Am26S12/Am26S12A Quad Bus Transceivers DISTINCTIVE CHARACTERISTICS @ Quad high-speed bus transceivers Driver outputs can sink 100mA at 0.7V typically @ Choice of receiver hysteresis characteristics GENERAL DESCRIPTION The Am26S12/Am26S12A are high-speed quad Bus Transceivers consisting of four high-speed bus drivers with open-collector outputs capable of sinking 100mA at 0.7 volts and four high-speed bus receivers. Each driver output is brought out and also connected internally to the high- speed bus receiver. The receiver has an input hysteresis characteristic and a TTL output capable of driving ten TTL loads. An active LOW, two-input AND gate controls the four drivers so that outputs of different device drivers can be connected together for party-line operation. The enable inputs can be conveniently driven by active LOW decoders such as the Am54S/74S139. The high-drive capability in the LOW state allows party-line operation with a line impedance as low as 10082. The line can be terminated at both ends, and still give considerable noise margin at the receiver. The hysteresis characteristic of the Am26S12 receiver is chosen so that the receiver output switches to a HIGH logic level when the receiver input is at a HIGH logic level and moves to 1.4 volts typically, and switches to a LOW logic level when the receiver input is at a LOW logic level and moves to 2.0 volts typically. This hysteresis characteristic makes the receiver very insensitive to noise on the bus. The Am26$12A is functionally identical to the Am26S12 but has a different hysteresis characteristic so that the output switches with the input being typically at 1.2 voits or 2.25 volts. In both devices the threshold margin, the difference between the switching points, is greater than 0.4 volts. BLOCK DIAGRAM zB E Ig " 12 13 8g Ba B3 Zo 2 22 Z4 BD001800 RELATED PRODUCTS Part No. Description 26810 Quad Bus Transceiver 26811 Quad Bus Transceiver 2915A Quad Three-State Bus Transceiver with Interface Logic 2916A Quad Three-State Bus Transceiver with interface Logic 2917A Quad Three-State Bus Transceiver with Interface Logic 05395A/05396A 40-15 Refer to Page 13-1 for Essential information on Military Devices velsocwiy /zisgzwy Am26S12/Am26S12A CONNECTION DIAGRAM Top View By lo 29 Bot 2, +E GND D004070 Note: Pin 1 is marked for orientation LOGIC SYMBOL METALLIZATION AND PAD LAYOUT i 2 | an | , a 1 to 12 13 3 : af | 5 Am26512 Am26S12A 2 Ts 2 : 4 - 10 2, iK 10 QUAD Zz TRANSCEIVER 2 . 23-13 t 789 GND E 8 8) 82 83 Y 1 Y 1 DIE SIZE: 0.071" x 0.072" t 4 12 15 Lsooos6o Veg = Pin 16 GND = Pin 8 ORDERING INFORMATION AMD products are available in several packages and operating ranges. The order number is formed by a combination of the following: Device number, speed option (if applicable), package type, operating range and screening option (if desired). Am26S12/12A D c B Valid Combinations L_ Screening Option PC Blank Standard processing Am26S12 DC, DM B Burn-in Am26S12A FM Temperature (See Operating Range) XC, XM C -Commercial (0C to +70C) M -Military (-55C to + 125C) Package D- 16-pin CERDIP F-16-pin flatpak P- 16-pin plastic DIP X- Dice Valid Combinations Consult the AMD sales office in your area to Device type determine if a device is currently available in the Quad Bus Transceivers combination you wish. 05395A/05396A 10-16 Refer to Page 13-1 for Essential Information on Military Devices Am26S12/26S12A APPLICATION aDORESS STROBE ~~] | | E Ao ay 1.2 Am54$174S 139 GND GNO INPUTS ENPUTS, INPUTS INPUTS to 1 '2 93 tg ty bg 13 ty 1 Ig Is Wy ty 2 bg Zo - 29 2g 70o- 21 