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HD74AC194
4-bit Bidirectional Unviersal Shift Register
Description
This bidirectional shift register is designed to incorporate virtually all of the features a system designer may want in a shift register. It features parallel inputs, parallel outputs, right shift and left shift serial inputs, operating mode control inputs, and a direct overriding clear line. The register has four destinct modes of operation: parallel (broadside) load, shift right (in the direction Q 0 toward Q3); shift left; inhibit clock (do nothing). Synchronous parallel loading is accomplished by applying the four bits of data and taking both mode control inputs, S 0 and S 1, high. The data are loaded into their respective flip-flops and appear at the output after the positive transition of the clock input. During loading, serial data flow is inhibited. Shift right is accomplished synchronously with the rising edge of the clock pulse when S0 is high and S1 is low. Serial date for this mode is entered at the shift right data input. When S 0 is low and S1 is high, data shifts left synchronously and new data is entered at the shifts left serial input. Clocking of the flip-flops is inhibited when both mode control inputs are low. The mode control inputs should be changed only when the clock input is high.
Features
* Asynchronous Master Reset * Hole (Do Nothing) Mode * Outputs Source/Sink 24 mA
HD74AC194
Pin Arrangement
MR 1 DSR 2 P0 3 P1 4 P2 5 P3 6 DSL 7 GND 8 (Top view)
16 VCC 15 Q0 14 Q1 13 Q2 12 Q3 11 CP 10 S1 9 S0
Logic Symbol
DSR P0 S0 S1 CP MR Q0
P1
P2
P3
DSL
Q1
Q2
Q3
Pin Names
S 0, S 1 P 0 to P3 DSR DSL CP MR Q0 to Q3 Mode Control Inputs Parallel Data Inputs Serial Data Input (Shift Right) Serial Data Input (Shift Left) Clock Pulse Input (Active Rising Edge) Asynchronous Master Reset Input (Active LOW) Parallel Outputs
2
HD74AC194
Logic Diagram
DSL P3 P2 P1 P0 DSR
S0
S1
D C CQ CL CL
D C CQ CL CL
D C CQ CL CL
D C CQ CL CL
CP MR
Q3
Q2
Q1
Q0
Mode Select Table
Inputs Operating Mode Reset Hold Shift Left MR L H H H Shift Right H H Parallel Load H S1 X L H H L L H S0 X L L L H H H DSR X X X X L H X DSL X X L H X X X Pn X X X X X X pn Output Q0 L q0 q1 q1 L H p0 Q1 L q1 q2 q2 q0 q0 p1 Q2 L q2 q3 q3 q1 q1 p2 Q3 L q3 L H q2 q2 p3
H : HIGH Voltage Level L : LOW Voltage Level pn (qn) : Lower case letters indicate the state of the referenced input (or output) one setup time prior to the LOW-to-HIGH clock transition X : Immaterial
3
HD74AC194
Timing Diagram
CP Mode Control Inputs S1 MR Parallel Data Inputs DSH DSL P0 Parallel Data Inputs P2 P3 Q0 Outputs Q1 Q2 Q3 Shift Right Clear Load Shift Left Inhibit Clear H L P1 H L S0
DC Characteristics (unless otherwise specified)
Item Maximum quiescent supply current Maximum quiescent supply current Symbol I CC I CC Max 80 8.0 Unit A A Condition VIN = VCC or ground, VCC = 5.5 V, Ta = Worst case VIN = VCC or ground, VCC = 5.5 V, Ta = 25C
4
HD74AC194
AC Characteristics: HD74AC194
Ta = +25C CL = 50 pF Item Maximum clock frequency Propagation delay CP to Qn Propagation delay CP to Qn Propagation delay MR to Q n Note: t PHL t PHL t PLH Symbol f max VCC (V)*1 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 Min 7.5 100 1.0 1.0 1.0 1.0 1.0 1.0 Typ -- -- -- -- -- -- -- -- 13.0 10.0 13.0 10.0 10.5 8.0 Max Ta = -40C to +85C CL = 50 pF Min 65 85 1.0 1.0 1.0 1.0 1.0 1.0 15.0 11.5 15.0 11.5 12.5 9.0 ns ns ns Max Unit MHz
1. Voltage Range 3.3 is 3.3 V 0.3 V Voltage Range 5.0 is 5.0 V 0.5 V
AC Operating Requirements: HD74AC194
Ta = +25C CL = 50 pF Item Setup time, HIGH or LOW Pn or D SR or DSL to CP Hold time, HIGH or LOW Pn or D SR or DSL to CP Setup time, HIGH or LOW Sn to CP Hold time, HIGH or LOW Sn to CP Recovery time MR to CP Pulse width tw t rec th t su th Symbol t su VCC (V)*1 Typ 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 Note: 1. Voltage Range 3.3 is 3.3 V 0.3 V Voltage Range 5.0 is 5.0 V 0.5 V -- -- -- -- -- -- -- -- -- -- -- -- Ta = -40C to +85C CL = 50 pF Guaranteed Minimum 5.5 4.0 2.0 1.5 6.0 4.5 0.0 0.0 0.5 0.5 5.5 4.5 7.0 5.0 3.0 2.0 7.5 5.5 0.0 0.0 0.5 0.5 7.0 5.0 ns ns ns ns ns Unit ns
5
HD74AC194
Capacitance
Item Input capacitance Power dissipation capacitance Symbol CIN CPD Typ 4.5 100 Unit pF pF Condition VCC = 5.5 V VCC = 5.0 V
6
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
Unit: mm
5.00 5.30 Max 16 9 4.40 1
0.08 *0.22 + 0.07 -
8 0.65 1.0 6.40 0.20 0 - 8 0.50 0.10
0.20 0.06
0.13 M 0.65 Max
*0.17 0.05 0.15 0.04
1.10 Max
0.10
0.07 +0.03 -0.04
*Dimension including the plating thickness Base material dimension
Hitachi Code JEDEC EIAJ Weight (reference value)
TTP-16DA -- -- 0.05 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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