74LS189 FAIRCHILD | Alldatasheet
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\\as/asie9 Onl T dS 4LS/74LS189 5 // 75 ed Lae. 64-BIT RANDOM ACCESS MEMORY ai] [75] a: (With 3-State Outputs) we Gl [7a] a2 o G) [13] As 3G) [72] D1 [6] [17] O« o] [10] Ds DESCRIPTION — The '189 is a high speed 64-bit RAM organized as a 16- | NPL pelos word by 4-bit array. Address inputs are buffered to minimize loading and are fully decoded on-chip. The outputs are 3-state and are in the high impedance ‘state whenever the Chip Select (CS) input is HIGH. The outputs are active ‘only in the Read mode and the output data is the complement of the stored dati ne ae LOGIC SYMBOL © 3-STATE OUTPUTS FOR DATA BUS APPLICATIONS © BUFFERED INPUTS MINIMIZE LOADING — a4 6 10 12 3 © ADDRESS DECODING ON-CHIP t © DIODE CLAMPED INPUTS MINIMIZE RINGING SD; D> Ds Ds WE 1 yao s—a; ORDERING CODE: See Section 9 ua COMMERCIAL GRADE| MILITARY GRADE 13—as pxas | ow fv 5.0 V #5%, Voo=#80Vit0%, | nw eee loo = + 5%, co = +5. + » 5 OOO OUT | ta=orcto+70°C | Ta=-85°C to +125° | TYPE s7 an Plastic OIP (Ph | + pstesee 7ALsTBePC | fe | Vec = Pin 16 Ceramic | & frssiesoe, 74LS189DC |54S189DM, 54LS189DM | | GND = Pin’ Fiatpak 74S189FC, 74LS189FC |54S189FM, 54LS189FM INPUT LOADING/FAN-OUT: See Section 3 for U.L. definitions 54/748 (U.L.) S4/74LS (ULL.) PIN NAMES DESCRIPTION NIGH/LOW. NiGH/Low Ao— As Address Inputs 0.63/0.16 0.5/0.013 cs Chip Select Input (Active LOW) 0.63/0.16 0.5/0.013 WE Write Enable Input (Active LOW) 0.63/0.16 0.5/0.013 D1—Ds Data Inputs 0.63/0.16 0.5/0.013 O1— Fa Inverted Data Outputs 162/10 10/10 (50) (5.0) 4-277
OPERATION | CONDITION OF OUTPUTS CS WE ucyu | write High Impedance t|H | Read Complement of Stored Data| H |x | inhibit High Impedance H= HIGH Voltage Level U= Low Vottage Level X= Immaterial LOGIC DIAGRAM a 0 we Chas . |_| A 16-WORD x 4-81T DECODER ApoREsS MEMORY CELL . DRIVERS DECODER wony C . || As CJ : OO 3 Oy DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified) my =e
04 OL = 16 mA (S189)
Vou Output LOW Voltage xc 0S v NEON eae) lou = 16 mA (74L8189) an | Vec = Min XM 28 lon = 2.0 mA (545169) Vou Output HIGH Voltage XC 8 v oe es ma crasies) lon = 0.4 mA (LS189) los Output Short Circuit Current | -a0 -100] -80- | ma | Voc = Max Ice Power Supply Current [of ao [ma ‘| Voc = Max; WE, OS, Gnd “Typical Value 4-278
AC CHARACTERISTICS OVER RECOMMENDED Vcc AND Ta RANGE (unless otherwise specified) SYMBOL CL = 30 pF [C.=15 pF] UNITS CONDITIONS Ru = 300.0 tun Access Time, HIGH or [_xM_| 37° Figs. 3-1, 3-20 tPHL LOW, An to On 37" igs. 3-1, tezH ‘Access Time, HIGH or Figs. 3-3, 3-11, 9-12 teze LOW, CS to On Ri = 2 kf (LS189) tpuz Disable Time 25 Figs. 3-3, 3-11, 3-12 SS to Sn 25 Ru =2 kf (L189) t Disable Time 25 Gas Pez ES to On 7 = 5 PF tezH Access Time, HIGH or |_XM_| Figs. 3-3, 3-11, 3-12 pa tzu. LOw, WE to On Ri = 2 kf (LS189) , Disable Time [xm] 32 BEEZ KO TLS180) Pie WE to On 20 Leo P AC OPERATING REQUIREMENTS OVER RECOMMENDED Vcc AND Ta RANGE (unless otherwise specified) ommeot | ramneren ere bar [owns | conprmions fe AntoWe Ow Po ee | ts (L) An to WE Fig. 3-21 th (H) Hold Time HIGH or LOW th (Ld An to WE pty onteWe OM Ip | & [ = | tL) Dp to WE 25) Fig. 3-13 ty (H) Hold Time HIGH or LOW trib On to WE Setup Time LOW - ha Ea I Fa S14 Hold Time LOW " ne Ea I Fig 18 tw) WE Pulse Width LOW [20 | ae [ons ‘| Fig 3-14 “Typical Value 4-279