FEATURES

· Member of the Texas Instruments Widebus™

Family

· UBT™ Transceiver Combines D-Type Latches

and D-Type Flip-Flops for Operation in

Transparent, Latched, or Clocked Modes

· Operates From 1.65 V to 3.6 V

· Max tpd of 3.9 ns at 3.3 V

· ±24-mA Output Drive at 3.3 V

· Bus Hold on Data Inputs Eliminates the Need

for External Pullup/Pulldown Resistors

· Latch-Up Performance Exceeds 250 mA Per

JESD 17

· ESD Protection Exceeds JESD 22

- 2000-V Human-Body Model (A114-A)

- 200-V Machine Model (A115-A)

DESCRIPTION/ORDERING INFORMATION

This 18-bit universal bus transceiver is designed for

1.65-V to 3.6-V VCC operation.

Data flow in each direction is controlled by

output-enable (OEAB and OEBA), latch-enable

(LEAB and LEBA), and clock (CLKAB and CLKBA)

inputs. For A-to-B data flow, the device operates in

the transparent mode when LEAB is high. When

LEAB is low, the A data is latched if CLKAB is held at

a high or low logic level. If LEAB is low, the A data is

stored in the latch/flip-flop on the low-to-high

transition of CLKAB. When OEAB is high, the outputs

are active. When OEAB is low, the outputs are in the

high-impedance state.

Data flow for B to A is similar to that of A to B, but uses OEBA, LEBA, and CLKBA. The output enables are

complementary (OEAB is active high, and OEBA is active low).