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SN75ALS193 Test Luis A. Quintero October 7, 2009 This document contains the comparison between the SN75ALS193J, installed in the interim correlator (Taiwan 9222DF / X5 Interim Corr. Schematics, Pag1/5), and the SN75ALS193N (spare, 9CAF0LM). Both chips were fabricated by Texas Instruments. Fig. 1.a. shows the pin distribution of the SN75ALS193 ­ Quadruple Differential Line Receiver. Fig. 1.b. is the function table included in the datasheet.

(a) (b) Figure 1. SN75ALS193, (a) Connection diagram, (b) Function table - datasheet Test conditions: Vcc = 5.00V, G = GND (low level), G = GND (low level) VAB 0.2 co VAB ­ 0.2 co > ­ 0.2, < 0.2 co Open, 120 co n n n n d d d d i i i i t t t t i i i i o o o o n n n n : : : : VA = VA = VA = 120 5.00V, 2.48V, 5.00V, resisto VB VB VB r con = 2.48V (voltage divider, no load, 2 x 1k ) = 5 .0 0 V = 5 .0 0 V nected between 1A and 1B

Figure 2. SN75ALS193, Receiver 1 Table 1. Function table of the SN75ALS193, receiver 1. SN75ALS193{D, J, N} SN75ALS193J Datasheet Interim Correlator VAB (V) Output VAB (V) Output (V) 0 .2 H 0 .9 0 4 .0 7 ­ 0 .2 L ­ 0 .5 9 0 .1 1 > ­ 0 .2 , < 0 .2 ? 0 .0 0 0 .1 1 Open, 120 H 0 .0 0 7 0 .1 1 H: High level, L: Low level, ?: Indeterminate

SN75ALS193N Spare Part VAB (V) Output (V) 2 .4 0 4 .1 4 ­ 2 .3 8 0 .0 9 0 .0 0 4 .1 7 0 .0 0 1 4 .2 5

VAB (open) = 5V (0.12/600.12) 0.001V; A/B input, 300k pull-up/pull-down, resp.