Document
74AVCH8T245
8-bit dual supply translating transceiver with configurable voltage translation; 3-state
Rev. 5 — 27 December 2012
Product data sheet
1. General description
The 74AVCH8T245 is an 8-bit, dual supply transceiver that enables bidirectional level translation. It features two 8-bit input-output ports (An and Bn), a direction control input (DIR), a output enable input (OE) and dual supply pins (VCC(A) and VCC(B)). Both VCC(A) and VCC(B) can be supplied at any voltage between 0.8 V and 3.6 V making the device suitable for translating between any of the low voltage nodes (0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V and 3.3 V). Pins An, OE and DIR are referenced to VCC(A) and pins Bn are referenced to VCC(B). A HIGH on DIR allows transmission from An to Bn and a LOW on DIR allows transmission from Bn to An. The output enable input (OE) can be used to disable the outputs so the buses are effectively isolated.
The device is fully specified for partial power-down applications using IOFF. The IOFF circuitry disables the output, preventing any damaging backflow current through the device when it is powered down. In suspend mode when either VCC(A) or VCC(B) are at GND level, both An and Bn outputs are in the high-impedance OFF-state. The bus-hold circuitry on the powered-up side always stays active.
The 74AVCH8T245 has active bus hold circuitry which is provided to hold unused or floating data inputs at a valid logic level. This feature eliminates the need for external pull-up or pull-down resistors.
2. Features and benefits
Wide supply voltage range: VCC(A): 0.8 V to 3.6 V VCC(B): 0.8 V to 3.6 V
Complies with JEDEC standards: JESD8-12 (0.8 V to 1.3 V) JESD8-11 (0.9 V to 1.65 V) JESD8-7 (1.2 V to 1.95 V) JESD8-5 (1.8 V to 2.7 V) JESD8-B (2.7 V to 3.6 V)
ESD protection: HBM JESD22-A114E Class 3B exceeds 8000 V MM JESD22-A115-A exceeds 200 V CDM JESD22-C101C exceeds 1000 V
Maximum data rates: 380 Mbit/s ( 1.8 V to 3.3 V translation) 260 Mbit/s ( 1.1 V to 3.3 V translation)
Nexperia
74AVCH8T245
8-bit dual supply translating transceiver; 3-state
260 Mbit/s ( 1.1 V to 2.5 V translation) 210 Mbit/s ( 1.1 V to 1.8 V translation) 150 Mbit/s ( 1.1 V to 1.5 V translation) 100 Mbit/s ( 1.1 V to 1.2 V translation) Suspend mode Bus hold on data inputs Latch-up performance exceeds 100 mA per JESD 78 Class II Inputs accept voltages up to 3.6 V IOFF circuitry provides partial Power-down mode operation Multiple package options Specified from 40 C to +85 C and 40 C to +125 C
3. Ordering information
Table 1. Ordering information
Type number
Package
Temperature range Name
Description
Version
74AVCH8T245PW 40 C to +125 C TSSOP24 plastic thin shrink small outline package; 24 leads; body width 4.4 mm
SOT355-1
74AVCH8T245BQ 40 C to +125 C
DHVQFN24 plastic dual in-line compatible thermal enhanced very SOT815-1 thin quad flat package; no leads; 24 terminals; body 3.5 5.5 0.85 mm
4. Functiona.