74FST3125

Features:

• RON < 4 Typical
• Less Than 0.25 ns−Max Delay Through Switch
• Nearly Zero Standby Current
• No Circuit Bounce
• Control Inputs are TTL/CMOS Compatible
• Pin−For−Pin Compatible With QS3125, FST3125, CBT3125
• All Popular Packages: QSOP−16, TSSOP−14, SOIC−14
• All Devices in Package TSSOP are Inherently Pb−Free*



Pinout




Specifications

Symbol	Parameter	Value	Unit
VCC	DC Supply Voltage	-0.5 to -7.0	V
VI	DC Input Voltage	-0.5 to -7.0	V
VO	DC Output Voltage	-0.5 to -7.0	V
IIK	DC Input Diode Current                                                  VI < GND	-50	mA
IOK	DC Output Diode Current                                                VO < GND	-50	mA
IO	DC Output Sink Current	128	mA
ICC	DC Supply Current per Supply Pin	±100	mA
IGND	DC Ground Current per Ground Pin	±100	mA
TSTG	Storage Temperature Range	-65 to 150
TL	Lead Temperature, 1 mm from Case for 10 Seconds	260
TJ	Junction Temperature Under Bias	+150
JA	Thermal Resistance (Note 1)                                                    SOIC                                                                                                TSSOP                                                                                                 QSOP	125 170 200	/W
MSL	Moisture Sensitivity	Level 1
FR	Flammability Rating                                         Oxygen Index: 28 to 34	UL 94 V−0 @ 0.125 in
VESD	ESD Withstand Voltage                             Human Body Model (Note 2)                                                                          Machine Model (Note 3)	2000 2000	V
ILatchup	Latchup Performance       Above VCC and Below GND at 85 C (Note 4)	±500	mA

Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the
device are individual stress limit values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied, damage may occur and reliability may be affected.
1. Measured with minimum pad spacing on an FR4 board, using 10 mm−by−1 inch, 2−ounce copper trace with no
    air flow.
2. Tested to EIA/JESD22−A114−A.
3. Tested to EIA/JESD22−A115−A.
4. Tested to EIA/JESD78.


Description

The ON Semiconductor 74FST3125 is a quad, high performance switch. The device is CMOS TTL compatible when operating between 4 and 5.5 Volts. The device exhibits extremely low RON and adds nearly zero propagation delay. The device adds no noise or ground bounce to the system.

The 74FST3125 consists of four independent 1−bit switches with separate Output/Enable (OE) pins. Port A is connected to Port B when OE is low. If OE is high, the switch is high Z.