PDF HEF4526B Data sheet ( Hoja de datos )

Número de pieza	HEF4526B
Descripción	Programmable 4-bit binary down counter
Fabricantes	NXP Semiconductors
Logotipo
Hay una vista previa y un enlace de descarga de HEF4526B (archivo pdf) en la parte inferior de esta página. Total 19 Páginas
No Preview Available ! HEF4526B Programmable 4-bit binary down counter Rev. 5 — 22 November 2011 Product data sheet 1. General description The HEF4526B is a synchronous programmable 4-bit binary down counter with active HIGH and active LOW clock inputs (CP0, CP1), an asynchronous parallel load input (PL), four parallel inputs (A0 to A3), a cascade feedback input (CF), four buffered parallel outputs (Q0 to Q3), a terminal count output (TC), an overriding asynchronous master reset input (MR) and a decoded TC output that can be used for divide-by-n applications. In single stage applications the TC output is connected to PL. CF allows cascade divide-by-n operation with no additional gates required. Information on A0 to A3 is loaded into the counter while PL is HIGH, independent of all other inputs except MR, which must be LOW. When PL and CP1 are LOW, the counter advances on a LOW-to-HIGH transition of CP0. When PL is LOW and CP0 is HIGH, the counter advances on a HIGH to LOW transition of CP1. TC is HIGH when the counter is in the zero state (Q0 = Q1 = Q2 = Q3 = LOW) and CF is HIGH and PL is LOW. A HIGH on MR resets the counter (Q0 to Q3 = LOW) independent of other inputs. The clock input is highly tolerant of slower clock rise and fall times due to Schmitt trigger action. It operates over a recommended VDD power supply range of 3 V to 15 V referenced to VSS (usually ground). Unused inputs must be connected to VDD, VSS, or another input. 2. Features and benefits  Fully static operation  5 V, 10 V, and 15 V parametric ratings  Standardized symmetrical output characteristics  Specified from 40 C to +85 C  Complies with JEDEC standard JESD 13-B 3. Ordering information Table 1. Ordering information All types operate from 40 C to +85 C. Type number Package Name Description HEF4526BP DIP16 plastic dual in-line package; 16 leads (300 mil) HEF4526BT SO16 plastic small outline package; 16 leads; body width 3.9 mm Version SOT38-4 SOT109-1 1 page NXP Semiconductors HEF4526B Programmable 4-bit binary down counter 6. Functional description Table 3. Function table[1] MR PL CP0 CP1 Mode H X X X reset (asynchronous) L H X X preset (asynchronous) L L  H no change L L L  no change L L  X no change L L X  no change L L  L counter advances L L H  counter advances [1] H = HIGH voltage level; L = LOW voltage level; X = don’t care;  = positive-going transition;  = negative-going transition. Table 4. Counting mode CF = HIGH; PL = LOW; MR = LOW. Count Outputs Q3 Q2 Q1 Q0 15 H H H H 14 H H H L 13 H H L H 12 H H L L 11 H L HH 10 H L HL 9 HL L H 8 HL L L 7 L HHH 6 L HHL 5 L HL H 4 L HL L 3 L L HH 2 L L HL 1LLLH 0LLLL HEF4526B Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 5 — 22 November 2011 © NXP B.V. 2011. All rights reserved. 5 of 19 5 Page NXP Semiconductors 11. Waveforms HEF4526B Programmable 4-bit binary down counter Vl CP0 input 0V Vl CP1 input 0V VOH Qn output VOL VOH TC output VOL 1/fmax VM tW VM tPLH VM tPLH VM tW tPHL tPHL tPLH 001aae724 a. Propagation delays for CP0, CP1 to Qn, and TC, minimum CP0 and CP1 pulse widths and maximum frequency Vl PL input VM 0V tsu tW th Vl An input VM 0V VOH Qn output VOL tPLH 90% 10% tt tPHL tt 001aae723 b. Propagation delays for PL and An to Qn, setup and hold times for PL to An, Qn transition times and minimum PL pulse width Fig 6. Measurement points are given in Table 11. The logic levels VOH and VOL are typical output voltage levels that occur with the output load. Waveforms showing switching times HEF4526B Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 5 — 22 November 2011 © NXP B.V. 2011. All rights reserved. 11 of 19 11 Page

Páginas	Total 19 Páginas
PDF Descargar	[ Datasheet HEF4526B.PDF ]

Hoja de datos destacado

Número de pieza	Descripción	Fabricantes
HEF4526B	Programmable 4-bit binary down counter	NXP Semiconductors
HEF4526B	Programmable 4-bit binary down counter	Philips

Número de pieza	Descripción	Fabricantes
SLA6805M	High Voltage 3 phase Motor Driver IC.	Sanken
SDC1742	12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters.	Analog Devices

DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares,
permitiéndote verlos en linea o descargarlos en PDF.

DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar