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HD74HC243FPEL中文资料

HD74HC243

Quad. Bus Transceivers (with noninverted 3-state outputs)

REJ03D0596–0200

(Previous ADE-205-473)

Rev.2.00

Jan 31, 2006 Description

The HD74HC243 is a noninverting buffer. Each device has one active high enable (GBA), and one active low enable (G AB). GBA enables the A output and G AB enables the B outputs. The device does not have schmitt trigger inputs. Features

? High Speed Operation: t pd = 10 ns typ (C L = 50 pF)

? High Output Current: Fanout of 15 LSTTL Loads

? Wide Operating Voltage: V CC = 2 to 6 V

? Low Input Current: 1 μA max

? Low Quiescent Supply Current: I CC (static) = 4 μA max (Ta = 25°C)

? Ordering Information

Part Name Package Type

Package Code

(Previous Code)

Package

Abbreviation

Taping Abbreviation

(Quantity)

HD74HC243P DILP-14

pin PRDP0014AB-B

(DP-14AV)

P —

HD74HC243FPEL SOP-14 pin (JEITA) PRSP0014DF-B

(FP-14DAV)

FP EL (2,000 pcs/reel)

Note: Please consult the sales office for the above package availability.

Function Table

Control Inputs Data Port Status

G AB GBA A B

H H O I

L H Z Z

H L Z Z

L L I O H : high level

L : low level

X : irrelevant

I : input

O : output

Z : high-impedance

Pin Arrangement

Logic Diagram

Absolute Maximum Ratings

Item Symbol Ratings Unit

Supply voltage range V CC –0.5 to 7.0 V Input / Output voltage V IN , V OUT –0.5 to V CC +0.5 V Input / Output diode current I IK , I OK ±20 mA Output current I O ±35 mA V CC , GND current I CC or I GND ±75 mA Power dissipation P T 500 mW Storage temperature Tstg –65 to +150 °C Note: The absolute maximum ratings are values, which must not individually be exceeded, and furthermore, no two of

which may be realized at the same time.

Recommended Operating Conditions

Item Symbol Ratings Unit Conditions

Supply voltage V CC 2 to 6 V Input / Output voltage V IN , V OUT 0 to V CC V Operating temperature Ta –40 to 85 °C 0 to 1000 V CC = 2.0 V

0 to 500 V CC = 4.5 V Input rise / fall time *1 t r , t f 0 to 400 ns V CC = 6.0 V Notes: 1. This item guarantees maximum limit when one input switches.

Waveform: Refer to test circuit of switching characteristics.

Electrical Characteristics

Ta = 25°C Ta = –40 to+85°C

Item Symbol V CC (V)

Min Typ Max Min Max

Unit

Test Conditions

2.0 1.5 — — 1.5

— 4.5 3.15 — — 3.15 — V IH

6.0 4.2 — — 4.2 —

V 2.0 — — 0.5 — 0.5 4.5 — — 1.35 — 1.35

Input voltage

V IL

6.0 — — 1.8 — 1.8

V 2.0 1.9 2.0 — 1.9 — 4.5 4.4 4.5 — 4.4 — 6.0 5.9 6.0 — 5.9 — I OH = –20 μA 4.5 4.18 — — 4.13 — I OH = –6 mA V OH

6.0 5.68 — — 5.63

— V Vin = V IH or V IL I OH = –7.8 mA

2.0 — 0.0 0.1 —

0.1 4.5 — 0.0 0.1 — 0.1 6.0 — 0.0 0.1 — 0.1 I OL = 20 μA 4.5 — — 0.26 — 0.33 I OL = 6 mA Output voltage V OL

6.0 — — 0.26 —

0.33 V Vin = V IH or V IL I OL = 7.8 mA Off-state output current

I OZ 6.0

— — ±0.5 — ±5.0 μA Vin = V IH or V IL ,

Vout = V CC or GND

Input current Iin 6.0 — — ±0.1 — ±1.0 μA Vin = V CC or GND

Quiescent supply current I CC 6.0

— — 4.0 — 40 μA Vin = V CC or GND, Iout = 0 μA

Switching Characteristics

(C L = 50 pF, Input t r = t f = 6 ns)

Ta = 25°C Ta = –40 to +85°C

Item Symbol V CC (V)

Min Typ Max Min Max

Unit

Test Conditions

2.0 — — 90 — 115 4.5 — 10 18 — 23 t PHL

6.0 — — 15 — 20 ns 2.0 — — 90 — 115 4.5 — 10 18 — 23 Propagation delay

time

t PLH

6.0 — — 15 — 20 ns 2.0 — — 150 — 190 4.5 — 14 30 — 38 t ZL

6.0 — — 26 — 33 ns 2.0 — — 150 — 190 4.5 — 15 30 — 38 Output enable time t ZH

6.0 — — 26 — 33 ns 2.0 — — 150 — 190 4.5 — 18 30 — 38 t LZ

6.0 — — 26 — 33 ns 2.0 — — 150 — 190 4.5 — 20 30 — 38 Output disable

time

t HZ

6.0 — — 26 —

33 ns 2.0 — — 60 —

75 4.5 — 4 12 — 15 Output rise/fall time

t TLH t THL 6.0 — — 10 — 13 ns Input capacitance Cin

— — 5 10

10 pF

Test Circuit

Waveforms

Package Dimensions

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