74CB3T3257 Series
3.3-V, 2:1 (SPDT), 4-channel FET bus switch with level shifter
Manufacturer: Texas Instruments
Catalog(3 parts)
| Part | Operating Temperature▲▼ | Operating Temperature▲▼ | Independent Circuits▲▼ | Package / Case▲▼ | Package / Case | Package / Case▲▼ | Voltage Supply Source | Type | Mounting Type | Circuit▲▼ | Circuit | Supplier Device Package | Voltage - Supply▲▼ | Voltage - Supply▲▼ | Package / Case▲▼ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
-40 °C | 85 °C | 1 ul | 0.004394200164824724 m | 16-TSSOP | 0.004399999976158142 m | Single Supply | Multiplexer/Demultiplexer | Surface Mount | 4 ul | 2:1 | 16-TSSOP | 3.5999999046325684 V | 2.299999952316284 V | ||
-40 °C | 85 °C | 1 ul | 16-TFSOP | Single Supply | Multiplexer/Demultiplexer | Surface Mount | 4 ul | 2:1 | 16-TVSOP | 3.5999999046325684 V | 2.299999952316284 V | 0.004394200164824724 m, 0.004399999976158142 m | |||
-40 °C | 85 °C | 1 ul | 0.004394200164824724 m | 16-TSSOP | 0.004399999976158142 m | Single Supply | Multiplexer/Demultiplexer | Surface Mount | 4 ul | 2:1 | 16-TSSOP | 3.5999999046325684 V | 2.299999952316284 V |
Key Features
• Output Voltage Translation Tracks VCCSupports Mixed-Mode Signal Operation On All Data I/O Ports5-V Input Down To 3.3-V Output Level Shift With 3.3-V VCC5-V/3.3-V Input Down To 2.5-V Output Level Shift With 2.5-V VCC5-V Tolerant I/Os With Device Powered-Up or Powered-DownBidirectional Data Flow, With Near-Zero Propagation DelayLow ON-State Resistance (ron) Characteristics (ron= 5Typical)Low Input/Output Capacitance Minimizes Loading (Cio(OFF) = 5 pF Typical)Data and Control Inputs Provide Undershoot Clamp DiodesLow Power Consumption (ICC= 20 µA Max)VCCOperating Range From 2.3 V to 3.6 VData 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 OutputsIoffSupports Partial-Power-Down Mode OperationLatch-Up Performance Exceeds 250 mA Per JESD 17ESD Performance Tested Per JESD 222000-V Human-Body Model (A114-B, Class II)1000-V Charged-Device Model (C101)Supports Digital Applications: Level Translation, USB Interface, Memory Interleaving, Bus IsolationIdeal for Low-Power Portable EquipmentOutput Voltage Translation Tracks VCCSupports Mixed-Mode Signal Operation On All Data I/O Ports5-V Input Down To 3.3-V Output Level Shift With 3.3-V VCC5-V/3.3-V Input Down To 2.5-V Output Level Shift With 2.5-V VCC5-V Tolerant I/Os With Device Powered-Up or Powered-DownBidirectional Data Flow, With Near-Zero Propagation DelayLow ON-State Resistance (ron) Characteristics (ron= 5Typical)Low Input/Output Capacitance Minimizes Loading (Cio(OFF) = 5 pF Typical)Data and Control Inputs Provide Undershoot Clamp DiodesLow Power Consumption (ICC= 20 µA Max)VCCOperating Range From 2.3 V to 3.6 VData 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 OutputsIoffSupports Partial-Power-Down Mode OperationLatch-Up Performance Exceeds 250 mA Per JESD 17ESD Performance Tested Per JESD 222000-V Human-Body Model (A114-B, Class II)1000-V Charged-Device Model (C101)Supports Digital Applications: Level Translation, USB Interface, Memory Interleaving, Bus IsolationIdeal for Low-Power Portable Equipment
Description
AI
The SN74CB3T3257 is a high-speed TTL-compatible FET multiplexer/demultiplexer 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 SN74CB3T3257 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).
The SN74CB3T3257 is a 4-bit 1-of-2 multiplexer/demultiplexer with a single output-enable (OE)\ input. The select (S) input controls the data path of the multiplexer/demultiplexer. When OE\ is low, the multiplexer/demultiplexer is enabled, and the A port is connected to the B port, allowing bidirectional data flow between ports. When OE\ is high, the multiplexer/demultiplexer is disabled, and a high-impedance state exists between the A and B ports.
This device is fully specified for partial-power-down applications using Ioff. The Iofffeature ensures that damaging current will not backflow through the device when it is powered down. The device has isolation during power off.
To ensure the high-impedance state during power up or power down, OE\ should be tied to VCCthrough a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
The SN74CB3T3257 is a high-speed TTL-compatible FET multiplexer/demultiplexer 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 SN74CB3T3257 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).
The SN74CB3T3257 is a 4-bit 1-of-2 multiplexer/demultiplexer with a single output-enable (OE)\ input. The select (S) input controls the data path of the multiplexer/demultiplexer. When OE\ is low, the multiplexer/demultiplexer is enabled, and the A port is connected to the B port, allowing bidirectional data flow between ports. When OE\ is high, the multiplexer/demultiplexer is disabled, and a high-impedance state exists between the A and B ports.
This device is fully specified for partial-power-down applications using Ioff. The Iofffeature ensures that damaging current will not backflow through the device when it is powered down. The device has isolation during power off.
To ensure the high-impedance state during power up or power down, OE\ should be tied to VCCthrough a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.