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HD74HC190/HD74HC191
Synchronous Up/Down Decade Counter (Single Clock Line) Synchronous Up/Donw 4-bit Binary Counter (Single Clock Line)
Description
The HD74HC190 and HD74HC191 are synchronous, reverside up/down counters. 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 qual 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 paralle enabling is used. The maximum/minimum count output can be used to accomplish look-ahead for high-speed operation.
HD74HC190/HD74HC191
Features
* * * * * High Speed Operation: tpd (Clock to Q) = 22 ns typ (CL = 50 pF) High Output Current: Fanout of 10 LSTTL Loads Wide Operating Voltage: VCC = 2 to 6 V Low Input Current: 1 A max Low Quiescent Supply Current: ICC (static) = 4 A max (Ta = 25C)
Pin Arrangement
Inputs
Data B 1 QB 2 QB QA G B A CK
Ripple Clock
16 VCC 15 Data A Inputs 14 Clock 13 Ripple Clock 12 Max/Min 11 Load 10 Data C 9 Data D (Top view) Inputs
Outputs
QA 3 Enable G 4
Inputs Down/Up 5 QC 6 Outputs QD 7 GND 8 QD D C
Dn/Up Max/Min
Outputs
QC
Load
2
HD74HC190/HD74HC191
Timing Chart
HD74HC190 Illustrated below is the following sequence: 1. 2. 3. 4. Load (preset) to BCD seven. Count up to eight, nine (maximum), zero, one and two. Inhibit Count down to one, zero (minimum), nine, eight and seven.
Load A B C D Clock Down/Up Enable G QA QB QC QD Max/Min Ripple Clock 7 8 9 0 12
Inhibit
221
0
9
8
7
Count Up
Count Down
Load
3
HD74HC190/HD74HC191
HD74HC191 Illustrated below is the following sequence: 1. 2. 3. 4. Load (preset) to binary thirteen. Count up to fourteen, fifteen (maximum), zero, one and two. Inhibit Count down to one, zero (minimum), fifteen, fourteen and thirteen.
Load A Data Inputs B C D Clock Down/Up Enable G QA QB QC QD Max/Min Ripple Clock 13 14 15 0 1 2
Inhibit
2
1
0
15
14 13
Count Up
Count Down
Load
4
HD74HC190/HD74HC191
Logic Diagram
HD74HC190
Clock Ripple Clock Down/Up Input A Enable G Input B
CK P CK B INCL Q Q CK P CK A INCL Q Q
Max/Min Output QA
QB
Input C
CK P CK C INCL Q Q
QC
Input D
CK P CK D INCL Q Q
QD
Load
5
HD74HC190/HD74HC191
HD74HC191
Clock Ripple Clock Max/Min Output
CK P CK A INCL Q Q
Down/Up Input A
QA
Enable G Input B
CK P CK B INCL
Q Q
QB
Input C
CK P CK C INCL Q Q
QC
Input D
CK P CK D INCL Q Q
QD
Load
6
HD74HC190/HD74HC191
DC Characteristics
Ta = 25C Item Input voltage Symbol VIH Ta = -40 to +85C Max -- -- -- 0.5 1.35 1.8 -- -- -- -- -- 0.1 0.1 0.1 0.33 0.33 1.0 40 A A I OL = 4 mA I OL = 5.2 mA Vin = VCC or GND Vin = VCC or GND, Iout = 0 A V I OH = -4 mA I OH = -5.2 mA Vin = VIH or VIL I OL = 20 A V Vin = VIH or VIL I OH = -20 A V Unit V Test Conditions
VCC (V) Min Typ Max Min 2.0 4.5 6.0 1.5 -- 3.15 -- 4.2 -- -- -- -- -- -- -- -- -- -- 0.5 1.5 3.15 4.2 --
VIL
2.0 4.5 6.0
1.35 -- 1.8 -- 1.9 4.4 5.9 4.13 5.63 -- -- --
Output voltage
VOH
2.0 4.5 6.0 4.5 6.0
1.9 2.0 -- 4.4 4.5 -- 5.9 6.0 -- 4.18 -- 5.68 -- -- -- -- -- -- -- -- -- --
VOL
2.0 4.5 6.0 4.5 6.0
0.0 0.1 0.0 0.1 0.0 0.1 -- -- -- --
0.26 -- 0.26 -- 0.1 -- 4.0 --
Input current Quiescent supply current
Iin I CC
6.0 6.0
7
HD74HC190/HD74HC191
AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns)
Ta = 25C Item Maximum clock frequency Symbol f max Ta = -40 to +85C Max 4 20 24 335 66 56 290 58 49 150 30 26 240 48 41 315 63 54 290 58 49 165 33 28 240 48 41 -- -- -- -- -- -- ns ns Down/up to max/min G to RC Down/up to RC Clock to max/min Clock to Q Clock to RC Data to Q ns Load to Q Unit MHz Test Conditions
VCC (V) Min Typ Max Min 2.0 4.5 6.0 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 80 16 14 0 0 0 -- -- -- -- 21 -- -- 18 -- -- 14 -- -- 22 -- -- 26 -- -- 20 -- -- 14 -- -- 17 -- -- 8 - -- -6 -- 5 25 29 -- -- --
Propagation delay t PLH time t PHL
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 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0
265 -- 53 45 -- --
230 -- 46 39 -- --
120 -- 24 20 -- --
190 -- 38 32 -- --
250 -- 50 43 -- --
230 -- 46 39 -- --
130 -- 26 22 -- --
190 -- 38 32 -- -- -- -- -- -- -- -- 100 20 17 0 0 0
Pulse width
tw
2.0 4.5 6.0
Hold time
th
2.0 4.5 6.0
8
HD74HC190/HD74HC191
AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns) (cont)
Ta = 25C Item Setup time Symbol t su Ta = -40 to +85C Max -- -- -- 95 19 16 10 pF ns Unit ns Test Conditions
VCC (V) Min Typ Max Min 2.0 4.5 6.0 100 -- 20 17 -- -- -- -- 7 -- -- 5 -- 5 -- -- -- 75 15 13 10 125 25 21 -- -- -- --
