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74AVCH2T45DCTRE4 Datasheet(PDF) 20 Page - Texas Instruments

Part No. 74AVCH2T45DCTRE4
Description  2-Supply, Bus Transceiver with Configurable Level-Shifting
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Maker  TI1 [Texas Instruments]
Homepage  http://www.ti.com
Logo TI1 - Texas Instruments

74AVCH2T45DCTRE4 Datasheet(HTML) 20 Page - Texas Instruments

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A1
A2
VCCA
B1
B2
DIR
VCCB
GND
VIA to GND Plane
B2
B1
A1
A2
C2
C1
D2
D1
SN74AVCH2T45
SCES582H – JULY 2004 – REVISED APRIL 2015
www.ti.com
11 Power Supply Recommendations
A proper power-up sequence always should be followed to avoid excessive supply current, bus contention,
oscillations, or other anomalies. To guard against such power-up problems, take the following precautions:
1. Connect ground before any supply voltage is applied.
2. Power up VCCA.
3. VCCB can be ramped up along with or after VCCA.
Table 4. Typical Total Static Power Consumption (ICCA + ICCB)
VCCA
VCCB
UNIT
0 V
1.2 V
1.5 V
1.8 V
2.5 V
3.3 V
0 V
0
< 0.5
< 0.5
< 0.5
< 0.5
< 0.5
1.2 V
< 0.5
< 1
< 1
< 1
< 1
1
1.5 V
< 0.5
< 1
< 1
< 1
< 1
1
μA
1.8 V
< 0.5
< 1
< 1
< 1
< 1
< 1
2.5 V
< 0.5
1
< 1
< 1
< 1
< 1
3.3 V
< 0.5
1
< 1
< 1
< 1
< 1
12 Layout
12.1 Layout Guidelines
To ensure reliability of the device, following common printed-circuit board layout guidelines is recommended.
Bypass capacitors should be used on power supplies. Place the capacitors as close as possible to the VCCA,
VCCB pin and GND pin.
Short trace lengths should be used to avoid excessive loading.
12.2 Layout Example
Figure 11. Layout Example for YZP Package
20
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Product Folder Links: SN74AVCH2T45


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