Datasheet

DBQ, DGV, DW, OR PW PACKAGE
(TOP VIEW)
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NC
A1
A2
A3
A4
A5
A6
A7
A8
GND
V
CC
OE
B1
B2
B3
B4
B5
B6
B7
B8
NC − No internal connection
SN74CB3T3245
www.ti.com SCDS136A –OCTOBER 2003–REVISED AUGUST 2012
8-BIT FET BUS SWITCH
2.5-V/3.3-V LOW-VOLTAGE WITH 5-V-TOLERANT LEVEL SHIFTER
Check for Samples: SN74CB3T3245
1
FEATURES
• Low Power Consumption (I
CC
= 40 μA Max)
• V
CC
Operating Range From 2.3 V to 3.6 V
• Standard '245-Type Pinout
• Data I/Os Support 0- to 5-V Signaling Levels
• Output Voltage Translation Tracks V
CC
(0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, 5 V)
• Supports Mixed-Mode Signal Operation on All
• Control Inputs Can Be Driven by TTL or 5-
Data I/O Ports
V/3.3-V CMOS Outputs
– 5-V Input Down to 3.3-V Output Level Shift
• I
off
Supports Partial-Power-Down Mode
With 3.3-V V
CC
Operation
– 5-V/3.3-V Input Down to 2.5-V Output Level
• Latch-Up Performance Exceeds 250 mA
Shift With 2.5-V V
CC
Per JESD 17
• 5-V-Tolerant I/Os With Device Powered Up or
• ESD Performance Tested Per JESD 22
Powered Down
– 2000-V Human-Body Model (A114-B,
• Bidirectional Data Flow With Near-Zero
Class II)
Propagation Delay
– 1000-V Charged-Device Model (C101)
• Low ON-State Resistance (r
on
) Characteristics
(r
on
= 5 Ω Typ)
• Supports Digital Applications: Level
Translation, PCI Interface, USB Interface,
• Low Input/Output Capacitance Minimizes
Memory Interleaving, Bus Isolation
Loading (C
io(OFF)
= 5 pF Typ)
• Ideal for Low-Power Portable Equipment
• Data and Control Inputs Provide Undershoot
Clamp Diodes
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).
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.
Copyright © 2003–2012, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.