SN74CB3T3125_15 Datasheet, PDF (1/20 Pages) Texas Instruments – QUADRUPLE FET BUS SWITCH 2.5-V/3.3-V LOW-VOLTAGE BUS SWITCH WITH 5-V-TOLERANT LEVEL SHIFTER

SN74CB3T3125
www.ti.com
SCDS120B – FEBRUARY 2003 – REVISED AUGUST 2012
QUADRUPLE FET BUS SWITCH
2.5-V/3.3-V LOW-VOLTAGE BUS SWITCH WITH 5-V-TOLERANT LEVEL SHIFTER
Check for Samples: SN74CB3T3125
FEATURES
1
• 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) = 4.5 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
DGV OR PW PACKAGE
(TOP VIEW)
1OE 1
1A 2
1B ³
2OE 4
2A 5
2B 6
GND 7
14 V_CC
13 4OE
12 _4A
11 4B
10 3OE
9 3A
8 3B
RGY PACKAGE
(TOP VIEW)
1OE ^VCC
1
1A 2
1B 3
2OE 4
2A ⁵
2B ⁶
7
14
13 4OE
12 4A
11 _4B
10 _3OE
9 _3A
8
GND 3B
DESCRIPTION
The SN74CB3T3125 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 SN74CB3T3125 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).
1
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 © 2003–2012, Texas Instruments Incorporated