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74LVT2245WM_08

更新时间： 2024-11-06 12:23:31
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飞兆/仙童 - FAIRCHILD /
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9页 304K
描述
Low Voltage Octal Bidirectional Transceiver with 3-STATE Inputs/Outputs and 25 B Port Outputs

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74LVT2245WM_08 数据手册

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January 2008  
74LVT2245, 74LVTH2245  
Low Voltage Octal Bidirectional Transceiver with  
3-STATE Inputs/Outputs and 25Ω Series Resistors in the  
B Port Outputs  
Features  
General Description  
■ Input and output interface capability to systems at  
The LVT2245 and LVTH2245 contain eight non-inverting  
bidirectional buffers with 3-STATE outputs and are  
intended for bus-oriented applications. The Transmit/  
Receive (T/R) input determines the direction of data flow  
through the bidirectional transceiver. Transmit (active-  
HIGH) enables data from A Ports to B Ports; Receive  
(active-LOW) enables data from B Ports to A Ports. The  
Output Enable input, when HIGH, disables both A and B  
Ports by placing them in a high impedance state. The  
equivalent 25Ω-series resistor in the B Port helps reduce  
output overshoot and undershoot.  
5V V  
CC  
■ Equivalent 25Ω series resistor on B Port outputs  
■ Bushold data inputs eliminate the need for external  
pull-up resistors to hold unused inputs (74LVTH2245),  
also available without bushold feature (74LVT2245)  
■ Live insertion/extraction permitted  
■ Power Up/Down high impedance provides glitch-free  
bus loading  
■ Outputs source/sink –12mA/+12mA on B Port,  
–32mA/+64mA on A Port  
The LVTH2245 data inputs include bushold, eliminating  
the need for external pull-up resistors to hold unused  
inputs.  
■ Latch-up performance exceeds 500mA  
■ ESD performance:  
– Human-body model > 2000V  
– Machine model > 200V  
These transceivers are designed for low voltage (3.3V)  
V
applications, but with the capability to provide a TTL  
CC  
– Charged-device model > 1000V  
interface to a 5V environment. The LVT2245 and  
LVTH2245 are fabricated with an advanced BiCMOS  
technology to achieve high speed operation similar to 5V  
ABT while maintaining low power dissipation.  
Ordering Information  
Package  
Order Number Number  
Package Description  
74LVT2245WM  
74LVT2245SJ  
74LVT2245MTC  
M20B  
M20D  
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide  
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide  
MTC20  
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm  
Wide  
74LVTH2245WM  
74LVTH2245SJ  
74LVTH2245MTC  
M20B  
M20D  
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide  
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide  
MTC20  
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm  
Wide  
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering number.  
All packages are lead free per JEDEC: J-STD-020B standard.  
©1999 Fairchild Semiconductor Corporation  
74LVT2245, 74LVTH2245 Rev. 1.5.0  
www.fairchildsemi.com  
1234567...9

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