74LVT244B 데이터 시트보기 (PDF) - Philips Electronics

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74LVT244B

3.3V Octal buffer/line driver 3-State

Philips Electronics 

74LVT244B; 74LVTH244B

3.3 V octal buffer/line driver; 3-state

Rev. 03 — 3 March 2006

Product data sheet

1. General description

The 74LVT244B; 74LVTH244B is a high-performance BiCMOS product designed for VCC

operation at 3.3 V.

This device is an octal buffer that is ideal for driving bus lines. The device features two

output enable inputs (1OE and 2OE), each controlling four of the 3-state outputs.

2. Features

I Octal bus interface

I 3-state buffers

I Speed upgrade of 74LVT244A

I Output capability: +64 mA and −32 mA

I TTL input and output switching levels

I Input and output interface capability to systems at 5 V supply

I Bus hold data inputs eliminate need for external pull-up resistors to hold unused inputs

I Power-up 3-state

I Live insertion and extraction permitted

I No bus current loading when output is tied to 5 V bus

I Latch-up protection:

N JESD78: exceeds 500 mA

I ESD protection:

N HBM EIA/JESD22-A114-C exceeds 2000 V

N MM EIA/JESD22-A115-A 200 V

3. Quick reference data

Table 1. Quick reference data

GND = 0 V; Tamb = 25 °C.

Symbol Parameter

Conditions

tPLH

LOW-to-HIGH propagation CL = 50 pF; VCC = 3.3 V

delay nAn to nYn

tPHL

HIGH-to-LOW propagation CL = 50 pF; VCC = 3.3 V

delay nAn to nYn

Min Typ Max Unit

-

1.9 -

ns

-

2.0 -

ns

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