E4257ALPT Semtech, E4257ALPT Datasheet - Page 21

• Manufacturer Part Number: E4257ALPT
• Manufacturer: Semtech

Specifications of E4257ALPT

• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

Use of Switches for Super Voltage (E4287 ONLY)
An application of the E42X7 switches and switch matrices
is to connect their PMU and an external PMU to a DUT
pin and to switch a pin electronics driver’s levels to a
Super Voltage as shown below.
In many applications, the external PMU’s range may need
to exceed that of a pin’s PMU (a pin’s PMU range may be
restricted in order to save power). For example, VEE =
–5.0V, VCC = +8.25V, SVCC = +14.75V would permit
a PMU range of –3.25V, +6.5V, super voltage of +12V,
and an external PMU range of –4.75V, +14.5V
(SELIPMU = 0).
TEST AND MEASUREMENT PRODUCTS
Application Information (continued)
2005 Semtech Corp. / Rev. 5, 11/30/05
ADC
IVMON
DVHH
NOTE: Switch impedance is shown for typical value
DVH
DVL
SYSTEM PMU
PPMU
SELEPMU
SELIPMU
S
S
F
F
SELC
E4287
1K
1K
40
1K
40
1K
1K
1K
21
DVL
OUTPUT WAVEFORM:
DVH
E4237/E4257/E4287
1000 pF
1000 pF
DRIVER
DVHH (Super Voltage)
E4287 ONLY
PIN'S
DUT PIN
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