Product details

Function Counter Bits (#) 2 Technology Family CD4000 Supply voltage (Min) (V) 3 Supply voltage (Max) (V) 18 Input type Standard CMOS Output type Push-Pull Features Balanced outputs, Standard speed (tpd > 50ns), Positive input clamp diode
Function Counter Bits (#) 2 Technology Family CD4000 Supply voltage (Min) (V) 3 Supply voltage (Max) (V) 18 Input type Standard CMOS Output type Push-Pull Features Balanced outputs, Standard speed (tpd > 50ns), Positive input clamp diode
PDIP (N) 16 181 mm² 19.3 x 9.4
  • Very low operating dissipation . . . . . <1 mW (typ.) @ VDD = 5 V, f = 1 MHz
  • Output drivers with sink or source capability . . . . . 7 mA (typ.) @ VDD = 5 V
  • Medium speed (typ.) . . . f = 25 MHz @ VDD = 10 V
  • 100% tested for quiescent current at 20 V
  • 5-V, 10-V, and 15-V parametric ratings
  • Meets all requirements of JEDEC Tentative Standard No. 13B, "Standard Specifications for Description of 'B' Series CMOS Devices"
  • Applications
    • Digital equipment in which ultra-low dissipation and/or operation using a battery source is required.
    • Accurate timing from a crystal oscillator for timing applications such as wall clocks, table clocks, automobile clocks, and digital timing references in any circuit requiring accurately timed outputs at various intervals in the counting sequence.
    • Driving miniature synchronous motors, stepping motors, or external bipolar transistors in push-pull fashion.

  • Very low operating dissipation . . . . . <1 mW (typ.) @ VDD = 5 V, f = 1 MHz
  • Output drivers with sink or source capability . . . . . 7 mA (typ.) @ VDD = 5 V
  • Medium speed (typ.) . . . f = 25 MHz @ VDD = 10 V
  • 100% tested for quiescent current at 20 V
  • 5-V, 10-V, and 15-V parametric ratings
  • Meets all requirements of JEDEC Tentative Standard No. 13B, "Standard Specifications for Description of 'B' Series CMOS Devices"
  • Applications
    • Digital equipment in which ultra-low dissipation and/or operation using a battery source is required.
    • Accurate timing from a crystal oscillator for timing applications such as wall clocks, table clocks, automobile clocks, and digital timing references in any circuit requiring accurately timed outputs at various intervals in the counting sequence.
    • Driving miniature synchronous motors, stepping motors, or external bipolar transistors in push-pull fashion.

CD4045B is a timing circuit consisting of 21 counter stages, two output-shaping flip-flops, two inverter output drivers, and input inverters for use in a crystal oscillator. The CD4045B configuration provides 21 flip-flop counting stages, and two flip-flops for shaping the output waveform for a 3.125% duty cycle. Push-pull operation is provided by the inverter output drivers.

The first inverter is intended for use as a crystal oscillator/amplifier. However, it may be used as a normal logic inverter if desired. A crystal oscillator circuit can be made less sensitive to voltage-supply variations by the user of source resistors. In this device, the sources of the p and n transistors have been brought out to package terminals. If external resistors are not required, the sources must be shorted to their respective substrates (Sp to VDD, Sn to VSS). See Fig. 1. The first inverter in conjunction with an outboard inverter, such as 1/6 CD4069, and RX, CX, and RS can also be used to construct an RC oscillator. The following data is supplied as a guide in the selection of values for RX, RS, and CX used in Fig. 11:

  1. RX max = 10 M and CX = 50 pF
  2. CX max = 25 µF with RS = 560 k

The CD4045B types are supplied in 16-lead dual-in-line plastic packages (E suffix), 16-lead small-outline package (NSR suffix), and 16-lead thin shrink small-outline packages (PW and PWR suffixes).

CD4045B is a timing circuit consisting of 21 counter stages, two output-shaping flip-flops, two inverter output drivers, and input inverters for use in a crystal oscillator. The CD4045B configuration provides 21 flip-flop counting stages, and two flip-flops for shaping the output waveform for a 3.125% duty cycle. Push-pull operation is provided by the inverter output drivers.

The first inverter is intended for use as a crystal oscillator/amplifier. However, it may be used as a normal logic inverter if desired. A crystal oscillator circuit can be made less sensitive to voltage-supply variations by the user of source resistors. In this device, the sources of the p and n transistors have been brought out to package terminals. If external resistors are not required, the sources must be shorted to their respective substrates (Sp to VDD, Sn to VSS). See Fig. 1. The first inverter in conjunction with an outboard inverter, such as 1/6 CD4069, and RX, CX, and RS can also be used to construct an RC oscillator. The following data is supplied as a guide in the selection of values for RX, RS, and CX used in Fig. 11:

  1. RX max = 10 M and CX = 50 pF
  2. CX max = 25 µF with RS = 560 k

The CD4045B types are supplied in 16-lead dual-in-line plastic packages (E suffix), 16-lead small-outline package (NSR suffix), and 16-lead thin shrink small-outline packages (PW and PWR suffixes).

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Technical documentation

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Type Title Date
* Data sheet CD4045B TYPES datasheet (Rev. C) 27 Jun 2003
Selection guide Logic Guide (Rev. AB) 12 Jun 2017
Application note Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) 02 Dec 2015
User guide LOGIC Pocket Data Book (Rev. B) 16 Jan 2007
Application note Semiconductor Packing Material Electrostatic Discharge (ESD) Protection 08 Jul 2004
User guide Signal Switch Data Book (Rev. A) 14 Nov 2003
More literature Logic Cross-Reference (Rev. A) 07 Oct 2003
Application note Understanding Buffered and Unbuffered CD4xxxB Series Device Characteristics 03 Dec 2001

Design & development

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Evaluation board

14-24-LOGIC-EVM — Generic Logic EVM Supporting 14 through 24 Pin PW, DB, D, DW, NS, DYY, and DGV Packages

This EVM is designed to support any logic device that has a D, DW, DB, NS, PW, DYY or DGV package in a 14 to 24 pin count.

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PDIP (N) 16 View options

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