74HCT4511 데이터 시트보기 (PDF) - Philips Electronics

부품명

상세내역

일치하는 목록

74HCT4511

BCD to 7-segment latch/decoder/driver

Philips Electronics 

Philips Semiconductors

BCD to 7-segment latch/decoder/driver

Product specification

74HC/HCT4511

FEATURES

• Latch storage of BCD inputs

• Blanking input

• Lamp test input

• Driving common cathode LED displays

• Guaranteed 10 mA drive capability per output

• Output capability: non-standard

• ICC category: MSI

GENERAL DESCRIPTION

The 74HC/HCT4511 are high-speed Si-gate CMOS

devices and are pin compatible with “4511” of the “4000B”

series. They are specified in compliance with JEDEC

standard no. 7A.

The 74HC/HCT4511 are BCD to 7-segment

latch/decoder/drivers with four address inputs (D1 to D4),

an active LOW latch enable input (LE), an active LOW

ripple blanking input (BI), an active LOW lamp test input

(LT), and seven active HIGH segment outputs (Qa to Qg).

When LE is LOW, the state of the segment outputs (Qa to

Qg) is determined by the data on D1 to D4.

When LE goes HIGH, the last data present on D1 to D4 are

stored in the latches and the segment outputs remain

stable.

When LT is LOW, all the segment outputs are HIGH

independent of all other input conditions. With LT HIGH, a

LOW on BI forces all segment outputs LOW. The inputs LT

and BI do not affect the latch circuit.

APPLICATIONS

• Driving LED displays

• Driving incandescent displays

• Driving fluorescent displays

• Driving LCD displays

• Driving gas discharge displays

QUICK REFERENCE DATA

GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns

SYMBOL

tPHL/ tPLH

CI

CPD

PARAMETER

propagation delay

Dn to Qn

LE to Qn

BI to Qn

LT to Qn

input capacitance

power dissipation capacitance per latch

CONDITIONS

TYPICAL

HC

HCT

CL = 15 pF; VCC = 5 V

24

24

23

24

19

20

12

13

3.5

3.5

notes 1 and 2

64

64

Notes

1. CPD is used to determine the dynamic power dissipation (PD in µW):

PD = CPD × VCC2 × fi + ∑ (CL × VCC2 × fo) where:

fi = input frequency in MHz

fo = output frequency in MHz

∑ (CL × VCC2 × fo) = sum of outputs

CL = output load capacitance in pF

VCC = supply voltage in V

2. For HC the condition is VI = GND to VCC

For HCT the condition is VI = GND to VCC − 1.5 V

UNIT

ns

ns

ns

ns

pF

pF

December 1990

2

Share Link: