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74HC191 Presettable synchronous 4-bit binary up/down counter Rev. 3 — 3 January 2017 Product data sheet 1. General description The 74HC191 is an asynchronously presettable 4-bit binary up/down counter. It contains four master/slave flip-flops with internal gating and steering logic to provide asynchronous preset and synchronous count-up and count-down operation. Asynchronous parallel load capability permits the counter to be preset to any desired value.
74HC191 NXP Semiconductors Presettable synchronous 4-bit binary up/down counter 2. Features and benefits Complies with JEDEC standard no. 7A Input levels: For 74HC191: CMOS level Synchronous reversible counting Asynchronous parallel load Count enable control for synchronous expansion Single up/down control input ESD protection: HBM JESD22-A114F exceeds 2000 V MM JESD22-A115-A exceeds 200 V Multiple package options Specified from 40 C to +85 C and 40 C to +125 C 3.
74HC191 NXP Semiconductors Presettable synchronous 4-bit binary up/down counter 5. Pinning information 5.1 Pinning +& ' 9&& 4 ' 4 &3 &( 5& 8 ' 7& 4 4 *1' +& 3/ ' ' ' 9&& 4 ' 4 &3 &( 5& 8 ' 7& 4 3/ 4 ' *1' DDD Fig 3. ' DDD Pin configuration SO16 Fig 4. Pin configuration TSSOP16 and SSOP16 5.2 Pin description Table 2.
74HC191 NXP Semiconductors Presettable synchronous 4-bit binary up/down counter 6. Functional description Function table[1] Table 3.
74HC191 NXP Semiconductors Presettable synchronous 4-bit binary up/down counter ',5(&7,21 &21752/ 8 ' 8 ' 5& 8 ' 5& (1$%/( &( &( &( &/2&. &3 &3 &3 5& DDD Fig 5. N-stage ripple counter using ripple clock ',5(&7,21 &21752/ 8 ' (1$%/( 5& 8 ' 8 ' 5& &( &( &( &3 &3 &3 &/2&. Fig 6. 5& DDD Synchronous n-stage counter using ripple carry/borrow ',5(&7,21 &21752/ (1$%/( 8 ' 8 ' 8 ' &( &( &( &3 7& &3 7& &/2&. Fig 7.
4HC191 NXP Semiconductors Presettable synchronous 4-bit binary up/down counter ' ' ' ' 3/ 8 ' &( &3 6' 4 5& 7& 4 &3 )) . 5' 4 6' 4 &3 )) . 5' 4 4 6' 4 4 &3 )) . 5' 4 6' 4 &3 )) . 5' 4 4 DDD Fig 8. Logic diagram 74HC191 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 3 — 3 January 2017 © NXP Semiconductors N.V. 2017. All rights reserved.
74HC191 NXP Semiconductors Presettable synchronous 4-bit binary up/down counter 3/ ' ' ' ' &3 8 ' &( 4 4 4 4 7& 5& ORDG FRXQW XS LQKLELW FRXQW GRZQ DDD Typical timing sequence: reset outputs to zero; preset to binary twelve; count to thirteen, fourteen, fifteen, zero, one and two; inhibit. Fig 9. Typical timing sequence 7. Limiting values Table 5. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134).
74HC191 NXP Semiconductors Presettable synchronous 4-bit binary up/down counter 8. Recommended operating conditions Table 6. Recommended operating conditions Voltages are referenced to GND (ground = 0 V) Symbol Parameter Conditions Min Typ Max Unit 2.0 5.0 6.0 V VCC supply voltage VI input voltage 0 - VCC V VO output voltage 0 - VCC V Tamb ambient temperature 40 +25 +125 C t/V input transition rise and fall rate VCC = 2.0 V - - 625 ns/V VCC = 4.5 V - 1.
74HC191 NXP Semiconductors Presettable synchronous 4-bit binary up/down counter 10. Dynamic characteristics Table 8. Dynamic characteristics Voltages are referenced to GND (ground = 0 V); CL = 50 pF unless otherwise specified; for test circuit see Figure 18. Symbol Parameter tpd 25 C Conditions 40 C to +85 C 40 C to +125 C Unit Min Typ Max Min Max Min Max - 72 220 - 275 - 330 ns VCC = 4.5 V - 26 44 - 55 - 66 ns VCC = 5.0 V; CL = 15 pF - 22 - - - - - ns VCC = 6.
