SN74CB3T3245_10 Datasheet, PDF (1/18 Pages) Texas Instruments – 8-BIT FET BUS SWITCH 2.5-V/3.3-V LOW-VOLTAGE WITH 5-V-TOLERANT LEVEL SHIFTER

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SN74CB3T3245
8-BIT FET BUS SWITCH
2.5-V/3.3-V LOW-VOLTAGE WITH 5-V-TOLERANT LEVEL SHIFTER
SCDS136 – OCTOBER 2003 – REVISED MARCH 2005
FEATURES
• Standard '245-Type Pinout
• 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 = 40 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, PCI Interface, USB Interface,
Memory Interleaving, Bus Isolation
• Ideal for Low-Power Portable Equipment
DBQ, DGV, DW, OR PW PACKAGE
(TOP VIEW)
NC ¹
A1 ²
A2 ³
A3 ⁴
A4 ⁵
A5 ⁶
A6 ⁷
A7 ⁸
A8 ⁹
GND ¹⁰
20 V_CC
19 OE
18 B1
17 B2
16 B3
15 B4
14 B5
13 _B6
12 _B7
11 _B8
NC − No internal connection
DESCRIPTION/ORDERING INFORMATION
The SN74CB3T3245 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 SN74CB3T3245 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).
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 © 2003–2005, Texas Instruments Incorporated