Output rise/fall time
t TLH t THL
2.0 4.5 6.0
Input capacitance
Cin
--
9
19.20 20.00 Max 16 9 7.40 Max 6.30
Unit: mm
1 1.3
1.11 Max
8
0.51 Min
2.54 Min 5.06 Max
7.62
2.54 0.25
0.48 0.10
0.25 - 0.05 0 - 15
Hitachi Code JEDEC EIAJ Weight (reference value)
+ 0.13
DP-16 Conforms Conforms 1.07 g
Unit: mm
10.06 10.5 Max 16 9
5.5
1
*0.22 0.05 0.20 0.04
8 0.80 Max
2.20 Max
0.20 7.80 + 0.30 -
1.15 0 - 8 0.70 0.20
1.27 *0.42 0.08 0.40 0.06
0.12 M
Hitachi Code JEDEC EIAJ Weight (reference value) FP-16DA -- Conforms 0.24 g
*Dimension including the plating thickness Base material dimension
0.10 0.10
0.15
Unit: mm
9.9 10.3 Max 16 9 3.95 1 1.27 0.635 Max 8
0.11 0.14 + 0.04 - 1.75 Max
*0.22 0.03 0.20 0.03
0.10 6.10 + 0.30 -
1.08 0 - 8
0.67 0.60 + 0.20 -
*0.42 0.08 0.40 0.06
0.15 0.25 M
*Dimension including the plating thickness Base material dimension
Hitachi Code JEDEC EIAJ Weight (reference value)
FP-16DN Conforms Conforms 0.15 g
Cautions
1. Hitachi neither warrants nor grants licenses of any rights of Hitachi's or any third party's patent, copyright, trademark, or other intellectual property rights for information contained in this document. Hitachi bears no responsibility for problems that may arise with third party's rights, including intellectual property rights, in connection with use of the information contained in this document. 2. Products and product specifications may be subject to change without notice. Confirm that you have received the latest product standards or specifications before final design, purchase or use. 3. Hitachi makes every attempt to ensure that its products are of high quality and reliability. However, contact Hitachi's sales office before using the product in an application that demands especially high quality and reliability or where its failure or malfunction may directly threaten human life or cause risk of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation, traffic, safety equipment or medical equipment for life support. 4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly for maximum rating, operating supply voltage range, heat radiation characteristics, installation conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable failure rates or failure modes in semiconductor devices and employ systemic measures such as failsafes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other consequential damage due to operation of the Hitachi product. 5. This product is not designed to be radiation resistant. 6. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without written approval from Hitachi. 7. Contact Hitachi's sales office for any questions regarding this document or Hitachi semiconductor products.
Hitachi, Ltd.
Semiconductor & Integrated Circuits. Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan Tel: Tokyo (03) 3270-2111 Fax: (03) 3270-5109
URL
NorthAmerica : http:semiconductor.hitachi.com/ Europe : http://www.hitachi-eu.com/hel/ecg Asia (Singapore) : http://www.has.hitachi.com.sg/grp3/sicd/index.htm Asia (Taiwan) : http://www.hitachi.com.tw/E/Product/SICD_Frame.htm Asia (HongKong) : http://www.hitachi.com.hk/eng/bo/grp3/index.htm Japan : http://www.hitachi.co.jp/Sicd/indx.htm For further information write to:
Hitachi Semiconductor (America) Inc. 179 East Tasman Drive, San Jose,CA 95134 Tel: <1> (408) 433-1990 Fax: <1>(408) 433-0223 Hitachi Europe GmbH Electronic components Group Dornacher Strae 3 D-85622 Feldkirchen, Munich Germany Tel: <49> (89) 9 9180-0 Fax: <49> (89) 9 29 30 00 Hitachi Europe Ltd. Electronic Components Group. Whitebrook Park Lower Cookham Road Maidenhead Berkshire SL6 8YA, United Kingdom Tel: <44> (1628) 585000 Fax: <44> (1628) 778322 Hitachi Asia Pte. Ltd. 16 Collyer Quay #20-00 Hitachi Tower Singapore 049318 Tel: 535-2100 Fax: 535-1533 Hitachi Asia Ltd. Taipei Branch Office 3F, Hung Kuo Building. No.167, Tun-Hwa North Road, Taipei (105) Tel: <886> (2) 2718-3666 Fax: <886> (2) 2718-8180 Hitachi Asia (Hong Kong) Ltd. Group III (Electronic Components) 7/F., North Tower, World Finance Centre, Harbour City, Canton Road, Tsim Sha Tsui, Kowloon, Hong Kong Tel: <852> (2) 735 9218 Fax: <852> (2) 730 0281 Telex: 40815 HITEC HX
Copyright ' Hitachi, Ltd., 1999. All rights reserved. Printed in Japan.

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