SN54LVTH2952, SN74LVTH2952 3.3-V ABT OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS

SCBS710C - OCTOBER 1997 - REVISED APRIL 1998

features

State-of-the-Art Advanced BiCMOS Technology (ABT) Design for 3.3-V Operation and Low Static Power Dissipation
High-Impedance State During Power Up and Power Down
Bus-Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors
Support Mixed-Mode Signal Operation (5-V Input and Output Voltages With 3.3-V V_CC)
Support Unregulated Battery Operation Down to 2.7 V
Power Off Disables Outputs, Permitting Live Insertion
Typical V_OLP (Output Ground Bounce) < 0.8 V at V_CC = 3.3 V, T_A = 25°C
Latch-Up Performance Exceeds 500 mA Per JESD 17
ESD Protection Exceeds 2000 V Per MIL-STD-883, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0)
Package Options Include Plastic Small-Outline (DW), Shrink Small-Outline (DB), Thin Shrink Small-Outline (PW), and Thin Very Small-Outline (DGV) Packages, Ceramic Chip Carriers (FK), and Ceramic (JT) DIPs

description

These octal bus transceivers and registers are designed specifically for low-voltage (3.3-V) V_CC operation, but with the capability to provide a TTL interface to a 5-V system environment.

The 'LVTH2952 devices consist 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.

Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.

When V_CC is between 0 and 1.5 V, the device is in the high-impedance state during power up or power down. However, to ensure the high-impedance state above 1.5 V, 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.

The SN54LVTH2952 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74LVTH2952 is characterized for operation from -40°C to 85°C.

^† A-to-B data flow is shown; B-to-A data flow is similar but uses CLKENBA\, CLKBA, and OEBA\.

^‡ Level of B before the indicated steady-state input conditions were established

Title: 3.3-V ABT OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
Product Family: REGISTERED TRANSCEIVERS
Device Functionality: OCTAL BUS TRANSCEIVER AND REGISTER
Orderable Devices: SN74LVTH2952DBLE, SN74LVTH2952DGVR, SN74LVTH2952DW, SN74LVTH2952DWR, SN74LVTH2952PWLE

View the complete PDF datasheet: scbs710c.pdf (121 K Bytes) (Requires Acrobat Reader 3.x)

View more information about generic part numbers:SN74LVTH2952

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