SN74CB3T1G125_15 Datasheet, PDF (1/16 Pages) Texas Instruments – SINGLE FET BUS SWITCH 2.5-V/3.3-V LOW-VOLTAGE SWITCH WITH 5-V-TOLERANT LEVEL SHIFTER

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SN74CB3T1G125
SINGLE FET BUS SWITCH 2.5-V/3.3-V LOW-VOLTAGE SWITCH
WITH 5-V-TOLERANT LEVEL SHIFTER
SCDS150A – OCTOBER 2003 – REVISED SEPTEMBER 2006
FEATURES
• Output Voltage Translation Tracks V_CC
• Supports Mixed-Mode Signal Operation on All
Data I/O Ports
– 5-V Input Down to 3.3-V Output Level Shift
With 3.3-V V_CC
– 5-V/3.3-V Input Down to 2.5-V Output Level
Shift With 2.5-V V_CC
• 5-V-Tolerant I/Os, With Device Powered Up or
Powered Down
• Bidirectional Data Flow With Near-Zero
Propagation Delay
• Low ON-State Resistance (r_on) Characteristics
(r_on = 5 Ω Typ)
• Low Input/Output Capacitance Minimizes
Loading (C_io(OFF) = 5 pF Typ)
• Data and Control Inputs Provide Undershoot
Clamp Diodes
• Low Power Consumption
(I_CC = 20 µA Max)
• V_CC Operating Range From 2.3 V to 3.6 V
• Data I/Os Support 0- to 5-V Signaling Levels
(0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, 5 V)
• Control Inputs Can Be Driven by TTL or
5-V/3.3-V CMOS Outputs
• I_off Supports Partial-Power-Down Mode
Operation
• Latch-Up Performance Exceeds 250 mA Per
JESD 17
• ESD Performance Tested Per JESD 22
– 2000-V Human-Body Model
(A114-B, Class II)
– 1000-V Charged-Device Model (C101)
• Supports Digital Applications: Level
Translation, USB Interface, Bus Isolation
• Ideal for Low-Power Portable Equipment
DBV PACKAGE
(TOP VIEW)
DCK PACKAGE
(TOP VIEW)
OE
1
A
2
5
V_CC
OE
1
5
V_CC
A
2
GND
3
4B
GND
3
4
B
See mechanical drawings for dimensions.
DESCRIPTION/ORDERING INFORMATION
The SN74CB3T1G125 is a high-speed TTL-compatible FET bus switch with low ON-state resistance (r_on),
allowing for minimal propagation delay. The device fully supports mixed-mode signal operation on all data I/O
ports by providing voltage translation that tracks V_CC. The SN74CB3T1G125 supports systems using 5-V TTL,
3.3-V LVTTL, and 2.5-V CMOS switching standards, as well as user-defined switching levels (see Figure 1).
The SN74CB3T1G125 is a 1-bit bus switch with a single ouput-enable (OE) input. When OE is low, the bus
switch is ON, and the A port is connected to the B port, allowing bidirectional data flow between ports. When OE
is high, the bus switch is OFF, and a high-impedance state exists between the A and B ports.
T_A
–40°C to 85°C
ORDERING INFORMATION
PACKAGE ⁽¹⁾
ORDERABLE PART NUMBER
SOT (SOT-23) – DBV
Reel of 3000
SN74CB3T1G125DBVR
SOT (SC-70) – DCK
Reel of 3000
SN74CB3T1G125DCKR
TOP-SIDE MARKING⁽²⁾
W25_
WM_
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
(2) The actual top-side marking has one additional character that designates the assembly/test site.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2003–2006, Texas Instruments Incorporated