SN74LVC2952A

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具有三态输出的八通道总线收发器和寄存器

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数据表

document-pdfAcrobat SN74LVC2952A 数据表 (Rev. I) (英语)

SN74LVC2952A

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产品详情

Number of channels

8

IOL (max) (mA)

24

IOH (max) (mA)

-24

Input type

TTL/CMOS

Output type

LVTTL

Features

Balanced outputs

Technology family

LVC

Rating

Catalog

Operating temperature range (°C)

-40 to 85

Number of channels

8

IOL (max) (mA)

24

IOH (max) (mA)

-24

Input type

TTL/CMOS

Output type

LVTTL

Features

Balanced outputs

Technology family

LVC

Rating

Catalog

Operating temperature range (°C)

-40 to 85

SSOP (DB)

24

63.96 mm² (8.2 mm × 7.8 mm)

TSSOP (PW)

24

49.92 mm² (7.8 mm × 6.4 mm)

Operates From 1.65 V to 3.6 V
Inputs Accept Voltages to 5.5 V
Max t_pd of 8.2 ns at 3.3 V
Typical V_OLP (Output Ground Bounce)
<0.8 V at V_CC = 3.3 V, T_A = 25°C
Typical V_OHV (Output V_OH Undershoot)
>2 V at V_CC = 3.3 V, T_A = 25°C
Supports Mixed-Mode Signal Operation on All Ports (5-V Input/Output Voltage With 3.3-V V_CC)
I_off Supports Partial-Power-Down Mode Operation
Latch-Up Performance Exceeds 250 mA Per JESD 17
ESD Protection Exceeds JESD 22
- 2000-V Human-Body Model (A114-A)
- 1000-V Charged-Device Model (C101)

Operates From 1.65 V to 3.6 V
Inputs Accept Voltages to 5.5 V
Max t_pd of 8.2 ns at 3.3 V
Typical V_OLP (Output Ground Bounce)
<0.8 V at V_CC = 3.3 V, T_A = 25°C
Typical V_OHV (Output V_OH Undershoot)
>2 V at V_CC = 3.3 V, T_A = 25°C
Supports Mixed-Mode Signal Operation on All Ports (5-V Input/Output Voltage With 3.3-V V_CC)
I_off Supports Partial-Power-Down Mode Operation
Latch-Up Performance Exceeds 250 mA Per JESD 17
ESD Protection Exceeds JESD 22
- 2000-V Human-Body Model (A114-A)
- 1000-V Charged-Device Model (C101)

This octal bus transceiver and register is designed for 1.65-V to 3.6-V V_CC operation.

The SN74LVC2952A consists of two 8-bit back-to-back registers that store data flowing in both directions between two bidirectional buses. Data on the A or B bus is stored in the registers on the low-to-high transition of the clock (CLKAB or CLKBA) input, provided that the clock-enable (CLKENAB\ or CLKENBA)\ input is low. Taking the output-enable (OEAB\ or OEBA)\ input low accesses the data on either port.

Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of these devices as translators in a mixed 3.3-V/5-V system environment.

To ensure the high-impedance state during power up or power down, OE\ should be tied to V_CC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

This device is fully specified for partial-power-down applications using I_off. The I_off circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.

This octal bus transceiver and register is designed for 1.65-V to 3.6-V V_CC operation.

The SN74LVC2952A consists of two 8-bit back-to-back registers that store data flowing in both directions between two bidirectional buses. Data on the A or B bus is stored in the registers on the low-to-high transition of the clock (CLKAB or CLKBA) input, provided that the clock-enable (CLKENAB\ or CLKENBA)\ input is low. Taking the output-enable (OEAB\ or OEBA)\ input low accesses the data on either port.

Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of these devices as translators in a mixed 3.3-V/5-V system environment.

To ensure the high-impedance state during power up or power down, OE\ should be tied to V_CC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

This device is fully specified for partial-power-down applications using I_off. The I_off circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.

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