74CB3T16211 Series

3.3-V, 1:1 (SPST), 24-channel FET bus switch with level shifter

Catalog(4 parts)

Part	Independent Circuits▲▼	Operating Temperature▲▼	Operating Temperature▲▼	Mounting Type	Type	Supplier Device Package	Voltage Supply Source	Voltage - Supply▲▼	Voltage - Supply▲▼	Package / Case	Package / Case▲▼	Package / Case▲▼	Circuit	Circuit▲▼	Package / Case▲▼	Package / Case▲▼
Texas Instruments SN74CB3T16211DGGR Bus Switch 12 x 1:1 56-TSSOP	2 ul	-40 °C	85 °C	Surface Mount	Bus Switch	56-TSSOP	Single Supply	3.5999999046325684 V	2.299999952316284 V	56-TFSOP	0.006099999882280827 m	0.006095999851822853 m	1:1	12 ul
Texas Instruments SN74CB3T16211DLR Bus Switch 12 x 1:1 56-SSOP	2 ul	-40 °C	85 °C	Surface Mount	Bus Switch	56-SSOP	Single Supply	3.5999999046325684 V	2.299999952316284 V	56-BSSOP			1:1	12 ul	0.007493000011891127 m	0.007499999832361937 m
Texas Instruments 74CB3T16211DGGRE4 Bus Switch 12 x 1:1 56-TSSOP	2 ul	-40 °C	85 °C	Surface Mount	Bus Switch	56-TSSOP	Single Supply	3.5999999046325684 V	2.299999952316284 V	56-TFSOP	0.006099999882280827 m	0.006095999851822853 m	1:1	12 ul
Texas Instruments SN74CB3T16211ZQLR Bus Switch 12 x 1:1 56-BGA Microstar Junior (7x4.5)	2 ul	-40 °C	85 °C	Surface Mount	Bus Switch	56-BGA Microstar Junior (7x4.5)	Single Supply	3.5999999046325684 V	2.299999952316284 V	56-VFBGA			1:1	12 ul

Key Features

• Member of the Texas Instruments Widebus FamilyOutput Voltage Translation Tracks VCCSupports Mixed-Mode Signal Operation onAll Data I/O Ports5-V Input Down to 3.3-V Output LevelShift With 3.3-V VCC5-V/3.3-V Input Down to 2.5-V OutputLevel Shift With 2.5-V VCC5-V Tolerant I/Os With Device Powered Upor Powered DownBidirectional Data Flow With Near-ZeroPropagation DelayLow ON-State Resistance (ron) Characteristics(ron= 5 Ω Typ)Low Input/Output Capacitance MinimizesLoading (Cio(OFF)= 5 pF Typ)Data and Control Inputs ProvideUndershoot Clamp DiodesLow Power Consumption(ICC= 70 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 TTLor 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: LevelTranslation, PCI Interface, Bus IsolationIdeal for Low-Power Portable EquipmentMember of the Texas Instruments Widebus FamilyOutput Voltage Translation Tracks VCCSupports Mixed-Mode Signal Operation onAll Data I/O Ports5-V Input Down to 3.3-V Output LevelShift With 3.3-V VCC5-V/3.3-V Input Down to 2.5-V OutputLevel Shift With 2.5-V VCC5-V Tolerant I/Os With Device Powered Upor Powered DownBidirectional Data Flow With Near-ZeroPropagation DelayLow ON-State Resistance (ron) Characteristics(ron= 5 Ω Typ)Low Input/Output Capacitance MinimizesLoading (Cio(OFF)= 5 pF Typ)Data and Control Inputs ProvideUndershoot Clamp DiodesLow Power Consumption(ICC= 70 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 TTLor 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: LevelTranslation, PCI Interface, Bus IsolationIdeal for Low-Power Portable Equipment

Description

The SN74CB3T16211 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 SN74CB3T16211 supports systems using 5-V TTL, 3.3-V LVTTL, and 2.5-V CMOS switching standards, as well as user-defined switching levels. The I/O port of this device has a pullup current source that maintains the output voltage at VCCwhen the device is ON, and the input is greater than or equal to VCC– 1. Because of the pullup current source, the output voltage level may be less than VCCwhen the operating frequency is low and the I/O port is connected to a pulldown resistor. In order to maintain the output voltage at VCC, a pullup resistor must be connected to VCCinstead of a pulldown resistor to ground. The SN74CB3T16211 is organized as two 12-bit bus switches with separate output-enable (1OE, 2OE) inputs. It can be used as two 12-bit bus switches or as one 24-bit bus switch. WhenOEis low, the associated 12-bit bus switch is ON, and the A port is connected to the B port, allowing bidirectional data flow between ports. WhenOEis high, the associated 12-bit bus switch is OFF, 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,OEshould be tied to VCCthrough a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. The SN74CB3T16211 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 SN74CB3T16211 supports systems using 5-V TTL, 3.3-V LVTTL, and 2.5-V CMOS switching standards, as well as user-defined switching levels. The I/O port of this device has a pullup current source that maintains the output voltage at VCCwhen the device is ON, and the input is greater than or equal to VCC– 1. Because of the pullup current source, the output voltage level may be less than VCCwhen the operating frequency is low and the I/O port is connected to a pulldown resistor. In order to maintain the output voltage at VCC, a pullup resistor must be connected to VCCinstead of a pulldown resistor to ground. The SN74CB3T16211 is organized as two 12-bit bus switches with separate output-enable (1OE, 2OE) inputs. It can be used as two 12-bit bus switches or as one 24-bit bus switch. WhenOEis low, the associated 12-bit bus switch is ON, and the A port is connected to the B port, allowing bidirectional data flow between ports. WhenOEis high, the associated 12-bit bus switch is OFF, 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,OEshould be tied to VCCthrough a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.