器件名称: IZ74LV244
功能描述: OCTAL BUFFER/LINE DRIVER 3-STATE
文件大小: 157.85KB 共4页
简 介:IN74LV244
OCTAL BUFFER/LINE DRIVER 3-STATE
The IN74LV244 is a low-voltage Si-gate CMOS device and is pin and function compatible with IN74HC/HCT244. The IN74LV244 is an octal non-inverting buffer/line N SUFFIX driver with 3-state outputs. The 3-state outputs are controlled PLASTIC DIP by the output enable inputs 1OE and 2OE . A HIGH on nOE causes the outputs to assume a high impedance OFF-state. The IN74LV244 is identical to the IN74LV240 but has non20 1 inverting outputs. DW SUFFIX Outputs Directly Interface to CMOS, NMOS, and TTL Operating Voltage Range: 1.2 to 3.6 V Low Input Current: 1.0 A, 0.1 А at Т = 25 °С Output Current: 8 mA at VCC = 3.0 V High Noise Immunity Characteristic of CMOS Devices
20 1 SO
ORDERING INFORMATION IN74LV244N Plastic DIP IN74LV244DW SOIC IZ74LV244 chip TA = -40° to 125° C for all packages
LOGIC DIAGRAM
1A 0 1A 1 1A 2 1A 3
2 4 6 8 11 13
18 16 14 12 9 7 5 3
1Y 0 1Y 1 1Y2 1Y3 2Y0 2Y1 2Y 0 2Y 1
PIN ASSIGNMENT
1OE 1A0 2Y3
NONINVERTING OUTPUTS
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
VCC 2OE 1Y0 2A3 1Y1 2A2 1Y2 2A1 1Y3 2A0
DATA INPUTS
1A1 2Y2 1A2 2Y1 1A3 2Y0 GND
2A 0 2A 1
2A 0 15 2A 1 17
OUTPUT ENABLES
1OE 2OE
1 19
PIN 20=VCC PIN 10 = GND
FUNCTION TABLE OUTPUT Input nOE nAn nYn L L L L H H H X Z H= high level L = low level X = don’t care Z = high impedance
1
IN74LV244
MAXIMUM RATINGS Symbol Parameter Value VCC DC supply voltage -0.5 to +5.0 IIK *1 DC Input diode current ±20 IOK *2 DC Output diode current ±50 IO *3 DC……
