4619 chips,what to look for?

[Pyotr]

Hey all,
With the new N2 REV 106/7 script out and only working with loaders that are equipped with the 4619 chipset,what should we be looking for on our loaders? I can hardly see the lettering on the chips in my loader but I can read the silkscreening next to them. Are we loking for U6,U7?My loader has U5(very small w/8 legs) U6 and U7 w/16 legs .I think these are what to look for correct?
Does someone have any good high res pictures of these chips?Thinking of doing a new mod.I need to replace the pot too so why not?

[GH24]

different loaders are set up different ways, the 4619's have 16 legs, but don't be confused because in my loader my MAX232 chip also has 16 legs. heres a pic of my vec tech , the 2 chips are up top side by side on my loader labled U7 & U8 these are 4053's but look the same as 4619's . i guiss the only way to tell is to just try & look for 4053 or 4619 someware on those chips . hope this helps a bit good luck. & if u do have 4053's than u can always replace them with the 4619's if u have soldering skills because that's what i'm going to do with mine. but i'm not sure yet if u have to replace the two 4053 chips with only one 4619.so as soon as i find out i'll let u know...http://server2.uploadit.org/files/GH242424-loader.jpg

[Pyotr]

I notice the chips on that loader are 4053N.Have you ever seen 4053D chips at U6 and U7?I think thats what the print says.
Pretty sure they have to be replaced by 2 4619. How would you go about getting the old chips off. The legs are surface mount.They don't go all the way through. Would you cut the legs,then de solder? Also,I think I need a smaller soldering iron.

[seaboard18]

I notice the chips on that loader are 4053N.Have you ever seen 4053D chips at U6 and U7?I think thats what the print says.
Pretty sure they have to be replaced by 2 4619. How would you go about getting the old chips off. The legs are surface mount.They don't go all the way through. Would you cut the legs,then de solder? Also,I think I need a smaller soldering iron.


If you plan to replace those chips, its best to use a dremal tool and cut the pins next to the body of the chip. Install a 16 pin socket for each IC, soldered to the existing legs that are left on the pc board. After you are sure that all your connections are solid, you can make the sockets more sturdy using Quick JB Weld epoxy, applied to each row of 8 pins. Now you can change them back and forth at anytime in the future.

I was unable to find much out about the HC4619, except it is used for ISO apps. Here is the datasheet for the HC4053N.

Part: 74HC4053N

Category: category

Description: 74HC/HCT4053; Triple 2-channel Analog Multiplexer/demultiplexer;; Package: SOT109-1 (SO16), SOT338-1 (SSOP16), SOT38-4 (DIP16), SOT403-1 (TSSOP16)

Datasheet text preview:
INTEGRATED CIRCUITS

DATA SHEET
For a complete data sheet, please also download:
· The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications · The IC06 74HC/HCT/HCU/HCMOS Logic Package Information · The IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines

74HC/HCT4053 Triple 2-channel analog multiplexer/demultiplexer
Product specification File under Integrated Circuits, IC06 December 1990

Philips Semiconductors

Product specification

Triple 2-channel analog multiplexer/demultiplexer
FEATURES · Low "ON" resistance: 80 (typ.) at VCC - VEE = 4.5 V 70 (typ.) at VCC - VEE = 6.0 V 60 (typ.) at VCC - VEE = 9.0 V · Logic level translation: to enable 5 V logic to communicate with ± 5 V analog signals · Typical "break before make" built in · Output capability: non-standard · ICC category: MSI GENERAL DESCRIPTION The 74HC/HCT4053 are high-speed Si-gate CMOS devices and are pin compatible with the "4053" of the "4000B" series. They are specified in compliance with JEDEC standard no. 7A. QUICK REFERENCE DATA VEE = GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns

74HC/HCT4053
The 74HC/HCT4053 are triple 2-channel analog multiplexers/demultiplexers with a common enable input (E). Each multiplexer/demultiplexer has two independent inputs/outputs (nY0 and nY1), a common input/output (nZ) and three digital select inputs (S1 to S3). With E LOW, one of the two switches is selected (low impedance ON-state) by S1 to S3. With E HIGH, all switches are in the high impedance OFF-state, independent of S1 to S3. VCC and GND are the supply voltage pins for the digital control inputs (S1, to S3, and E). The VCC to GND ranges are 2.0 to 10.0 V for HC and 4.5 to 5.5 V for HCT. The analog inputs/outputs (nY0 and nY1, and nZ) can swing between VCC as a positive limit and VEE as a negative limit. VCC - VEE may not exceed 10.0 V. For operation as a digital multiplexer/demultiplexer, VEE is connected to GND (typically ground).

