© 2001 Fairchild Semiconductor Corporation DS500676 www.fairchildsemi.com
September 2001
Revised October 2001
74ALVC162601 Low Voltage 18-Bit Universal Bus Transceivers with 3.6V Tolerant Inputs and Outputs and 26
Ω
Series Resistors in the B-Port Outputs
74ALVC162601
Low Voltage 18-Bit Universal Bus Transceivers
with 3.6V Tolerant Inputs and Outputs
and 26
Ω Series Resistors in the B-Port Outputs
General Description
The 74ALVC162601, 18-bit universal bus transceiver, com-
bines 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 con-
trolled 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-to-
LOW logic level. If LEAB is LOW, the A bus 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 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.
The 74ALVC162601 is designed for low voltage (1.65V to
3.6V) V
CC
applications with I/O compatibility up to 3.6V.
The 74ALVC162601 is also designed with 26
Ω series
resistors in the B-Port outputs. This design reduces line
noise in applications such as memory address drivers,
clock drivers, and bus transceivers/transmitters.
Features
■ 1.65V–3.6V V
CC
supply operation
■ 3.6V tolerant inputs and outputs
■ 26
Ω series resistors in B-Port outputs
■ t
PD
(A to B)
4.3 ns max for 3.0V to 3.6V V
CC
5.1 ns max for 2.3V to 2.7V V
CC
9.2 ns max for 1.65V to 1.95V V
CC
■ Power-down high impedance inputs and outputs
■ Supports live insertion/withdrawal (Note 1)
■ Uses patented noise/EMI reduction circuitry
■ Latchup conforms to JEDEC JED78
■ ESD performance:
Human body model
> 2000V
Machine model
>200V
Note 1: To ensure the high-impedance state during power up or power
down, OE
should be tied to V
CC
through a pull-up resistor; the minimum
value of the resistor is determined by the current-sourcing capability of the
driver.
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Order Number
Package
Number
Package Description
74ALVC162601T MTD56 56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
