SN74CB3T16210
20-BIT FET BUS SWITCH
2.5-V/3.3-V LOW-VOLTAGE BUS SWITCH WITH 5-V-TOLERANT LEVEL SHIFTER
www.ti.com
SCDS156A–OCTOBER 2003–REVISED MARCH 2005
FEATURES
DGG OR DGV PACKAGE
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Member of the Texas Instruments Widebus™
(TOP VIEW)
Family
1OE
2OE
1B1
1B2
1B3
1B4
1B5
GND
1B6
1B7
1B8
1B9
1B10
2B1
2B2
2B3
GND
2B4
2B5
2B6
2B7
2B8
2B9
2B10
NC
1A1
1A2
1A3
1A4
1A5
1A6
GND
1A7
1
2
3
4
5
6
7
8
9
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
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Output Voltage Translation Tracks VCC
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 VCC
– 5-V/3.3-V Input Down to 2.5-V Output Level
Shift With 2.5-V VCC
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5-V-Tolerant I/Os With Device Powered Up or
Powered Down
1A8 10
1A9
1A10
2A1
11
12
13
Bidirectional Data Flow With Near-Zero
Propagation Delay
Low ON-State Resistance (ron) Characteristics
(ron = 5 Ω Typ)
2A2 14
15
V
CC
Low Input/Output Capacitance Minimizes
Loading (Cio(OFF) = 5 pF Typ)
2A3 16
GND 17
2A4
Data and Control Inputs Provide Undershoot
Clamp Diodes
18
2A5 19
2A6 20
2A7 21
2A8 22
2A9 23
2A10 24
Low Power Consumption
(ICC = 40 µA Max)
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VCC 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)
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Control Inputs Can Be Driven by TTL or
5-V/3.3-V CMOS Outputs
NC - No internal connection
Ioff 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)
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Supports Digital Applications: Level
Translation, PCI Interface, USB Interface,
Memory Interleaving, and Bus Isolation
Ideal for Low-Power Portable Equipment
DESCRIPTION/ORDERING INFORMATION
The SN74CB3T16210 is a high-speed TTL-compatible FET bus switch with low ON-state resistance (ron),
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 VCC. The SN74CB3T16210 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.
Widebus is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright © 2003–2005, 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.