CD74HC4518

Name: CD74HC4518
Brand: TI
SKU: CD74HC4518
Price: 0.683 USD

활성

고속 CMOS 로직 듀얼 BCD 업 카운터

지금 주문

데이터 시트

document-pdfAcrobat CD74HC4518, CD54HC4520, CD74HC4520, CD74HCT4520 datasheet (Rev. D) (영어)

CD74HC4518

활성

데이터 시트

지금 주문

제품 상세 정보

Function

Counter

Bits (#)

4

Technology family

HC

Supply voltage (min) (V)

2

Supply voltage (max) (V)

6

Input type

Standard CMOS

Output type

Push-Pull

Features

Balanced outputs, High speed (tpd 10-50ns), Positive input clamp diode

Operating temperature range (°C)

-55 to 125

Rating

Catalog

Function

Counter

Bits (#)

4

Technology family

HC

Supply voltage (min) (V)

2

Supply voltage (max) (V)

6

Input type

Standard CMOS

Output type

Push-Pull

Features

Balanced outputs, High speed (tpd 10-50ns), Positive input clamp diode

Operating temperature range (°C)

-55 to 125

Rating

Catalog

Positive or Negative Edge Triggering
Synchronous Internal Carry Propagation
Fanout (Over Temperature Range)
- Standard Outputs...10 LSTTL Loads
- Bus Driver Outputs...15 LSTTL Loads
Wide Operating Temperature Range... –55°C to 125°C
Balanced Propagation Delay and Transition Times
Significant Power Reduction Compared to LSTTL Logic ICs
HC Types
- 2V to 6V Operation
- High Noise Immunity: N_IL = 30%, N_IH = 30% of V_CC at V_CC = 5V
HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility, V_IL = 0.8V (Max), V_IH = 2V (Min)
- CMOS Input Compatibility, I_l 1µA at V_OL, V_OH

Positive or Negative Edge Triggering
Synchronous Internal Carry Propagation
Fanout (Over Temperature Range)
- Standard Outputs...10 LSTTL Loads
- Bus Driver Outputs...15 LSTTL Loads
Wide Operating Temperature Range... –55°C to 125°C
Balanced Propagation Delay and Transition Times
Significant Power Reduction Compared to LSTTL Logic ICs
HC Types
- 2V to 6V Operation
- High Noise Immunity: N_IL = 30%, N_IH = 30% of V_CC at V_CC = 5V
HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility, V_IL = 0.8V (Max), V_IH = 2V (Min)
- CMOS Input Compatibility, I_l 1µA at V_OL, V_OH

The CD74HC4518 is a dual BCD up-counter. The ’HC4520 and CD74HCT4520 are dual binary up-counters. Each device consists of two independent internally synchronous 4-stage counters. The counter stages are D-type flip-flops having interchangeable CLOCK and ENABLE lines for incrementing on either the positive-going or the negative-going transition of CLOCK. The counters are cleared by high levels on the MASTER RESET lines. The counter can be cascaded in the ripple mode by connecting Q₃ to the ENABLE input of the subsequent counter while the CLOCK input of the latter is held low.

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