| |**************************************************************************** | [IBIS Ver] 1.0 [File name] n74f244n.ibs [File Rev] 2.0 [Date] 6/15/93 [Source] File originated at Intel Corporation, mainly as an example of a proper IBIS ASCII 1.0 file. However, data is believed to be accurate. [Notes] Pull-up VI curves and ramp times taken from silicon spice model provided by Signetecs. Pull-down VI curves taken from lab measurements using a plastic 20 pin DIP. Packaging values taken from Signetecs Spice Simulation Design Guide for Bipolar logic. The pull-up was taken from simulation and the pull-down from lab measurement in order to show that both techniques can be used effectively in IBIS ASCII file creation. [Disclaimer] This information is for modeling purposes only, and is not guaranteed. | |**************************************************************************** | [Component] N74F244N [Manufacturer] Signetics [Package] | typ min max R_pkg 50m 10m 100m | not in databook L_pkg 6.3nH 2.4nH 10.2nH C_pkg 1.35pF 0.89pF 1.81pF | |**************************************************************************** | [Pin] signal_name model_name R_pin L_pin C_pin | 1 OEa# ENABLE NA 10.2nH 1.81pF | Individual 2 Ia0 F244_INP NA 7.8nH 1.50pF | resistance 3 Yb0 F244_OUT NA 5.8nH 1.17pF | values not 4 Ia1 F244_INP NA 4.3nH 1.18pF | available 5 Yb1 F244_OUT NA 2.6nH 0.89pF | Default 6 Ia2 F244_INP NA 2.4nH 0.89pF | values used 7 Yb2 F244_OUT NA 3.3nH 1.18pF | from R_pkg 8 Ia3 F244_INP NA 4.7nH 1.17pF 9 Yb3 F244_OUT NA 6.4nH 1.50pF 10 GND GND NA 8.9nH 1.81pF 11 Ib3 F244_INP NA 8.9nH 1.81pF 12 Ya3 F244_OUT NA 6.4nH 1.50pF 13 Ib2 F244_INP NA 4.7nH 1.17pF 14 Ya2 F244_OUT NA 3.3nH 1.18pF 15 Ib1 F244_INP NA 2.4nH 0.89pF 16 Ya1 F244_OUT NA 2.6nH 0.89pF 17 Ib0 F244_INP NA 4.3nH 1.18pF 18 Ya0 F244_OUT NA 5.8nH 1.17pF 19 OEb# ENABLE NA 7.6nH 1.50pF 20 Vcc POWER NA 10.2nH 1.81pF | | The following model descriptions describe the different types | of buffers found on a 74F244 IC. These models are the 3-state | output, the input, and the enable input. POWER and GND are | reserved models and do not require a model description. | |**************************************************************************** | F244_OUT MODEL |**************************************************************************** | [Model] F244_OUT Model_type 3-State Polarity Non-Inverting Enable Active-Low | Signals Ya(0-3),Yb(0-3) | typ min max C_comp 5.0pF 2.0pF 8.0pF | |**************************************************************************** | | typ min max [Voltage range] 5.0V 4.5V 5.5V | |**************************************************************************** | [Pulldown] | Voltage I(typ) I(min) I(max) | -5.0V -16m -15.2m -16.5m -4.0V -14m -13.2m -14.5m -3.0V -12m -11.2m -12.5m -2.0V -10m -9.2m -10.5m -1.0V -8.0m -7.2m -8.5m 0.0V -5.5m -4.8m -6.0m 0.1V -5.0m -4.3m -4.5m 0.2V 0.0m -1.5m 6.5m 0.3V 25m 17m 35m 0.5V 100m 85m 110m 0.8V 215m 190m 230m 0.9V 245m 193m 270m 1.0V 260m 196m 300m 1.1V 265m 198m 320m 1.5V 276m 203m 350m 1.7V 280m 207m 357m 1.8V 282m 210m 370m 1.9V 295m 218m 385m 2.0V 310m 230m 400m 2.1V 325m 242m 417m 2.2V 340m 252m 431m 2.3V 348m 256m 440m 2.5V 356m 260m 450m 3.0V 378m 274m 465m 4.0V 431m 312m 510m 5.0V 485m 362m 560m 10.0V 755m 612m 810m | | The data in the following [Pullup] table is listed | as "VCC-Relative", as described