RECEIVER 2) RECEIVER 71 RECEWVER ar Am26S12/26512A 7 OUTPUTS, Am26S12126S12A 7 OUTPUTS. AmPOS12/265120 7, OUTPLTS Am?6512/265124 7, 23/- aah 24/- Lik SV Bo dy 82 83 4p By By AG dp By By By Ho 4) Be By 7 oS Oo 9 ge oO 100% AN 10DR A WA 1008 WOR We 100 Nhe 100M PARTY LINE OPERATION RECEIVER OUTPUTS AFO01030 10-17 05395A/05396A Reter to Page 13-1 for Essential intormation on Military Devices velsgeuly/zisocwy Am26S12/Am26S12A ABSOLUTE MAXIMUM RATINGS OPERATING RANGES Storage Temperature ..............:serreee -65C to + 150C Commercial (C) Devices Temperature (Ambient) Under Bias ....... -55C to + 125C Temperature .....0....... 0. cise cee ee eee eee renee 0C to +70C Supply Voltage to Ground Potential Supply Voltage ............c cece cence +4,75V to +5.25V (Pin 16 to Pin 8) Continuous............... -~0.5V to +7.0V a . DC Voltage Applied to Outputs For winery M) pevices 55C to +125C High Output State... 0c cee -0.5V to +Voc max S POPATUPE sees eeeeeseeresseserseee reer: - o DG Input Voltage ...cscccccssescesecseesseneees -0.5V to +5.5 UPPly VONAGE... eevnsrieessrees rss +4.5V to +5.5V DC Output Current, Into (Bus) 200mA Operating ranges define those limits over which the function- DC Output Current. Into Outputs eee ality of the device is guaranteed. (Receiver)........... DC Input Current Stresses above those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent device failure. Functionality at or above these |imits is not implied. Exposure to absolute maximum ratings for extended periods may affect device reliability. DC CHARACTERISTICS over operating range unless otherwise specified Parameters Description Test Conditions Min woe 1) Max Units loc Power Supply Current Voc = MAX 46 70 mA Voc = MAX or OV; 'Bus Bus Leakage Current Vaus = 4.0V; Driver in OFF State 100 HA Driver Characteristics COM'L lot = 100mA 0.7 08 Volts tote Output LOW Voltage voc en V lo. = 60mA 0.55 07 lo = IN 1H IL] MIL lo, = 100mA 0.7 0.85 Volts Vin Input HIGH Voltage 2.0 Volts VIL Input LOW Voltage 0.8 Volts VI Input Clamp Voltage Voc = MIN, lin =-18mA -1.2 Volts Input Current = = \ at Maximum Input Voltage Voc = MAX, Vi = 5.5V 1.0 mA Unit Load = = he Input HIGH Current Voc = MAX, Vi = 2.4V 1.0 40 yA Unit Load = = Me Input LOW Current Vcc = MAX, Vi = 0.4V -0.4 -1.6 mA Receiver Characteristics Voc = MIN, ion = - 800pA VOH Output HIGH Voltage Vin = Vi, (Receiver) 24 Volts Voc = MIN, lo, = 20mA Vou Output LOW Voltage Vin = Vi__ (Receiver) 0.4 0.5 Volts Am26S12 1.8 2.0 2.2 VIH Input HIGH Level Threshold E=H Am26s12A 2.05 2.25 2.45 Volts _ Am26S12 1.2) 14 16 VIL Input LOW Level Threshold E=H Am26S12A 40) 12 14 Volts Vom Input Threshold Margin E=H 04 Volts los. Output Short Circuit Current Yoo = MAX, Vout = 0.0V -20 -55 mA Notes: 1. Typical limits are at Voc = 5.0V, 25C ambient and maximum loading. 2. For the Am26S12FM, Am26S12AFM the output current must be limited at 6GmA or the maximum case temperature limited to 125C _ for correct operation. 3. Hysteresis characteristics data tested at 25C only. SWITCHING CHARACTERISTICS (Ta = + 25C, Vcc = 5.0V) Parameters Description Conditions Min | Typ | Max | Units tPLH Turn Off Delay Input to Bus Cip = 18pF, Rig = 100 2 7 WW ns tPHL Turn On Delay Input to Bus Crp = 300 pF, Rig = 502 14 21 ns tPLH Turn Off Delay Enable to Bus Cip = 15pF, Rig = 502 10 15 ns tPHL Turn On Delay Enabie to Bus Crp =15pF, Rig = 502 10 15 ns tPLH Turn Off Delay Bus to Output Cy = 15 pF 18 26 ns tPHL Turn On Delay Bus to Output C, = 15 pF 18 26 ns 05395A/05396A 10-18 Refer to Page 13-1 for Essential information on Military Devices