FEATURES
· Member of the Texas Instruments Widebus™
Family
· UBT™ (Universal Bus Transceiver) Combines
D-Type Latches and D-Type Flip-Flops for
Operation in Transparent, Latched, Clocked,
or Clock-Enabled Modes
· EPIC™ (Enhanced-Performance Implanted
CMOS) Submicron Process
· ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
· Latch-Up Performance Exceeds 250 mA Per
JESD 17
· Bus Hold on Data Inputs Eliminates the Need
for External Pullup/Pulldown Resistors
· Package Options Include Plastic 300-mil
Shrink Small-Outline (DL) and Thin Shrink
Small-Outline (DGG) Packages

DESCRIPTION
This 18-bit universal bus transceiver is designed for
1.65-V to 3.6-V VCC operation.
The SN74ALVCH16601 combines D-type latches and
D-type flip-flops to allow data flow in transparent,
latched, and clocked modes.
Data flow in each direction is controlled by
output-enable (OEAB and OEBA), latch-enable
(LEAB and LEBA), and clock (CLKAB and CLKBA)
inputs. The clock can be controlled by the
clock-enable (CLKENAB and CLKENBA) 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. Output enable OEAB is active low. When
OEAB is low, the outputs are active. When OEAB is
high, 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, CLKBA, and CLKENBA.
To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
The SN74ALVCH16601 is characterized for operation from -40°C to 85°C.