74HC191 NXP Semiconductors Presettable synchronous 4-bit binary up/down counter Table 8. Dynamic characteristics …continued Voltages are referenced to GND (ground = 0 V); CL = 50 pF unless otherwise specified; for test circuit see Figure 18. Symbol Parameter tW pulse width 25 C Conditions 40 C to +85 C 40 C to +125 C Unit Min Typ Max Min Max Min Max VCC = 2.0 V 125 28 - 155 - 195 - ns VCC = 4.5 V 25 10 - 31 - 39 - ns VCC = 6.0 V 21 8 - 26 - 33 - ns VCC = 2.
74HC191 NXP Semiconductors Presettable synchronous 4-bit binary up/down counter Table 8. Dynamic characteristics …continued Voltages are referenced to GND (ground = 0 V); CL = 50 pF unless otherwise specified; for test circuit see Figure 18. Symbol Parameter 25 C Conditions Min fmax maximum frequency Min Max Min Max VCC = 2.0 V 4.0 11 - 3.2 - 2.6 - MHz VCC = 4.5 V 20 33 - 16 - 13 - MHz - 36 - - - - - MHz 24 39 - 19 - 15 - MHz - 31 - - - - - pF VCC = 6.
74HC191 NXP Semiconductors Presettable synchronous 4-bit binary up/down counter 9, &3 &( LQSXW 90 *1' W3+/ W3/+ 92+ 90 5& RXWSXW 92/ DDD Measurement points are given in Table 9. Logic levels VOL and VOH are typical output voltage levels that occur with the output load. Fig 11. The clock and count enable inputs (CP, CE) to ripple clock output (RC) propagation delays 9, 'Q LQSXW 90 *1' W3+/ W3/+ 92+ 90 4Q RXWSXW 92/ DDD Measurement points are given in Table 9.
74HC191 NXP Semiconductors Presettable synchronous 4-bit binary up/down counter 9, 8 ' LQSXW 90 *1' W3/+ W3+/ 92+ 90 7& RXWSXW 92/ W3+/ W3/+ 92+ 90 5& RXWSXW 92/ DDD Measurement points are given in Table 9. Logic levels VOL and VOH are typical output voltage levels that occur with the output load. Fig 14.
74HC191 NXP Semiconductors Presettable synchronous 4-bit binary up/down counter 9O 'Q LQSXW 90 *1' WVX WVX WK 9O 3/ LQSXW WK 90 DDD *1' The shaded areas indicate when the input is permitted to change for predictable output performance. Measurement points are given in Table 9. Fig 16.
74HC191 NXP Semiconductors Presettable synchronous 4-bit binary up/down counter 9, W: QHJDWLYH SXOVH 90 9 9, WI WU WU WI SRVLWLYH SXOVH 9 90 90 90 W: 9&& 9&& * 9, 92 5/ 57 6 RSHQ '87 &/ DDG Test data is given in Table 10. Test circuit definitions: RT = Termination resistance should be equal to output impedance Zo of the pulse generator CL = Load capacitance including jig and probe capacitance RL = Load resistance.
74HC191 NXP Semiconductors Presettable synchronous 4-bit binary up/down counter 12.
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74HC191 NXP Semiconductors Presettable synchronous 4-bit binary up/down counter 13. Abbreviations Table 11. Abbreviations Acronym Description CMOS Complementary Metal-Oxide Semiconductor DUT Device Under Test ESD ElectroStatic Discharge HBM Human Body Model MM Machine Model 14. Revision history Table 12. Revision history Document ID Release date Data sheet status Change notice Supersedes 74HC191 v.3 20170103 Product data sheet - 74HC_HCT191 v.2 Modifications: 74HC_HCT191_CNV v.
74HC191 NXP Semiconductors Presettable synchronous 4-bit binary up/down counter 15. Legal information 15.1 Data sheet status Document status[1][2] Product status[3] Definition Objective [short] data sheet Development This document contains data from the objective specification for product development. Preliminary [short] data sheet Qualification This document contains data from the preliminary specification.
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74HC191 NXP Semiconductors Presettable synchronous 4-bit binary up/down counter 17. Contents 1 2 3 4 5 5.1 5.2 6 7 8 9 10 11 12 13 14 15 15.1 15.2 15.3 15.4 16 17 General description . . . . . . . . . . . . . . . . . . . . . . 1 Features and benefits . . . . . . . . . . . . . . . . . . . . 2 Ordering information . . . . . . . . . . . . . . . . . . . . . 2 Functional diagram . . . . . . . . . . . . . . . . . . . . . . 2 Pinning information . . . . . . . . . . . . . . . . . . . . . . 3 Pinning . . . . . .