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SN74ACT2236 bảng dữ liệu(PDF) 1 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  1024x9x2 ASYNCHRONOUS BIDIRECTIONAL FIRST-IN, FIRST-OUT MEMORY
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SN74ACT2236 bảng dữ liệu(HTML) 1 Page - Texas Instruments

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SN74ACT2236
1024 × 9 × 2
ASYNCHRONOUS BIDIRECTIONAL FIRST IN, FIRST OUT MEMORY
SCAS149A − APRIL 1990 − REVISED SEPTEMBER 1995
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251−1443
D Independent Asynchronous Inputs and
Outputs
D Low-Power Advanced CMOS Technology
D Bidirectional
D 1024 Words by 9 Bits Each
D Programmable Almost-Full/Almost-Empty
Flag
D Empty, Full, and Half-Full Flags
D Access Times of 25 ns With a 50-pF Load
D Data Rates From 0 to 50 MHz
D Fall-Through Times of 23 ns Max
D High Output Drive for Direct Bus Interface
D 3-State Outputs
D Available in 44-Pin PLCC (FN) Package
B2
B3
B4
VCC
B5
B6
B7
B8
GND
AF/AEB
HFB
39
38
37
36
35
34
33
32
31
30
29
18 19
7
8
9
10
11
12
13
14
15
16
17
A3
A4
VCC
A5
A6
A7
A8
GND
AF/AEA
HFA
LDCKA
20 21 22 23
FN PACKAGE
(TOP VIEW)
54
3
2
1
644
42 41 40
43
24 25 26 27 28
description
A FIFO memory is a storage device that allows data to be written into and read from its array at independent
data rates. The SN74ACT2236 is arranged as two 1024 by 9-bit FIFOs for high speed and fast access times.
It processes data at rates from 0 to 50 MHz with access times of 25 ns in a bit-parallel format.
The SN74ACT2236 consists of bus-transceiver circuits, two 1024
× 9 FIFOs, and control circuitry arranged for
multiplexed transmission of data directly from the data bus or from the internal FIFO memories. Enable OE and
DIR inputs are provided to control the transceiver functions. The select-control (SAB and SBA) inputs are
provided to select whether real-time or stored data is transferred. The circuitry used for select control eliminates
the typical decoding glitch that occurs in a multiplexer during the transition between stored and real-time data.
Figure 1 shows the five fundamental bus-management functions that can be performed with the SN74ACT2236.
The SN74ACT2236 is characterized for operation from 0
°C to 70°C.
For more information on this device family, see the application report 1K
 9  2 Asynchronous FIFOs
SN74ACT2235 and SN74ACT2236 in the 1996 High-Performance FIFO Memories Designer’s Handbook,
literature number SCAA012A.
Copyright
 1995, 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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