FSTD3125_08 Datasheet, PDF (1/8 Pages) Fairchild Semiconductor – 4-Bit Bus Switch with Level Shifting

March 2008
FSTD3125 — 4-Bit Bus Switch with Level Shifting
Features
ƒ 4Ω Switch Connection between Two Ports
ƒ Minimal Propagation Delay through the Switch
ƒ Low ICC
ƒ Zero Bounce in Flow-through Mode
ƒ Control Inputs Compatible with TTL Level
ƒ TruTranslation Voltage Translation from 5.0V
Inputs to 3.3V Outputs
Description
Fairchild switch FSTD3125 provides four high-speed
CMOS TTL-compatible bus switches. The low on
resistance of the switch allows inputs to be connected
to outputs without adding propagation delay or
generating additional ground bounce noise. A diode to
VCC has been integrated into the circuit to allow for level
shifting between 5V inputs and 3.3V outputs.
The device is organized as four one-bit switches with
separate /OE inputs. When /OE is LOW, the switch is
ON and port A is connected to port B. When /OE is
HIGH, the switch is OPEN and a high-impedance state
exists between the two ports.
Ordering Information
Operating
Part Number Temperature
Range
Package
Packing
Method
FSTD3125MTC
FSTD3125MTCX
-40 to 85°C
-40 to 85°C
14-Lead, Thin Shrink Small Outline Package (TSSOP) JEDEC
MO-153, 4mm Wide
14-Lead, Thin Shrink Small Outline Package (TSSOP), JEDEC
MO-153, 4mm Wide
Tube
Tape and Reel
All packages are lead free per JEDEC: J-STD-020B standard.
Technology Description
The Fairchild switch family derives from and embodies Fairchild’s proven switch technology used for several years in its
74LVX3L384 (FST3384) bus switch product.
/OE₁ ¹
1A ²
/OE₂ ⁴
3 _1B
2A ⁵
6 _2B
10
/OE₃
3A ⁹
/OE₄ ¹³
8 _3B
4A ¹²
Figure 1. Logic Diagram
11 _4B
© 2001 Fairchild Semiconductor Corporation
FSTD3125 • Rev. 1.0.2
www.fairchildsemi.com