SN74ALVCH32501_13 Datasheet, PDF (1/14 Pages) Texas Instruments – 36-BIT UNIVERSAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS

www.ti.com
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 Mode
• Operates From 1.65 V to 3.6 V
• Max t_pd of 3.9 ns at 3.3 V
SN74ALVCH32501
36-BIT UNIVERSAL BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
SCES144G – OCTOBER 1998 – REVISED OCTOBER 2004
• ±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 36-bit universal bus transceiver is designed for 1.65-V to 3.6-V V_CC operation.
This device can be used as two 18-bit transceivers or one 36-bit transceiver. 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).
To ensure the high-impedance state during power up or power down, OEBA should be tied to V_CC through a
pullup resistor, and OEAB should be tied to GND through a pulldown resistor; the minimum value of the resistor
is determined by the current-sinking capability of the driver.
Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors
with the bus-hold circuitry is not recommended.
T_A
-40°C to 85°C
ORDERING INFORMATION
PACKAGE ⁽¹⁾
ORDERABLE PART NUMBER
LFBGA - GKF
Tape and reel
LFBGA - ZKF (Pb-free)
SN74ALVCH32501KR
74ALVCH32501ZKFR
TOP-SIDE MARKING
ACH501
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Widebus+, UBT are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 1998–2004, Texas Instruments Incorporated