SP4257 Datasheet, PDF (2/6 Pages) SIPAT Co,Ltd – 50 Ω SPDT Absorptive CMOS

SP4257
Product Specification
Figure 3. Pin Configuration (Top View)
GND 1
GND 2
RF1 3
GND, RF1 Term. 4
GND 5
GND
15 GND
14 GND
13 RF2
12 GND, RF2 Term.
11 GND
Table 3. Absolute Maximum Ratings
Symbol Parameter/Condition
V_DD Power supply voltage
V_I
Voltage on any DC input
P_RF
RF power on RFC, RF1, RF2
On Port/ Terminated Port
T_ST Storage temperature
T_OP Operating temperature
V_ESD
ESD voltage
(Human Body Model)
Min
-0.3
-0.3
-65
-40
1000
Max Units
4.0
V
V_DD + 0.3 V
33/24 dBm
+150
°C
+85
°C
V
Exceeding absolute maximum ratings may cause
permanent damage. Operation should be restricted to
the limits in the Operating Ranges table. Operation
between operating range maximum and absolute
maximum for extended periods may reduce reliability.
4x4mm 20-Lead QFN
Table 2. Pin Descriptions
No.
Name
Description
1
GND
RF Ground
2
GND
RF Ground
3¹
RF1
RF I/O
4
GND
RF Ground
5
GND
RF Ground
6
GND
RF Ground
7
GND
RF Ground
8¹
RFC
RF Common
9
GND
RF Ground
10
GND
RF Ground
11
GND
RF Ground
12
GND
RF Ground
13¹
RF2
RF I/O
14
GND
RF Ground
15
GND
RF Ground
16²
CTRL2
Control 2
17²
CTRL1
Control 1
18³
VSS / GND Negative Supply Option
19
GND
Digital Ground
20
VDD
Supply
Pad
GND
RF Ground Pad
Notes: 1. RF pins 3, 8, and 13 must be at 0 VDC. The RF pins do
not require DC blocking capacitors for proper operation if the
0 VDC requirement is met.
2. Pins 16 and 17 are the CMOS controls that set the four
operating states.
3. Connect pin 18 to GND to enable the negative voltage
generator. Connect pin 18 to V_SS (-3 V) to bypass and
disable internal -3 V supply generator. See paragraph
“Switching Frequency.”
Table 4. Operating Ranges @ 25 °C
Parameter
V_DD Power Supply
I_DD Power Supply Current
(V_DD = 3V, V_CNTL = 3V)
Control Voltage High
Control Voltage Low
Min Typ Max Unit
2.7
3.0
3.3
V
8
20
µA
0.70 V_DD
0
V
0.30 V_DD V
Latch-Up Avoidance
Unlike conventional CMOS devices, CMOS
devices are immune to latch-up.
Electrostatic Discharge (ESD) Precautions
When handling this CMOS device, observe the
same precautions that you would use with other ESD-
sensitive devices. Although this device contains
circuitry to protect it from damage due to ESD,
precautions should be taken to avoid exceeding the
rating specified.
Switching Frequency
The SP4257 has a maximum 25 kHz switching rate
when the internal negative voltage generator is used
(pin 18=GND). The rate at which the SP4257 can be
switched is only limited to the switching time if an
external -3 V supply is provided at (pin18=V_SS ).
Table 5. Truth Table
CTRL1
Low
Low
High
High
CTRL2
Low
High
Low
High
RFC – RF1
OFF
OFF
ON
N/A¹
RFC – RF2
OFF
ON
OFF
N/A¹
Notes: 1. The operation of the SP4257 is not supported or
characterized in the C1=V_DD and C2=V_DD state.
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