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属于集成电路（IC） > 通用总线功能。安世半导体(中国)有限公司制造生产的74ALVCH16501DGG通用总线功能通用总线功能系列产品是元件级产品，用于处理或操作一系列（通常为 8 个或更多）并行逻辑信号（称为总线）。所执行的功能包括临时存储要发送或接收的数据，执行缓冲以允许输出电流容量有限的器件（例如微处理器）通过远距离互连高速传输数据，以及调换或移动总线内的位顺序等。