器件名称: 74ALVCH162268ZQLR
功能描述: 12-BIT TO 24-BIT REGISTERED BUS EXCHANGER WITH 3-STATE OUTPUTS
文件大小: 476.69KB 共18页
简 介:www.ti.com
SN74ALVCH162268 12-BIT TO 24-BIT REGISTERED BUS EXCHANGER WITH 3-STATE OUTPUTS
SCES018L – AUGUST 1995 – REVISED SEPTEMBER 2004
FEATURES
Member of the Texas Instruments Widebus Family 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- Series Resistors, So No External Resistors Are Required 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)
DGG OR DL PACKAGE (TOP VIEW)
DESCRIPTION/ORDERING INFORMATION
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 24 33 between the two ports. Data is stored in the internal 25 32 registers on the low-to-high transition of the clock 26 31 (CLK) input when the appropriate clock-enable 27 30 (CLKEN) inputs are low. The select (SEL) line is synchronous with CLK and selects 1B or 2B input 28 29 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 synchronou……
