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SN74CB3Q3245是一款高带宽FET总线开关,利用电荷泵提升传输晶体管的栅极电压,提供低而平坦的导通状态阻力(r on )。低而平坦的导通电阻允许最小的传播延迟,并支持数据输入/输出(I /O)端口上的轨到轨切换。该器件还具有低数据I /O电容,可最大限度地减少数据总线上的电容负载和信号失真。 SN74CB3Q3245专为支持高带宽应用而设计,提供优化的接口解决方案,非常适合宽带通信,网络和数据密集型计算系统。
SN74CB3Q3245采用8位总线开关,单个输出使能(OE \)输入。当OE \为低电平时,总线开关接通,A端口连接到B端口,允许端口之间的双向数据流。当OE \为高电平时,总线开关处于关闭状态,A端口和B端口之间存在高阻态。
该器件完全适用于使用I off的部分关断应用子>。 I off 电路可防止在断电时损坏通过器件的电流。器件在断电期间具有隔离功能。
为了确保上电或断电期间的高阻态,OE \应通过上拉电阻连接到V CC ;电阻的最小值由驱动器的电流吸收能力决定。
有关CB3Q系列性能特性的更多信息,请参阅TI应用报告, CBT-C,CB3T和CB3Q信号 - Switch Families ,文献编号SCDA008。
Configuration |
Number of Channels (#) |
Power Supply Type |
Vss (Min) (V) |
Vss (Max) (V) |
Vdd (Min) (V) |
Vdd (Max) (V) |
Ron (Typ) (Ohms) |
Bandwidth (MHz) |
Rating |
Operating Temperature Range (C) |
Package Size: mm2:W x L (PKG) |
Package Group |
Supply Range (Max) |
Ron (Max) (Ohms) |
Input/Output Continuous Current (Max) (mA) |
Supply Current (Typ) (uA) |
Supply Current (Max) (uA) |
Features |
OFF-state leakage current (Max) (µA) |
ON-state leakage current (Max) (µA) |
Input/Output ON-state Capacitance (Typ) (pF) |
Input/Output OFF-state Capacitance (Typ) (pF) |
ESD Charged Device Model (kV) |
ESD HBM (kV) |
VIL (Max) (V) |
VIH (Min) (V) |
SN74CB3Q3245 | SN74CBT3245A | SN74CBT3245C | SN74CBTLV3245A |
---|---|---|---|
1:1 SPST | 1:1 SPST | 1:1 SPST | 1:1 SPST |
8 | 8 | 8 | 8 |
Single | Single | Single | Single |
N/A | N/A | N/A | N/A |
N/A | N/A | N/A | N/A |
2.3 | 4 | 4 | 2.3 |
3.6 | 5.5 | 5.5 | 3.6 |
4 | 5 | 3 | 5 |
500 | 200 | 200 | 200 |
Catalog | Catalog | Catalog | Catalog |
-40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 |
20BGA MICROSTAR JUNIOR: 12 mm2: 3 x 4(BGA MICROSTAR JUNIOR) 20SSOP: 52 mm2: 6 x 8.65(SSOP) 20TSSOP: 42 mm2: 6.4 x 6.5(TSSOP) 20TVSOP: 32 mm2: 6.4 x 5(TVSOP) 20VQFN: 16 mm2: 3.5 x 4.5(VQFN) | 20BGA MICROSTAR JUNIOR: 12 mm2: 3 x 4(BGA MICROSTAR JUNIOR) 20SOIC: 132 mm2: 10.3 x 12.8(SOIC) 20SSOP: 52 mm2: 6 x 8.65(SSOP) 20SSOP: 56 mm2: 7.8 x 7.2(SSOP) 20TSSOP: 42 mm2: 6.4 x 6.5(TSSOP) 20TVSOP: 32 mm2: 6.4 x 5(TVSOP) 20VQFN: 16 mm2: 3.5 x 4.5(VQFN) | 20SOIC: 132 mm2: 10.3 x 12.8(SOIC) 20SSOP: 52 mm2: 6 x 8.65(SSOP) 20SSOP: 56 mm2: 7.8 x 7.2(SSOP) 20TSSOP: 42 mm2: 6.4 x 6.5(TSSOP) 20TVSOP: 32 mm2: 6.4 x 5(TVSOP) 20VQFN: 16 mm2: 3.5 x 4.5(VQFN) | 20BGA MICROSTAR JUNIOR: 12 mm2: 3 x 4(BGA MICROSTAR JUNIOR) 20SOIC: 132 mm2: 10.3 x 12.8(SOIC) 20SSOP: 52 mm2: 6 x 8.65(SSOP) 20TSSOP: 42 mm2: 6.4 x 6.5(TSSOP) 20TVSOP: 32 mm2: 6.4 x 5(TVSOP) 20VQFN: 16 mm2: 3.5 x 4.5(VQFN) |
BGA MICROSTAR JUNIOR SSOP TSSOP TVSOP VQFN | BGA MICROSTAR JUNIOR SOIC SSOP SSOP TSSOP TVSOP VQFN | SOIC SSOP SSOP TSSOP TVSOP VQFN | BGA MICROSTAR JUNIOR SOIC SSOP TSSOP TVSOP VQFN |
3.6 | 5.5 | 5.5 | 3.6 |
9 | 15 | 12 | 40 |
64 | 128 | 128 | 128 |
1 | |||
4 | 3 | 3 | 10 |
Powered off protection | Powered off protection -2V undershoot protection | Powered off protection | |
1 | 5 | 10 | 60 |
5 | 60 | ||
9 | 14 | ||
3.5 | 4 | 5.5 | 9 |
1 | 1 | ||
2 | 2 | 2 | |
0.8 | 0.8 | 0.8 | 0.8 |
1.7 | 2 | 2 | 2 |