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SN74ALVC16270 PDF预览

SN74ALVC16270

更新时间: 2024-09-16 12:22:31
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德州仪器 - TI 输出元件
页数 文件大小 规格书
11页 188K
描述
12-BIT TO 24-BIT REGISTERED BUS EXCHANGER WITH 3-STATE OUTPUTS

SN74ALVC16270 数据手册

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ꢀꢁꢂ ꢃ ꢄ ꢅꢆ ꢇꢈ ꢉꢊ ꢂꢋ  
ꢈ ꢊ ꢌꢍꢎ ꢏ ꢏ ꢐ ꢊ ꢃ ꢌꢍꢎ ꢏ ꢑꢒꢓ ꢎ ꢀꢏ ꢒꢑꢒꢔ ꢍꢕꢀ ꢒꢖ ꢇꢗ ꢄ ꢁꢓ ꢒ ꢑ  
ꢘ ꢎꢏ ꢗ ꢙ ꢌꢀꢏꢄꢏ ꢒ ꢐ ꢕꢏ ꢚ ꢕꢏꢀ  
SCAS433A − OCTOBER 1993 − REVISED JULY 1995  
DGG OR DL PACKAGE  
(TOP VIEW)  
D EPIC (Enhanced-Performance Implanted  
CMOS) Submicron Process  
D Member of the Texas Instruments  
D ESD Protection Exceeds 2000 V Per  
MIL-STD-883C, Method 3015; Exceeds  
200 V Using Machine Model  
OEA  
CLKEN1B  
2B3  
1
56  
55  
54  
53  
52  
51  
50  
49  
48  
47  
46  
45  
44  
43  
42  
41  
40  
39  
38  
37  
36  
35  
34  
33  
32  
31  
30  
29  
OEB  
CLKENA2  
2B4  
GND  
2B5  
2B6  
WidebusFamily  
2
3
GND  
2B2  
2B1  
4
5
(C = 200 pF, R = 0)  
6
D Latch-Up Performance Exceeds 250 mA  
V
7
V
CC  
CC  
Per JEDEC Standard JESD-17  
A1  
A2  
A3  
GND  
A4  
A5  
A6  
A7  
A8  
8
2B7  
2B8  
2B9  
D Bus Hold on Data Inputs Eliminates  
the Need for External Pullup/Pulldown  
Resistors  
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
GND  
2B10  
2B11  
2B12  
1B12  
1B11  
1B10  
GND  
1B9  
D Package Options Include Plastic Shrink  
Small-Outline (DL) and Thin Shrink  
Small-Outline (DGG) Packages  
description  
A9  
The SN74ALVC16270 is a 12-bit to 24-bit  
registered bus exchanger, which is intended for  
use in applications where data must be  
transferred from a narrow high-speed bus to a  
wide lower-frequency bus. This device is  
GND  
A10  
A11  
A12  
1B8  
1B7  
V
V
CC  
CC  
designed specifically for low-voltage (3.3-V) V  
operation.  
CC  
1B1  
1B2  
GND  
1B3  
1B6  
1B5  
GND  
1B4  
CLKENA1  
CLK  
The device provides synchronous data exchange  
between the two ports. Data is stored in the  
internal registers on the low-to-high transition of  
the clock (CLK) input when the appropriate  
CLKEN inputs are low. The select (SEL) line  
selects 1B or 2B data for the A outputs. For data  
transfer in the A-to-B direction, a two-stage  
pipeline is provided in the A-to-1B path,  
CLKEN2B  
SEL  
with a single storage register in the A to 2B path. Proper control of the CLKENA inputs allows two sequential  
12-bit words to be presented synchronously as a 24-bit word on the B port. Data flow is controlled by the  
active-low output enables (OEA, OEB). The control terminals are registered to synchronize the bus direction  
changes with CLK.  
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.  
The SN74ALVC16270 is available in TI’s shrink small-outline (DL) and thin shrink small-outline (DGG)  
packages, which provide twice the I/O pin count and functionality of standard small-outline packages in the  
same printed-circuit-board area.  
The SN74ALVC16270 is characterized for operation from 40°C to 85°C.  
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.  
EPIC and Widebus are trademarks of Texas Instruments Incorporated.  
ꢏꢦ  
Copyright 1995, Texas Instruments Incorporated  
ꢢ ꢦ ꢣ ꢢꢛ ꢜꢰ ꢞꢝ ꢡ ꢩꢩ ꢧꢡ ꢟ ꢡ ꢠ ꢦ ꢢ ꢦ ꢟ ꢣ ꢫ  
1
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443  

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