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74AHCT245APW

更新时间： 2024-11-25 01:16:07

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74AHCT245APW 数据手册

74AHCT245A

Octal bus transceiver; 3-state

Rev. 2 — 26 October 2016

Product data sheet

1. General description

The 74AHCT245A is an 8-bit transceiver with 3-state outputs. The device features an

output enable (OE) and send/receive (DIR) for direction control. A HIGH on OE causes

the outputs to assume a high-impedance OFF-state.

The 74AHCT245A is designed to operate over a V_CCrange from 4.5 V to 5.5 V. The inputs

are TTL compatible, which allows the device to be used to translate from 3.3 V to 5 V.

Schmitt-trigger action at all inputs makes the circuit tolerant of slower input rise and fall

times.

This device is fully specified for partial Power-down applications using I_OFF

The I_OFFcircuitry disables the output, preventing the damaging backflow current through

the device when it is powered down.

2. Features and benefits

 Direct interface with TTL levels

 Supply voltage range from 4.5 V to 5.5 V

 Typical t_pdof 3.0 ns at 5 V

 Typical V_OL(p)< 0.8 V at V_CC= 5 V, T_amb= 25 C

 Typical V_OH(v)> 2.3 V at V_CC= 5 V, T_amb= 25 C

 Supports mixed-mode voltage operation on all ports

 I_OFFcircuitry provides partial Power-down mode operation

 Latch-up performance exceeds 250 mA per JESD 78 Class II

 ESD protection:

 HBM ANSI/ESDA/JEDEC JS-001 Class 2 exceeds 3 kV

 MM JESD22-A115-A exceeds 200 V

 CDM JESD22-C101E exceeds 2 kV

 Specified from 40 C to +85 C and from 40 C to +125 C

12 3 4 5 6 7...13

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