1. General description

The 74ALVCH16501 is an 18-bit universal transceiver with bus hold inputs and 3-state outputs.

Data flow in each direction is controlled by output enable (OEAB and OEBA), latch enable (LEAB

and LEBA), and clock (CPAB and CPBA) 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 CPAB is held

at a HIGH or 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 CPAB. 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 CPBA. The output enables are complimentary (OEAB is active HIGH

and OEBA is active LOW). This device is fully specified for partial power down applications using

IOFF. The IOFF circuitry disables the output, preventing the potentially damaging backflow current

through the device when it is powered down.

2. Features and benefits

? Wide supply voltage range from 1.2 V to 3.6 V

? CMOS low power dissipation

? Direct interface with TTL levels

? Current drive ±24 mA at VCC = 3.0 V

? Universal bus transceiver with D-type latches and D-type flip-flops capable of operating in

transparent, latched or clocked mode

? Bus hold on all data inputs

? Output drive capability 50 Ω transmission lines at 85 °C

? 3-state non-inverting outputs for bus-oriented applications

? Latch-up performance exceeds 100 mA per JESD78 Class II Level B

? Complies with JEDEC standards:

? JESD8-7 (1.65 V to 1.95 V)

? JESD8-5 (2.3 V to 2.7 V)

? JESD8C (2.7 V to 3.6 V)

? ESD protection:

? HBM JESD22-A114F exceeds 2000 V

? MM JESD22-A115-B exceeds 200 V

? Specified from -40 °C to +85 °C

74ALVCH16501DGG屬于集成電路（IC） > 通用總線功能。安世半導(dǎo)體(中國(guó))有限公司制造生產(chǎn)的74ALVCH16501DGG通用總線功能通用總線功能系列產(chǎn)品是元件級(jí)產(chǎn)品，用于處理或操作一系列（通常為 8 個(gè)或更多）并行邏輯信號(hào)（稱為總線）。所執(zhí)行的功能包括臨時(shí)存儲(chǔ)要發(fā)送或接收的數(shù)據(jù)，執(zhí)行緩沖以允許輸出電流容量有限的器件（例如微處理器）通過遠(yuǎn)距離互連高速傳輸數(shù)據(jù)，以及調(diào)換或移動(dòng)總線內(nèi)的位順序等。