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參數(shù)資料
| 型號： | SN74ALVCH16269DGG |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 12-BIT TO 24-BIT REGISTERED BUS EXCHANGER WITH 3-STATE OUTPUTS |
| 中文描述： | 12位到24位注冊巴士換熱具有三態(tài)輸出 |
| 文件頁數(shù)： | 1/10頁 |
| 文件大?。?/td> | 140K |
| 代理商： | SN74ALVCH16269DGG |
SN74ALVCH16269
12-BIT TO 24-BIT REGISTERED BUS EXCHANGER
WITH 3-STATE OUTPUTS
SCES019I – JULY 1995 – REVISED SEPTEMBER 1999
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Member of the Texas Instruments
Widebus
Family
EPIC
(Enhanced-Performance Implanted
CMOS) Submicron Process
ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
Latch-Up Performance Exceeds 250 mA Per
JESD 17
Bus Hold on Data Inputs Eliminates the
Need for External Pullup/Pulldown
Resistors
Package Options Include Plastic Shrink
Small-Outline (DL) and Thin Shrink
Small-Outline (DGG) Packages
description
This 12-bit to 24-bit registered bus exchanger is
designed for 1.65-V to 3.6-V V
CC
operation.
The SN74ALVCH16269 is used in applications in
which two separate ports must be multiplexed
onto, or demultiplexed from, a single port. The
device is particularly suitable as an interface
between synchronous DRAMs and high-speed
microprocessors.
Data is stored in the internal B-port registers on
the low-to-high transition of the clock (CLK) input
when the appropriate clock-enable (CLKENA)
inputs are low. Proper control of these inputs
allows two sequential 12-bit words to be
presented as a 24-bit word on the B port. For data
transfer in the B-to-A direction, a single storage
register is provided. The select (SEL) line selects 1B or 2B data for the A outputs. The register on the A output
permits the fastest possible data transfer, extending the period during which the data is valid on the bus. The
control terminals are registered so that all transactions are synchronous with CLK. Data flow is controlled by
the active-low output enables (OEA, OEB1, OEB2).
To ensure the high-impedance state during power up or power down, a clock pulse should be applied as soon
as possible, and OE should be tied to V
CC
through a pullup resistor; the minimum value of the resistor is
determined by the current-sinking capability of the driver. Due to OE being routed through a register, the active
state of the outputs cannot be determined before the arrival of the first clock pulse.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
The SN74ALVCH16269 is characterized for operation from –40
°
C to 85
°
C.
Copyright
1999, 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.
EPIC and Widebus are trademarks of Texas Instruments Incorporated.
DGG OR DL PACKAGE
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OEA
OEB1
2B3
GND
2B2
2B1
V
CC
A1
A2
A3
GND
A4
A5
A6
A7
A8
A9
GND
A10
A11
A12
V
CC
1B1
1B2
GND
1B3
NC
SEL
OEB2
CLKENA2
2B4
GND
2B5
2B6
V
CC
2B7
2B8
2B9
GND
2B10
2B11
2B12
1B12
1B11
1B10
GND
1B9
1B8
1B7
V
CC
1B6
1B5
GND
1B4
CLKENA1
CLK
NC – No internal connection
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SN74ALVCH16269DGGR | 功能描述:通用總線函數(shù) Tri-State 12-24-Bit RoHS:否 制造商:Texas Instruments 邏輯類型:CMOS 邏輯系列:74VMEH 電路數(shù)量:1 開啟電阻（最大值）: 傳播延遲時間:10.1 ns 電源電壓-最大:3.45 V 電源電壓-最小:3.15 V 最大工作溫度:+ 85 C 最小工作溫度:0 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
| SN74ALVCH16269DL | 功能描述:通用總線函數(shù) Tri-State 12-24-Bit RoHS:否 制造商:Texas Instruments 邏輯類型:CMOS 邏輯系列:74VMEH 電路數(shù)量:1 開啟電阻（最大值）: 傳播延遲時間:10.1 ns 電源電壓-最大:3.45 V 電源電壓-最小:3.15 V 最大工作溫度:+ 85 C 最小工作溫度:0 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
| SN74ALVCH16269DLR | 功能描述:通用總線函數(shù) 12B To 24B Register Bus Exchngr RoHS:否 制造商:Texas Instruments 邏輯類型:CMOS 邏輯系列:74VMEH 電路數(shù)量:1 開啟電阻（最大值）: 傳播延遲時間:10.1 ns 電源電壓-最大:3.45 V 電源電壓-最小:3.15 V 最大工作溫度:+ 85 C 最小工作溫度:0 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
| SN74ALVCH16269KR | 功能描述:通用總線函數(shù) 12-24bit Reg Bus RoHS:否 制造商:Texas Instruments 邏輯類型:CMOS 邏輯系列:74VMEH 電路數(shù)量:1 開啟電阻（最大值）: 傳播延遲時間:10.1 ns 電源電壓-最大:3.45 V 電源電壓-最小:3.15 V 最大工作溫度:+ 85 C 最小工作溫度:0 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
| SN74ALVCH16270DGGR | 功能描述:通用總線函數(shù) 12-24bit Reg Bus RoHS:否 制造商:Texas Instruments 邏輯類型:CMOS 邏輯系列:74VMEH 電路數(shù)量:1 開啟電阻（最大值）: 傳播延遲時間:10.1 ns 電源電壓-最大:3.45 V 電源電壓-最小:3.15 V 最大工作溫度:+ 85 C 最小工作溫度:0 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
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