numéro de référence FQV295
Description 3.3 Volt Synchronous x18 First-In/First-Out Queue
Fabricant High Bandwidth Access 
Logo High Bandwidth Access 





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FQV295 fiche technique
FQV2105 · FQV295 · FQV285 · FQV275 · FQwV2w6w5.D·aFtaQShVe2e5t45U.com
FlexQTMII
3.3 Volt Synchronous x18 First-In/First-Out Queue
Memory Configuration
262,144 x 18
131,072 x 18
65,536 x 18
32,768 x 18
16,384 x 18
8,192 x 18
Device
FQV2105
FQV295
FQV285
FQV275
FQV265
FQV255
Key Features
Industry leading First-In/First-Out Queues (up to 133MHz)
Write cycle time of 7.5ns independent of Read cycle time
Read cycle time of 7.5ns independent of Write cycle time
3.3V power supply
5V input tolerant on all control and data input pins
5V output tolerant on all flags and data output pins
Master Reset clears all previously programmed configurations including Write and Read pointers
Partial Reset clears Write and Read pointers but maintains all previously programmed configurations
First Word Fall Through (FWFT) and Standard Timing modes
Presets for eight different Almost Full and Almost Empty offset values
Parallel/Serial programming of PRAF and PRAE offset values
Full, Empty, Almost Full, Almost Empty, and Half Full indicators
Asynchronous output enable tri-state data output drivers
Data retransmission
Available package: 64 - pin Plastic Thin Quad Flat Pack (TQFP), 64 - pin Slim Thin Quad Flat Pack (STQFP)
(0°C to 70°C) Commercial operating temperature available for cycle time of 7.5ns and above
(-40°C to 85°C) Industrial operating temperature available for cycle time of 7.5ns and above
Product Description
HBA’s FlexQ™ II offers industry leading FIFO queuing bandwidth (up to 3.0 Gbps), with a wide range of memory
configurations (from 8,192 x 18 to 262,144 x 18). System designer has full flexibility of implementing deeper and wider queues
using FWFT mode and width expansion features. Full, Empty, and Half-Full indicators allow easy handshaking between
transmitters and receivers. User programmable Almost Full and Almost Empty (Parallel/Serial) indicators allow implementation
of virtual queue depths.
5V tolerant on all input and output pins allow easy interfacing with devices operating at higher voltage levels. Asynchronous
Output Enable pin configures the tri-state data output drivers. Independent Write and Read controls provide rate-matching
capability.
Master Reset clears all previously programmed configurations by providing a low pulse on MRST pin. In addition, Write and
Read pointers to the queue are initialized to zero. Partial Reset will not alter previously programmed configurations but will
initialize Write and Read pointers to zero.
In FWFT mode, first data written into the queue appears on output data bus after the specified latency period at the low to high
transition of RCLK. Subsequent reads from the queue will require asserting REN . This feature is useful when implementing
depth expansion functions. In this mode, DRDY and QRDY are used instead of FULL and EMPTY respectively.
In Standard mode, always assert REN for read operation. FULL and EMPTY are used instead of DRDY and
QRDY respectively.
PRAF , PRAE , and HALF are available in either FWFT or Standard mode.
3F218C
© 2001 High Bandwidth Access, Inc. All rights reserved. Product specifications subject to change without notice.
OCTOBER 2002
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