74ALVCH32973EC,518

74ALVCH32973 16-bit bus transceiver and transparant D-type latch with 8 independent buffers Rev. 3 — 17 January 2013 Product data sheet 1. General description The 74ALVCH32973 is a 16-bit bus transceiver and transparent D-type latch with 8 independent buffers with bus hold inputs and 3-state outputs. It features direction (1DIR, 2DIR), latch enable (1LOE, 2LOE), transceiver output enable (1TOE, 2TOE) and latch enable (1LE, 2LE) control inputs; four 8-bit transceiver ports (1An, 2An & 1Bn, 2Bn); two 8-bit D-type latch output ports (1Qn, 2Qn) and an 8-bit buffer with data inputs Dn and outputs Yn. The configuration of the control pins allows the device to be used as one 8-bit buffer, two 8-bit transceivers, and two 8-bit latches or one 8-bit buffer, one 16-bit transceiver and one 16-bit latch. The 8-bit buffer functions independently of the control inputs. The direction of data transmission between A and B is controlled by nDIR and when nTOE is set HIGH the A and B ports will assume a HIGH-impedance OFF-state, they will be effectively isolated. When nLE is HIGH, data at the A inputs enter the latches. In this condition the latches are transparent, a Q output will change each time its corresponding A-input changes. When nLE is LOW the latches store the information that was present at the inputs a set-up time preceding the HIGH-to-LOW transition of nLE. A HIGH on nLOE causes the Q outputs to assume a high-impedance OFF-state. Operation of the nLOE input does not affect the state of the latches. 2. Features and benefits        Wide supply voltage range from 1.2 V to 3.6 V Complies with JEDEC standard JESD8-B CMOS low power consumption Direct interface with TTL levels All data inputs have bus hold Output drive capability 50  transmission lines at 85 C Current drive 24 mA at VCC = 3.0 V 74ALVCH32973 Nexperia 16-bit bus transceiver and transparant D-type latch; 8 buffers 3. Ordering information Table 1. Ordering information Type number Temperature range 74ALVCH32973EC 40 C to +85 C Package Name Description Version LFBGA96 plastic low profile fine-pitch ball grid array package; 96 balls; body 13.5  5.5  1.05 mm SOT536-1 4. Functional diagram $ ',5 - 72( $ 72( $ $ - % ' 4 4 ',5 $ % $ $ ' /$7&+  /( + + /( /( 7 /2( 7