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參數(shù)資料
| 型號(hào)： | IDT74LVCH2540ASO |
| 廠商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類： | 總線收發(fā)器 |
| 英文描述： | LVC/LCX/Z SERIES, 8-BIT DRIVER, INVERTED OUTPUT, PDSO20 |
| 封裝： | 1.27 MM PITCH, SOIC-20 |
| 文件頁(yè)數(shù)： | 1/6頁(yè) |
| 文件大?。?/td> | 111K |
| 代理商： | IDT74LVCH2540ASO |
1
EXTENDEDCOMMERCIALTEMPERATURERANGE
IDT74LVCH2540A
3.3V CMOS OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS
APRIL 1999
1999
Integrated Device Technology, Inc.
DSC-4938/-
c
IDT74LVCH2540A
ADVANCE
INFORMATION
EXTENDED COMMERCIAL TEMPERATURE RANGE
DESCRIPTION:
The LVCH2540A octal buffer/driver is built using advanced dual metal
CMOS technology. This device is ideal for driving bus lines or buffer
memory address registers. This device features inputs and outputs on
opposite sides of the package that facilitate printed circuit board layout. The
3-state control gate is a 2-input AND gate with active-low inputs so that if
either output enable (
OE1 or OE2) input is high, all eight outputs are in the
high-impedance state.
The LVCH2540A has series resistors in the device output structure
which will significantly reduce line noise when used with light loads. This
driver has been designed to drive ±12mA at the designated threshold
levels.
To ensure the high-impedance state during power up or power down,
OE should be tied to VCC through a pullup resistor; the minimum value of
the resistor is determined by the current-sinking capability of the driver.
Inputs can be driven from either 3.3V or 5V devices. This feature allows
the use of this device as a translator in a mixed 3.3V/5V system environ-
ment.
The LVCH2540A has “bus-hold” which retains the inputs’ last state
whenever the input goes to a high impedance. This prevents floating inputs
and eliminates the need for pull-up/down resistors.
FEATURES:
–
0.5 MICRON CMOS Technology
–
ESD > 2000V per MIL-STD-883, Method 3015;
> 200V using machine model (C = 200pF, R = 0)
–
1.27mm pitch SOIC, 0.65mm pitch SSOP,
0.635mm pitch QSOP, 0.65mm pitch TSSOP packages
–
Extended commercial range of – 40°C to +85°C
–VCC = 3.3V ±0.3V, Normal Range
–VCC = 2.3V to 3.6V, Extended Range
–
CMOS power levels (0.4 W typ. static)
–
Rail-to-Rail output swing for increased noise margin
–
All inputs, outputs and I/O are 5 Volt tolerant
–
Supports hot insertion
3.3V CMOS
OCTAL BUFFER/DRIVER
WITH 3-STATE OUTPUTS, 5 VOLT
TOLERANT I/O AND BUS-HOLD
Functional Block Diagram
Drive Features for LVCH2540A:
–
Balanced Output Drivers:
±12mA
–
Low switching noise
TO SEVE N O THE R C H AN NELS
OE1
OE2
1
19
2
Y1
A1
18
APPLICATIONS:
5V and 3.3V mixed voltage systems
Data communication and telecommunication systems
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