in the Version 1.0 IBIS | ASCII Specification. As such, the voltages describe the | potential across the pullup structure (between Vcc[+] and the | output pin[-]). For example, the currents listed at a voltage | of "0.0V" describe what would be measured if the Vcc voltage | (5.0 typ, 4.5 min, and 5.5 max) were applied to the output | pin. | [Pullup] | Voltage I(typ) I(min) I(max) | -5.0V 0.0m 0.0m 0.0m 1.1V NA NA 0.0m | NA was used 1.2V NA NA -0.2m | on straight 1.3V 0.0m NA -2.2m | sections of 1.4V -0.5m NA -5.8m | the V/I curve 1.5V -2.0m 0.0m -9.8m 1.6V -5.3m -0.8m NA 1.7V NA -2.5m NA 1.8V NA -6.9m NA 2.0V -26m -16m -35m 2.5V -52m -42m -61m 3.0V -78m -67m -84m 3.5V -102m -90m -105m 4.0V -124m -114m -124m 4.5V -143m -134m -143m 5.0V -162m NA -162m 5.5V NA NA -179m 10.0V -347m -299m -384m | [GND_clamp] | Voltage I(typ) I(min) I(max) | -5.0V -784m -756m -811m -1.0V -64m -56m -71m -0.8V -29m -25m -33m -0.7V -18m -14m -22m -0.6V -8.0m -5.5m -11.5m -0.5V -1.2m -0.3m -5.0m -0.4V 0.0m 0.0m -0.5m -0.3V 0.0m 0.0m 0.0m 5.0V 0.0m 0.0m 0.0m | | no power clamp in the F244 | |**************************************************************************** | [Ramp] | typ min max dV/dt_r 1.5/2.00n 1.5/2.98n 1.5/1.61n dV/dt_f 2.0/1.21n 2.0/1.74n 2.0/0.65n | |**************************************************************************** | F244_INP MODEL |**************************************************************************** | [Model] F244_INP Model_type Input | Signals Ia(0-3),Ib(0-3) Vinl = 0.8V Vinh = 2.0V | typ min max C_comp 4.0pF 2.0pF 6.0pF | |**************************************************************************** | | typ min max [Voltage range] 5.0V 4.5V 5.5V | |**************************************************************************** | [GND_clamp] | Voltage I(typ) I(min) I(max) | -5.0V -699m -684m -718m -1.0V -59m -54m -68m -0.9V -44m -40m -52m -0.8V -30m -27m -34m -0.7V -18m -16m -23m -0.6V -9.0m -6.8m -13m -0.5V -2.8m -1.7m -6.0m -0.4V -1.1m -1.0m -2.0m -0.3V -1.0m -0.9m -1.1m 1.15V -145u -150u -138u 1.20V -145u -150u -100u 1.25V -90u -145u -37u 1.30V -48u -60u -8u 1.35V -10u -20u 0.0u 1.40V 0.0u -3u 0.0u 1.45V 0.0u 0.0u 0.0u 5.0V 0.0u 0.0u 0.0u | | no power clamp in the F244 input | |**************************************************************************** | ENABLE MODEL |**************************************************************************** | [Model] ENABLE Model_type Input | Signals OEa#,OEb# Vinl = 0.8V Vinh = 2.0V | typ min max C_comp 4.0pF 2.0pF 6.0pF | |**************************************************************************** | | typ min max [Voltage range] 5.0V 4.5V 5.5V | |**************************************************************************** | [GND_clamp] | Voltage I(typ) I(min) I(max) | -5.0V -1077m -1051m -1092m -1.0V -77m -61m -82m -0.9V -56m -43m -60m -0.8V -39m -29m -43m -0.7V -26m -17m -29m -0.6V -16m -8.0m -19m -0.5V -8.0m -1.8m -10m -0.4V -2.5m -765u -3.8m -0.3V -820u -680u -1.2m -0.2V -710u -656u -780u -0.1V -684u -637u -740u 0.0V -670u -620u -720u 1.60V -206u -223u -195u 1.65V -205u -222u -80u 1.70V -100u -221u -30u 1.75V -15u -220u -4u 1.80V -3u -200u 0.0u 1.85V 0.0u -40u 0.0u 1.90V 0.0u -4u 0.0u 1.95V 0.0u 0.0u 0.0u 5.0V 0.0u 0.0u 0.0u | | no power clamp in the enable | |**************************************************************************** | [End]