hd74hc191rpel Renesas Electronics Corporation., hd74hc191rpel Datasheet

hd74hc191rpel

Manufacturer Part Number

hd74hc191rpel

Description

Synchronous Up/down Decade Counter

Manufacturer

Renesas Electronics Corporation.

Datasheet

1.HD74HC191RPEL.pdf (13 pages)

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HD74HC190, HD74HC191

Synchronous Up/Down Decade Counter (Single Clock Line)

Synchronous Up/Down 4-bit Binary Counter (Single Clock Line)

Description

The HD74HC190 is a 4-bit decade counter and the HD74HC191 is a 4-bit binary counter. Synchronous counting

operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincident with each

other when so instructed by the steering logic. This mode of operation eliminates the output counting spikes normally

associated with asynchronous (ripple clock) counters.

The outputs of the four flip-flops are triggered on a low-to-high-level transition of the clock input if the Enable G input

is low. A high at Enable G inhibits counting. The direction of the count is determined by the level of the Down/ Up

(D/U) input. When D/U is low, the counter counts up and when D/U is high, it counts down.

These counters feature a fully independent clock circuit. Changes at the control inputs (D/U) that will modify the

operating mode have no effect on the contents of the counter until clocking occurs. The function of the counter will be

dictated solely by the condition meeting the stable setup and hold times.

These counters are fully programmable; that is, the outputs may each be preset to either level by placing a low on the

load input and entering the desired data at the data inputs. The output will change to agree with the data inputs

independently of the level of the clock input. This feature allows the counters to be used as modulo-N dividers by

simply modifying the count length with the preset inputs.

Two outputs have been made available to perform the cascading function. Ripple clock and maximum/minimum count.

The latter output produces a high-level output pulse with a duration approximately equal to one complete cycle of the

clock while the count is zero (all outputs low) counting down or maximum (9 or 15) counting up. The ripple clock

output produces a low-level output pulse under those same conditions but only while the clock input is low. The

counters can be easily cascaded by feeding the ripple clock output to the enable input of the succeeding counter if

parallel clocking is used, or to the clock input if parallel enabling is used. The maximum/minimum count output can be

used to accomplish look-ahead for high-speed operation.

Features

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

Rev.3.00, Jan 31, 2006 page 1 of 12

HD74HC190P

HD74HC191P

HD74HC190FPEL

HD74HC191FPEL

HD74HC190RPEL

HD74HC191RPEL

High Speed Operation: t

High Output Current: Fanout of 10 LSTTL Loads

Wide Operating Voltage: V

Low Input Current: 1 A max

Low Quiescent Supply Current: I

Ordering Information

Part Name

DILP-16 pin

SOP-16 pin (JEITA)

SOP-16 pin (JEDEC)

Package Type

(Clock to Q) = 22 ns typ (C

= 2 to 6 V

(static) = 4 A max (Ta = 25 C)

PRDP0016AE-B

(DP-16FV)

PRSP0016DH-B

(FP-16DAV)

PRSP0016DG-A

(FP-16DNV)

(Previous Code)

Package Code

= 50 pF)

Abbreviation

Package

—

EL (2,000 pcs/reel)

EL (2,500 pcs/reel)

Taping Abbreviation

(Quantity)

REJ03D0587-0300

Jan 31, 2006

Rev.3.00

Related parts for hd74hc191rpel

hd74hc191rpel Summary of contents

Page 1

... Package Type HD74HC190P DILP-16 pin HD74HC191P HD74HC190FPEL SOP-16 pin (JEITA) HD74HC191FPEL HD74HC190RPEL SOP-16 pin (JEDEC) HD74HC191RPEL Note: Please consult the sales office for the above package availability. Rev.3.00, Jan 31, 2006 page pF) L (static max ( Package Code Package ...

Page 2

HD74HC190, HD74HC191 Pin Arrangement Inputs Outputs Enable G Inputs Down/Up Outputs Rev.3.00, Jan 31, 2006 page Data Ripple 4 G Clock 5 ...

Page 3

HD74HC190, HD74HC191 Timing Chart HD74HC190 Illustrated below is the following sequence: 1. Load (preset) to BCD seven. 2. Count up to eight, nine (maximum), zero, one and two. 3. Inhibit 4. Count down to one, zero (minimum), nine, eight and ...

Page 4

HD74HC190, HD74HC191 Timing Chart HD74HC191 Illustrated below is the following sequence: 1. Load (preset) to binary thirteen. 2. Count up to fourteen, fifteen (maximum), zero, one and two. 3. Inhibit 4. Count down to one, zero (minimum), fifteen, fourteen and ...

Page 5

HD74HC190, HD74HC191 Logic Diagram HD74HC190 Clock Down/Up Input A Enable G Input B Input C Input D Load HD74HC191 Clock Down/Up Input A Enable G Input B Input C Input D Load Rev.3.00, Jan 31, 2006 page ...

Page 6

HD74HC190, HD74HC191 Absolute Maximum Ratings Item Supply voltage range Input / Output voltage Input / Output diode current Output current V , GND current CC Power dissipation Storage temperature Note: The absolute maximum ratings are values, which must not individually ...

Page 7

HD74HC190, HD74HC191 Switching Characteristics Item Symbol V CC Maximum clock f 2.0 max frequency 4.5 6.0 Propagation delay 2.0 PLH PHL time 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 ...

Page 8

HD74HC190, HD74HC191 Test Circuit V Input Pulse Generator = 50 Ω Z out Note : 1. C Waveforms • Wavwform – 1 Data Load Output (Corresponding to data input) 1. Input : PRR ≤ 1 MHz Ω, ...

Page 9

HD74HC190, HD74HC191 • Waveform – 2 Load Data ( Output Q (Corresponding to data input) 1. Input pulse : PRR ≤ 1 MHz Ω, t Notes : 2. Conditions on other inputs are Vcc. • ...

Page 10

HD74HC190, HD74HC191 • Waveform – 4 Load Data ( Down / Up Clock Q 1. Input pulse : PRR ≤ 1 MHz Ω, t Notes : 2. Enable = GND • Waveform – 5 Load ...

Page 11

HD74HC190, HD74HC191 Package Dimensions JEITA Package Code RENESAS Code P-DIP16-6.3x19.2-2.54 PRDP0016AE 0. JEITA Package Code RENESAS Code P-SOP16-3.95x9.9-1.27 PRSP0016DG Index mark Rev.3.00, Jan 31, 2006 page ...

Page 12

HD74HC190, HD74HC191 JEITA Package Code RENESAS Code P-SOP16-5.5x10.06-1.27 PRSP0016DH Index mark Rev.3.00, Jan 31, 2006 page Previous Code MASS[Typ.] FP-16DAV 0.24g NOTE) ...

Page 13

Keep safety first in your circuit designs! 1. Renesas Technology Corp. puts the maximum effort into making semiconductor products better and more reliable, but there is always the possibility that trouble may occur with them. Trouble with semiconductors may lead ...

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