1. General description
The 74ALVCH16652 consists of 16 non-inverting bus transceiver circuits with 3-state outputs, Dtype
flip-flops and control circuitry arranged for multiplexed transmission of data directly from the
data bus or from the internal storage registers.
Data on the ‘A’ or ‘B’, or both buses, will be stored in the internal registers, at the appropriate clock
inputs (nCPAB or nCPBA) regardless of the select inputs (nSAB and nSBA) or output enable
(nOEAB and nOEBA) control inputs.
Depending on the select inputs nSAB and nSBA data can directly go from input to output (real-time
mode) or data can be controlled by the clock (storage mode), when OE inputs permit this operating
mode.
The output enable inputs nOEAB and nOEBA determine the operation mode of the transceiver.
When nOEAB is LOW, no data transmission from nBn to nAn is possible and when nOEBA is
HIGH, no data transmission from nBn to nAn is possible.
When nSAB and nSBA are in the real-time transfer mode, it is also possible to store data without
using the internal D-type flip-flops by simultaneously enabling nOEAB and nOEBA. In this
configuration each output reinforces its input.
Active bus hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
2. Features and benefits
• Wide supply voltage range of 1.2 V to 3.6 V
• CMOS low power consumption
• Direct interface with TTL levels
• Current drive ±24 mA at VCC = 3.0 V.
• MULTIBYTE flow-through standard pin-out architecture
• Low inductance multiple VCC and GND pins for minimum noise and ground bounce
• All data inputs have bushold
• Output drive capability 50 Ω transmission lines at 85 °C
• Complies with JEDEC standards:
• JESD8-5 (2.3 V to 2.7 V)
• JESD8B/JESD36 (2.7 V to 3.6 V)
• ESD protection:
• HBM ANSI/ESDA/JEDEC JS-001 exceeds 2000 V
• CDM JESD22-C101E exceeds 1000 V