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参数资料
| 型号： | IH6108MJE |
| 厂商： | HARRIS SEMICONDUCTOR |
| 元件分类： | 运动控制电子 |
| 英文描述： | 8-Channel CMOS Analog Multiplexer |
| 中文描述： | 8-CHANNEL, SGL ENDED MULTIPLEXER, CDIP16 |
| 文件页数： | 4/9页 |
| 文件大小： | 80K |
| 代理商： | IH6108MJE |
12-131
IH6108 Application Information
ENABLE Input Strobing Levels
The ENABLE input on the IH6108 requires a minimum of
+4.5V to trigger to the “1” state and a maximum of +0.8V to
trigger to the “0” state. If the ENABLE input is being driven
from TTL logic, a pull-up resistor of 1k to 3k
is required
from the gate output to +5V supply. (See Figure 4.)
When the EN input is driven from CMOS logic, no pullup is
necessary, see Figure 5.
The supply voltage of the CD4009 affects the switching
speed of the IH6108; the same is true for TTL supply voltage
levels. The following chart shows the effect, on t
trans
for a
supply varying from +4.5V to +5.5V.
The throughput rate can therefore be maximized by using a
+5V to +5.5V supply for the ENABLE Strobe Logic.
The examples shown in Figures 4 and 5 deal with ENABLE
strobing when expansion to more than eight channels is
required. In these cases the EN terminal acts as a fourth
address input. If eight channels or less are being multi-
plexed, the EN terminal can be directly connected to +5V
logic supply to enable the IH6108 at all times.
Using the IH6108 with Supplies Other Than
±
15V
The IH6108 can be used with power supplies ranging from
±
6V to
±
16V. The switch r
DS(ON)
will increase as the supply
voltages decrease, however, the multiplexer error term (the
product of leakage times r
DS(ON)
) will remain approximately
constant since leakage decreases as the supply voltages
are reduced.
Caution must be taken to ensure that the enable (EN)
voltage is at least 0.7V below V+ at all times. If this is not
done, the Address input strobing levels will not function
properly. This may be achieved quite simply by connecting
EN (pin 2) to V+ (pin 13) via a silicon diode as shown in
Figure 6. When using this type of configuration, a further
requirement must be met: the strobe levels of A0 and A1
must be within 2.5V of the EN voltage in order to define a
binary “1” state. For the case shown in Figure 6 the EN volt-
age is 11.3V which means that logic high at A0 and A1 is
+8.8V (logic low continues to be 0.8V). In this configuration
the IH6108 cannot be driven by TTL (+5V) or CMOS (+5V)
logic. It can be driven by TTL open collector logic or CMOS
logic with +12V supplies.
If the logic and the IH6108 have common supplies, the EN
pin should again be connected to the supply through a
silicon diode. In this case, tying EN to the logic supply
directly will not work since it violates the 0.7V differential
voltage required between V+ and EN, (See Figure 7). A 1
μ
F
capacitor can be placed across the diode to minimize
switching glitches.
FIGURE 2. t
OPEN
(BREAK-BEFORE-MAKE) SWITCHING TEST CIRCUIT AND WAVEFORMS
FIGURE 3. t
ON
AND t
OFF
SWITCHING TEST CIRCUIT AND WAVEFORMS
Switching Information
(Continued)
-2V
S
2
THRU
S
7
S
8
D
A
2
A
1
A
0
+15V
-15V
V
OUT
IH6108
EN
35pF
V-
GND
V
A
200
+5V
S
1
3V
0.8V
t
OPEN
V
A
t
r
< 100ns
t
f
< 100ns
0.8V
S1 ON
S8 ON
50%
50%
t
OPEN
V
S1
= -2V
V
OUT
V
S1
S
2
THRU
S
8
A
2
A
1
A
0
+15V
-15V
V
OUT
IH6108
EN
35pF
GND
V
EN
1k
S
1
OUT
5V
0.8V
V
EN
t
r
< 100ns
t
f
< 100ns
0V
50%
t
EN(OFF)
V
S1
= -2V
V
OUT
90%
t
EN(ON)
10%
CMOS OR TTL
SUPPLY VOLTAGE
+4.5V
+4.75V
+5.00V
+5.25V
+5.50V
TYPICAL T
TRANS
AT 25
o
C
400ns
300ns
250ns
200ns
175ns
IH6108
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IH6108MJE DIE | 制造商:Harris Corporation 功能描述: |
| IH6108MJE883B | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:8-Channel CMOS Analog Multiplexer |
| IH6116 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:See DG506A |
| IH6116CDI | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Interface IC |
| IH6116CJI | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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