Texas Instruments SN74CBT3384C Data Sheet
Summary
The SN74CBT3384C is a high-speed, TTL-compatible FET bus switch designed for critical data transfer in digital and analog systems. It facilitates bidirectional communication between ports while ensuring reliable signal integrity through low ON-state resistance ($R_{ON}$), active undershoot protection down to -2V, and robust partial-power-down capability. This switch is ideal for applications requiring precise bus isolation, such as PCI interfaces and memory circuits. The manual provides comprehensive details on its switching function, operating voltage range (4V–5.5V), low-distortion data I/O characteristics, and performance testing specifications.
Page 1 Text Content
SCDS132A − SEPTEMBER 2003 − REVISED OCTOBER 2003
Undershoot Protection for Off-Isolation on Control Inputs Can Be Driven by TTL or A and B Ports Up To −2 V 5-V/3.3-V CMOS Outputs Bidirectional Data Flow, With Near-Zero Ioff Supports Partial-Power-Down Mode Propagation Delay Operation Low ON-State Resistance (ron) Latch-Up Performance Exceeds 100 m A Per Characteristics (ron = 3 Ω Typical) JESD 78, Class II Low Input/Output Capacitance Minimizes ESD Performance Tested Per JESD 22 Loading and Signal Distortion − 2000-V Human-Body Model (Cio(OFF) = 5 p F Typical) (A114-B, Class II)
− 1000-V Charged-Device Model (C101)
Data and Control Inputs Provide Undershoot Clamp Diodes Supports Both Digital and Analog
Applications: PCI Interface, Memory
Low Power Consumption
Interleaving, Bus Isolation, Low-Distortion
(ICC = 3 µA Max)
Signal Gating
VCC Operating Range From 4 V to 5.5 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)
DB, DBQ, DGV, DW, OR PW PACKAGE
(TOP VIEW)
1OE VCC
1B1 2B5 1A1 2A5 1A2 2A4 1B2 2B4 1B3 2B3 1A3 2A3 1A4 2A2 1B4 2B2 1B5 2B1 1A5 2A1 GND 2OE
description/ordering information The SN74CBT3384C is a high-speed TTL-compatible FET bus switch with low ON-state resistance (ron), allowing for minimal propagation delay. Active Undershoot-Protection Circuitry on the A and B ports of the SN74CBT3384C provides protection for undershoot up to −2 V by sensing an undershoot event and ensuring that the switch remains in the proper OFF state. The SN74CBT3384C is organized as two 5-bit bus switches with separate output-enable (1OE, 2OE) inputs. It can be used as two 5-bit bus switches or as one 10-bit bus switch. When OE is low, the associated 5-bit 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 associated 5-bit bus switch is OFF, and the high-impedance state exists between the A and B ports.
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.
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Page Summary Contents For Texas Instruments SN74CBT3384C Data Sheet
Manual Details
| Brand | Texas Instruments |
|---|---|
| Pages | 16 |
| File Size | 334.75 KB |
| Published | July 10, 2026 |
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Frequently Asked Questions
Can I use this switch as 10 bits or two smaller groups?
It can function either as two independent 5-bit bus switches or configured as a single 10-bit bus switch.
What protection does the device offer against voltage drops?
Yes, it features Active Undershoot Protection Circuitry on ports A and B, providing defense up to −2 V.
How do I keep the device in a high-impedance state during power cycles?
You should tie the OE pin to V using a pull-up resistor to ensure proper isolation during power up or down.
What signaling voltage levels are compatible with this bus switch?
The Data I/Os support various 0 to 5 V signaling levels, including 1.8V, 3.3V, and other listed voltages.