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參數(shù)資料
| 型號(hào)： | MAX3408EUK+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 4/6頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC TERMINATION NETWORK SOT23-5 |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 類型： | 纜線 |
| 端子數(shù)： | 1 |
| 電源電壓： | 4.5 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | SC-74A，SOT-753 |
| 供應(yīng)商設(shè)備封裝： | SOT-23-5 |
| 包裝： | 帶卷 (TR) |
Detailed Description
The MAX3406/MAX3407/MAX3408 are line-terminating
networks. They provide 75
, 100, and 120 termina-
tion to be compatible with twisted pair or coaxial cable.
The MAX3406/MAX3407/MAX3408 consume only 50A
supply current and operate from a +4.5V to +5.5V
power supply. They are available in a space-saving 5-
pin SOT23 package. All specifications are guaranteed
over the extended temperature range of -40°C to
+85°C.
The ENABLE pin allows switching from one termination
value to another: 75
to 100 for the MAX3406, 75 to
120
for the MAX3407, and 100 to 120 for the
MAX3408 (Figure 1 and Table 1).
Applications Information
In order for the MAX3406/MAX3407/MAX3408 to termi-
nate transmission lines correctly, they should look like a
precision resistance. These devices look this way under
all operating conditions as can be seen from the Typical
Operating Characteristics. The very small variations in
resistance with temperature, input voltage, and frequen-
cy should not be of any concern in most applications,
though the users should be aware of them. The next
three sections describe these variations and explain
what end application effect they could have.
The function of a termination is to minimize line reflec-
tions by terminating a transmission line in its character-
istic impedance. The reflection coefficient for a line of
Z0 characteristic impedance terminated with a given
ZL is:
Voltage Reflection Coefficient = (ZL - Z0)/(ZL + Z0)
MAX3406/MAX3407/MAX3408
75
/100/120 Switchable Termination
Networks
4
_______________________________________________________________________________________
0%
20%
10%
50%
40%
30%
80%
70%
60%
90%
74.40
74.80
74.60
75.00
75.20
75.40
75.60
ACCURACY DISTRIBUTION
75
MODE
MAX3406/7/8
toc10
RESISTANCE (
)
PERCENTAGE
OF
PRODUCTION
0%
20%
10%
50%
40%
30%
80%
70%
60%
90%
98.8
99.6
99.2
100.0
100.4
100.8
101.2
ACCURACY DISTRIBUTION
100
MODE
MAX3406/7/8
toc11
RESISTANCE (
)
PERCENTAGE
OF
PRODUCTION
0%
20%
10%
50%
40%
30%
80%
70%
60%
90%
118.5
119.5
119.0
120.0
120.5
121.0
121.5
ACCURACY DISTRIBUTION
120
MODE
MAX3406/7/8
toc12
RESISTANCE (
)
PERCENTAGE
OF
PRODUCTION
Typical Operating Characteristics (continued)
(VCC = +5V, TA = +25°C, unless otherwise noted.)
Pin Description
PIN
NAME
FUNCTION
1VCC
Supply Voltage +4.5V to +5.5V. Bypass to GND with a 0.1
F capacitor.
2
GND
Ground
3
ENABLE
Digital Control Input. Drive ENABLE high to turn on the internal switch, pull ENABLE low to disable
the internal switch.
4
B
Cable Terminator Terminal B
5
A
Cable Terminator Terminal A
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