SN75125

SN75121 : The SN55121 and SN75121 dual line drivers are designed for digital data transmission over lines having impedances from 50 to 500 Ω. They are also compatible with standard TTL logic and supply-voltage levels. The low-impedance emitter-follower outputs of the SN55121 and SN75121 can drive terminated lines such as coaxial cable or twisted pair. Having the outputs uncommitted allows wired-OR logic to be performed in party-line applications. Output short-circuit protection is provided by an internal clamping network that turns on when the output voltage drops below approximately 1.5 V. All of the inputs are in conventional TTL configuration and the gating can be used during power-up and power-dow.

SN75122 : SLLS075B – D1334, SEPTEMBER 1973 – REVISED FEBRUARY 1993 SN55122 J PACKAGE N8T14, SN75122 D OR N PACKAGE (TOP VIEW) 1A 1B 2R 2S 2A 2B 2Y GND 1 2 3 4 5 6 7 8 16 VCC 15 1S 14 1R 13 1Y 12 3A 11 3S 10 3R 9 3Y SN55122 FK PACKAGE (TOP VIEW) 1B 1A NC VCC 1S 2R 3 2 1 20 19 4 18 1R 2S 5 17 1Y NC 6 16 NC 2A 7 15 3A 2B 8 14 3S 9 10 11 12 13 2Y GND NC 3Y 3R The N8T14, SN55122, and SN75122 are triple line receivers that are designed for digital data transmission over lines having impedances from 50 Ω to 500 Ω. They are also compatible with standard TTL-logic and supply voltage levels. NC – No internal connection THE N8T14 AND SN75122 ARE NOT RECOMMENDED FOR NEW DESI.

SN75123 : The SN75123 is a dual line driver specifically designed to meet the input/output interface specifications for IBM System 360. It also is compatible with standard-TTL logic and supply-voltage levels. The SN75123 low-impedance emitter-follower outputs drive terminated lines such as coaxial cable or twisted pair. Having the outputs uncommitted allows wired-OR logic to be performed in party-line applications. Output short-circuit protection is provided by an internal clamping network that turns on when the output voltage drops below approximately 1.5 V. All the inputs are in conventional TTL configuration, and the gating can be used during power-up and power-down sequences to ensure that no noi.

SN75124 : The SN75124 triple line receiver is specifically designed to meet the input/output interface specifications for IBM System 360. It is also compatible with standard TTL logic and supply voltage levels. The SN75124 has receiver inputs with built-in hysteresis to provide increased noise margin for single-ended systems. An open line affects the receiver input as does a low-level input voltage, and the receiver input can withstand a level of – 0.15 V with power on or off. The other inputs are in TTL configuration. The S input must be high to enable the receiver input. Two of the line receivers have A and B inputs that, if both are high, hold the output low. The third receiver has only an A input .

SN75126 : The SN75126 quadruple line driver is designed to meet the IBM 360/370 I/O specification A22-6974-3. The output voltage is 3.11 V minimum (at IOH = – 59.3 mA) over the recommended ranges of supply voltage (4.5 V to 5.95 V) and temperature. Driver outputs use a fault-detection current-limit circuit to allow high drive current but still minimize power dissipation when the output is shorted to ground. The SN75126 is compatible with standard TTL logic and supply voltages. D OR N PACKAGE (TOP VIEW) 1Y 1F 1A 1, 2G 2A 2F 2Y GND 1 2 3 4 5 6 7 8 16 VCC 15 4Y 14 4F 13 4A 12 3,4G 11 3A 10 3F 9 3Y FUNCTION TABLE INPUTS GA LX HH HH OUTPUTS YF LH HH SL H = high level, L = low level, X = irrelevant,.

SN75127 : SN75125, SN75127 SEVENĆCHANNEL LINE RECEIVERS ą SLLS108B − D239, JANUARY 1977 − REVISED FEBRUARY 1993 SN75125 D OR N PACKAGE (TOP VIEW) 1A 2A 3A 4A 5A 6A 7A GND 1 2 3 4 5 6 7 8 16 1Y 15 VCC 14 3Y 13 4Y 12 5Y 11 6Y 10 7Y 9 2Y SN75127 D OR N PACKAGE (TOP VIEW) The SN75125 and SN75127 are monolithic seven-channel line receivers designed to satisfy the requirements of the IBM System 360/370 input/output interface specifications. Special low-power design and Schottky-clamped transistors allow for low supply-current requirements while maintaining fast switching speeds and high-current TTL outputs. The SN75125 and SN75127 are characterized for operation from 0°C to 70°C. logic sym.

SN75128 : The SN75128 and SN75129 are eight-channel line receivers designed to satisfy the requirements of the input-output interface specification for IBM 360/370. Both devices feature common strobes for each group of four devices. The SN75128 has active-high strobes; the SN75129 has active-low strobes. Special low-power design and Schottky-diode-clamped transistors allow low supply-current requirements while maintaining fast switching speeds and high-current TTL outputs. For new IBM 360/370 interface designs, see the SN751730. The SN75128 and SN75129 are characterized for operation from 0°C to 70°C. logic symbols† SN75128 1 1S 11 2S EN1 EN2 1 1S 11 2S SN75129 EN1 EN2 2 1A 3 2A 4 3A 5 4A 6 5A .

SN75129 : The SN75128 and SN75129 are eight-channel line receivers designed to satisfy the requirements of the input-output interface specification for IBM 360/370. Both devices feature common strobes for each group of four devices. The SN75128 has active-high strobes; the SN75129 has active-low strobes. Special low-power design and Schottky-diode-clamped transistors allow low supply-current requirements while maintaining fast switching speeds and high-current TTL outputs. For new IBM 360/370 interface designs, see the SN751730. The SN75128 and SN75129 are characterized for operation from 0°C to 70°C. logic symbols† SN75128 1 1S 11 2S EN1 EN2 1 1S 11 2S SN75129 EN1 EN2 2 1A 3 2A 4 3A 5 4A 6 5A .