|74ALVCH162268ZQLR||12-BIT TO 24-BIT REGISTERED BUS EXCHANGER WITH 3-STATE OUTPUTS|
|74ALVCH162268ZQLR Datasheet PDF : 18 Pages |
12-BIT TO 24-BIT REGISTERED BUS EXCHANGER
WITH 3-STATE OUTPUTS
SCES018L – AUGUST 1995 – REVISED SEPTEMBER 2004
• Member of the Texas Instruments Widebus™
DGG OR DL PACKAGE
• Operates From 1.65 V to 3.6 V
• Max tpd of 4.8 ns at 3.3 V
• ±24-mA Output Drive at 3.3 V
• B-Port Outputs Have Equivalent 26-Ω Series
Resistors, So No External Resistors Are
• Bus Hold on Data Inputs Eliminates the Need
for External Pullup/Pulldown Resistors
• Latch-Up Performance Exceeds 250 mA Per
• ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
This 12-bit to 24-bit registered bus exchanger is
designed for 1.65-V to 3.6-V VCC operation.
The SN74ALVCH162268 is used for applications in
which data must be transferred from a narrow
high-speed bus to a wide, lower-frequency bus.
The device provides synchronous data exchange
between the two ports. Data is stored in the internal
registers on the low-to-high transition of the clock
(CLK) input when the appropriate clock-enable
(CLKEN) inputs are low. The select (SEL) line is
synchronous with CLK and selects 1B or 2B input
data for the A outputs.
For data transfer in the A-to-B direction, a two-stage pipeline is provided in the A-to-1B path, with a single
storage register in the A-to-2B path. Proper control of these inputs allows two sequential 12-bit words to be
presented synchronously as a 24-bit word on the B port. Data flow is controlled by the active-low output enables
(OEA, OEB). These control terminals are registered, so bus direction changes are synchronous with CLK.
The B outputs, which are designed to sink up to 12 mA, include equivalent 26-Ω resistors to reduce overshoot
-40°C to 85°C
ORDERABLE PART NUMBER
SSOP - DL
Tape and reel
TSSOP - DGG
Tape and reel
VFBGA - GQL
VFBGA - ZQL (Pb-free)
Tape and reel
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
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 is a trademark 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 © 1995–2004, Texas Instruments Incorporated
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