CD54HC4051_15 Datasheet, PDF (24/45 Pages) Texas Instruments – High-Speed CMOS Logic Analog Multiplexers and Demultiplexers

CD54HC4051, CD74HC4051
CD54HCT4051, CD74HCT4051, CD54HC4052, CD74HC4052, CD54HCT4052
CD74HCT4052, CD54HC4053, CD74HC4053, CD54HCT4053, CD74HCT4053
SCHS122K – NOVEMBER 1997 – REVISED SEPTEMBER 2015
www.ti.com
Typical Application (continued)
See Table 4 for the input loading details.
4051, 4053
4052
TYPE
Table 4. HCT Input Loading Table
INPUT
All
All
UNIT LOADS⁽¹⁾
0.5
0.4
(1) Unit load is ΔI_CC limit specified in Specifications, for example, 360-mA MAX at 25°C.
9.2.2 Detailed Design Procedure
1. Recommended input conditions:
– For switch time specifications, see propagation delay times in Electrical Characteristics: HC Devices.
– Inputs must not be pushed more than 0.5 V above V_DD or below V_EE.
– For input voltage level specifications for control inputs, see V_IH and V_IL in Electrical Characteristics: HC
Devices.
2. Recommended output conditions:
– Outputs must not be pulled above V_DD or below V_EE.
3. Input and output current consideration:
– The CDx4HCx405x series of parts do not have internal current-drive circuitry, and thus cannot sink or
source current. Any current will be passed through the device.
9.2.3 Application Curve
120
100
80
V_CC − V_EE = 4.5V
60
V_CC − V_EE = 6V
40
V_CC − V_EE = 9V
20
1
2
3
4
5
6
7
8
9
INPUT SIGNAL VOLTAGE (V)
Figure 21. Typical ON Resistance vs Input Signal Voltage
10 Power Supply Recommendations
The power supply can be any voltage between the minimum and maximum supply voltage rating located in the
Electrical Characteristics: HC Devices.
Each V_CC terminal must have a good bypass capacitor to prevent power disturbance. For devices with a single
supply, a 0.1-μF bypass capacitor is recommended. If there are multiple pins labeled V_CC, then a 0.01-μF or
0.022-μF capacitor is recommended for each V_CC because the V_CC pins will be tied together internally. For
devices with dual-supply pins operating at different voltages, for example V_CC and V_DD, a 0.1-µF bypass
capacitor is recommended for each supply pin. It is acceptable to parallel multiple bypass capacitors to reject
different frequencies of noise. A 0.1-μF and a 1-μF capacitor are commonly used in parallel. For best results, the
bypass capacitor or capacitors must be installed as close as possible to the power terminal.
24
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