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| 型號： | SN74ACT3631PQ |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Low-Voltage CMOS Quad 2-Input Multiplexer; Package: SOEIAJ-16; No of Pins: 16; Container: Rail; Qty per Container: 50 |
| 中文描述： | 512】36時鐘先入先出存儲器 |
| 文件頁數(shù)： | 1/26頁 |
| 文件大小： | 378K |
| 代理商： | SN74ACT3631PQ |
SN74ACT3631
512
×
36
CLOCKED FIRST-IN, FIRST-OUT MEMORY
SCAS246G – AUGUST 1993 – REVISED APRIL 1998
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Free-Running CLKA and CLKB Can Be
Asynchronous or Coincident
Clocked FIFO Buffering Data From Port A
to Port B
Synchronous Read-Retransmit Capability
Mailbox Register in Each Direction
Programmable Almost-Full and
Almost-Empty Flags
Microprocessor Interface Control Logic
Input-Ready and Almost-Full Flags
Synchronized by CLKA
Output-Ready and Almost-Empty Flags
Synchronized by CLKB
Low-Power 0.8-
μ
m Advanced CMOS
Technology
Supports Clock Frequencies up to 67 MHz
Fast Access Times of 11 ns
Pin-to-Pin Compatible With the
SN74ACT3641 and SN74ACT3651
Package Options Include 120-Pin Thin
Quad Flat (PCB) and 132-Pin Plastic Quad
Flat (PQ) Packages
description
The SN74ACT3631 is a high-speed, low-power, CMOS clocked FIFO memory. It supports clock frequencies
up to 67 MHz and has read access times as fast as 11 ns. The 512
×
36 dual-port SRAM FIFO buffers data from
port A to port B. The FIFO memory has retransmit capability, which allows previously read data to be accessed
again. The FIFO has flags to indicate empty and full conditions and two programmable flags (almost full and
almost empty) to indicate when a selected number of words is stored in memory. Communication between each
port can take place with two 36-bit mailbox registers. Each mailbox register has a flag to signal when new mail
has been stored. Two or more devices can be used in parallel to create wider datapaths. Expansion also is
possible in word depth.
The SN74ACT3631 is a clocked FIFO, which means each port employs a synchronous interface. All data
transfers through a port are gated to the low-to-high transition of a continuous (free-running) port clock by enable
signals. The continuous clocks for each port are independent of one another and can be asynchronous or
coincident. The enables for each port are arranged to provide a simple interface between microprocessors
and/or buses with synchronous control.
The input-ready (IR) flag and almost-full (AF) flag of the FIFO are two-stage synchronized to CLKA. The
output-ready (OR) flag and almost-empty (AE) flag of the FIFO are two-stage synchronized to CLKB. Offset
values for the AF and AE flags of the FIFO can be programmed from port A or through a serial input.
The SN74ACT3631 is characterized for operation from 0
°
C to 70
°
C.
For more information on this device family, see the following application reports:
FIFO Patented Synchronous Retransmit: Programmable DSP-Interface Application for FIR Filtering
(literature number SCAA007)
FIFO Mailbox-Bypass Registers: Using Bypass Registers to Initialize DMA Control(literature number
SCAA007)
Metastability Performance of Clocked FIFOs (literature number SCZA004).
Copyright
1998, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SN74ACT3632-15PCB | 功能描述:先進先出 512 x 36 x 2 bidir Synch 先進先出 Memory RoHS:否 制造商:IDT 電路數(shù)量: 數(shù)據(jù)總線寬度:18 bit 總線定向:Unidirectional 存儲容量:4 Mbit 定時類型:Synchronous 組織:256 K x 18 最大時鐘頻率:100 MHz 訪問時間:10 ns 電源電壓-最大:3.6 V 電源電壓-最小:6 V 最大工作電流:35 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-80 封裝: |
| SN74ACT3632-15PQ | 功能描述:先進先出 512 x 36 x 2 bidir Synch 先進先出 Memory RoHS:否 制造商:IDT 電路數(shù)量: 數(shù)據(jù)總線寬度:18 bit 總線定向:Unidirectional 存儲容量:4 Mbit 定時類型:Synchronous 組織:256 K x 18 最大時鐘頻率:100 MHz 訪問時間:10 ns 電源電壓-最大:3.6 V 電源電壓-最小:6 V 最大工作電流:35 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-80 封裝: |
| SN74ACT3632-15PQG4 | 功能描述:先進先出 512 x 36 x 2 bidir Synch 先進先出 Memory RoHS:否 制造商:IDT 電路數(shù)量: 數(shù)據(jù)總線寬度:18 bit 總線定向:Unidirectional 存儲容量:4 Mbit 定時類型:Synchronous 組織:256 K x 18 最大時鐘頻率:100 MHz 訪問時間:10 ns 電源電壓-最大:3.6 V 電源電壓-最小:6 V 最大工作電流:35 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-80 封裝: |
| SN74ACT3632-20PCB | 功能描述:先進先出 512 x 36 x 2 bidir Synch 先進先出 Memory RoHS:否 制造商:IDT 電路數(shù)量: 數(shù)據(jù)總線寬度:18 bit 總線定向:Unidirectional 存儲容量:4 Mbit 定時類型:Synchronous 組織:256 K x 18 最大時鐘頻率:100 MHz 訪問時間:10 ns 電源電壓-最大:3.6 V 電源電壓-最小:6 V 最大工作電流:35 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-80 封裝: |
| SN74ACT3632-20PQ | 功能描述:先進先出 512 x 36 x 2 bidir Synch 先進先出 Memory RoHS:否 制造商:IDT 電路數(shù)量: 數(shù)據(jù)總線寬度:18 bit 總線定向:Unidirectional 存儲容量:4 Mbit 定時類型:Synchronous 組織:256 K x 18 最大時鐘頻率:100 MHz 訪問時間:10 ns 電源電壓-最大:3.6 V 電源電壓-最小:6 V 最大工作電流:35 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-80 封裝: |
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