206 54177 /T41TT Asynchronous 35-MHz 4-Bit Binary Counar/Lacth | __ Schottky TTL High-Speed TTL Low-Power Schottky TTL Standard TTL Low-Power TTL Package Package Package |. Gece coo . | . age Package Package Device Type |- a Device T +- D T To Tiaicel i i e Tp ype r evice Type | Device Type |-+-_--4 Device Type | - Ci P|MICF C|P|MICF C}P|MICF C}P)MICF p C|P | MCF T. l. _ 4 _] . | __] SN54177 | wil _ | { SN74177 Den ae FAIRCHILD [- 44 PP FMsalTT FE MoSIT7/OU" | \ F C74177/F. 93177 [D:1) PL ~] MOTOROLA }---}} _ po a | MC 74177 Pi N.S.C. { psa TT C PT OM74177 Nl r r PHILPS | ttf. ty ip yp. Lt pt N74177 1 SIGNETICS i. _. [yo N74177 me SIEMENS | 1 ot | FUJITSU |] HITACHI |__| tL +14 HD74177 PO MITSUBISHI |. M74177 Pb} TOSHIBA a - Electrical Characteristics SNS4177/SN74177 . . . i Pin Assignments (Top View) Function Table absolute maximum ratings over operating free-air tempeature range BATA INPUTS ~ 177 (See Now A) Yoo SLeAR 0p ET Op Supply voltage. Vou W Operating free-ar [SNS@ [ 55T to 125 7) 2 Ga Input voltage 5.5V | temperature range | SN7 Ot to 700 QD 144423 Ef 2 pti | mo ey? L Interemitter voltage (See Nore |) 3.6v Storage temperature range 65U to 150 1 I 4 L recommended operating conditions CLEAR 0 BOs 4 L SN54177 SN74177 :COUNT/ otocx 4 UNIT Load MIN NOM MAX |MIN NOM MAX exape 4 L Supply voltage, Voc 455 5.5)4.75 5 5.25} Vv a 6 8 , High-level output ourrent, low 800 800 | uA + 4 Low-tevel output ourrent, IoL i6 16 | mA _t I I tL L Count frequene Clock} input 0 35 0 as | MHz 1 2 3 4 5 6 7 4 aveney Giock-2 wnput_| 0 7.5[ 0 175 COUNT! Gg ELA, a, OLDOF nb 5 Clocik-1 input 1a 1a Loao DATA INPUTS z b Giock-2 input | 28 28 a eaynchronous input Low input To cleat 9018 Og 4 Pi th, tulse width, tw Clear 20 20 ns OB. O. 74 Op tow Hetugh level, Low lavet Load 25 25 . . Input hold ume, Hignievet cata | tw(tosd) 'w (toad) Functional Block Diagam n npu me. thot Low-level data | tyiload) Tw{Joad) . Input setup t t High-level data | 1S 15 ns Input setup time: tsatup Low-level data | 20 20 pe Count enable Uma. tonapie (see Note 2) 25 25 ns an Shay Operating free-ar temperature, Ta 55 125 Q mi t electrical characteristics over recommended operating free-air temperature range PARAMETER * TEST CONDITIONS MIN TYP$ MAX | UNIT Vig __High-level_input_voltage 2 v Vii _Cow-level input _voltage aa] vy vi Input clamp voltage Voo=MIN, \W=12mA -1.6] V v High-level t volt Voo=MIN, Vin=2V. 2.4 3.4 v csoen OH og) vel ouipul voltage Vi =0.8y, Ig = 800.8 . . Voc=MIN. Vin=2V. 7 . al ov Vor Low-level output voltage Vy, =9.8v. 1A G2 0 2 Ke 1 nour current at Voo=MAX, V|=5.5V ty mA -t Maximum input voltage PREST 1 , Qata, count/load 40 O % i) ; out current -aieatscloek | Voc=MAX, Vy=2.4V ei] 2A Leb + neu Cloak 2 8 Osta, count/load 16 cope Low-level | input Cleat Vog=MAX, Vj=0.4 H3-21 na Giren |S! =a. mata 8 Clock 2 =3.2 4 suse [ 20 5 PRES on 5 = | ope los Short-cirouit output ourrent | Vgg=MAX SNIa oe =] ; 0 icc Supply ourrent Voc=MAX, See Note 3 30 4a | ma tmax [from Clook | to output Qa 35 so MHz cuean q 3 APLH] from Clock | to output OA $ ons tPHL ul 7 APL! am Glock 2 a | u 7 77 GbMi: PRESETTABLE DECARE AND BINARY COUNTER LATCH irom to output Op | = ns PHL 4 voc me 2 NOTES: [,This is the voltage betweeh two emitters of a muitiple-emitter transistor. For this q = . oe trom Clook 2 to output Oy ce iset rv ar ns. circuit, this rating applies between the clear and count/load inputs. te 4 R =4009. 4 2.Count enable time is the interval immediately preceding the negative-going edge of the APLH| trom Clock 2 to output | t < 881 ns i i TPHL 'D | 30 5 clock pulse during which interval the CoOUNnt/tosd and clear inputs must both de phy] from A, B.C, D 19 2a high to ansure counting. tpi_ | to out O4. QB. OC. OD u | 3.loc is measured with al! inputs grounded and all outputs open. SELH! trom Load to Any outpu: 29 431 os A.Output QO, connected to clock-2 input. tPHL 32 a tpHL]| from Clear to Any output 32 45 | ns #Q,. outputs are tested at [o, =!6 mA plus the limit value of IL for the ctock-2 input. This permits driving the clock-2 input while fanning out to (0 Series 54/74 loads TF or conditions showns a MIN or MAX, use the appropriate value sp! under r operating for the devics type. * tmaxZ Maximum tagut count frequency ZAI typical values are at VCC =5V. Ta=25e. @Not more than one output should be snored at a time. tp. 4 Spropagation delay time, low-to-high-level output TPH = propagation delay time, high to-low-level output