TYPICAL SYMBOL tPZH/ tPZL PARAMETER turn "ON" time E to VOS Sn to VOS tPHZ/ tPLZ turn "OFF" time E to VOS Sn to VOS CI CPD CS input capacitance power dissipation capacitance per switch notes 1 and 2 max. switch capacitance independent (Y) common Notes 1. CPD is used to determine the dynamic power dissipation (PD in µW): PD = CPD × VCC2 × fi+ {(CL+CS) × VCC2 × fo} where: fi = input frequency in MHz; fo = output frequency in MHz {(CL+CS) × VCC2 × fo} = sum of outputs CL = output load capacitance in pF; CS = max. switch capacitance in pF VCC = supply voltage in V 2. For HC the condition is VI = GND to VCC For HCT the condition is VI = GND to VCC - 1.5 V December 1990 2 (Z) 5 8 5 8 pF pF 18 17 3.5 36 20 19 3.5 36 ns ns pF pF CONDITIONS HC CL = 15 pF; RL = 1 k; VCC = 5 V 17 21 23 21 ns ns HCT UNIT

Philips Semiconductors

Product specification

Triple 2-channel analog multiplexer/demultiplexer
ORDERING INFORMATION See "74HC/HCT/HCU/HCMOS Logic Package Information". PIN DESCRIPTION PIN NO. 2, 1 5, 3 6 7 8 11, 10, 9 12, 13 14, 15, 4 16 SYMBOL 2Y0 to, 2Y1 3Y0 to, 3Y1 E VEE GND S1 to S3 1Y0, 1Y1 1Z to 3Z VCC NAME AND FUNCTION independent inputs/outputs independent inputs/outputs enable input (active LOW) negative supply voltage ground (0 V) select inputs independent inputs/outputs common inputs/outputs positive supply voltage

74HC/HCT4053

Fig.1 Pin configuration.

Fig.2 Logic symbol.

Fig.3 IEC logic symbol.

December 1990

3

Philips Semiconductors

Product specification

Triple 2-channel analog multiplexer/demultiplexer
APPLICATIONS · Analog multiplexing and demultiplexing · Digital multiplexing and demultiplexing · Signal gating FUNCTION TABLE INPUTS CHANNEL ON E L L H Note 1. H = HIGH voltage level L = LOW voltage level X = don't care Sn L H X nY0 - nZ nY1 - nZ none

74HC/HCT4053

Fig.4 Functional diagram.

Fig.5 Schematic diagram (one switch).

December 1990

4

Philips Semiconductors

Product specification

Triple 2-channel analog multiplexer/demultiplexer
RATINGS Limiting values in accordance with the Absolute Maximum System (IEC 134) Voltages are referenced to VEE = GND (ground = 0 V) SYMBOL VCC ±IIK ±ISK ±IS ±IEE ±ICC; ±IGND Tstg Ptot PARAMETER DC supply voltage DC digital input diode current DC switch diode current DC switch current DC VEE current DC VCC or GND current storage temperature range power dissipation per package plastic DIL plastic mini-pack (SO) PS power dissipation per switch 750 500 100 mW mW mW -65 MIN. -0.5 MAX. +11.0 20 20 25 20 50 +150 UNIT V mA mA mA mA mA °C

74HC/HCT4053

CONDITIONS for VI VCC + 0.5 V for VS VCC + 0.5 V for -0.5 V < VS < VCC + 0.5 V

for temperature range: -40 to + 125 °C 74HC/HCT above + 70 °C: derate linearly with 12 mW/K above + 70 °C: derate linearly with 8 mW/K

Note to ratings To avoid drawing VCC current out of terminals nZ, when switch current flows in terminals nYn, the voltage drop across the bidirectional switch must not exceed 0.4 V. If the switch current flows into terminals nZ, no VCC current will flow out of terminals nYn. In this case there is no limit for the voltage drop across the switch, but the voltages at nYn and nZ may not exceed VCC or VEE. RECOMMENDED OPERATING CONDITIONS 74HC SYMBOL PARAMETER min. VCC VCC VI VS Tamb Tamb DC supply voltage VCC-GND DC supply voltage VCC-VEE DC input voltage range DC switch voltage range operating ambient temperature range operating ambient temperature range 2.0 2.0 GND VEE -40 -40 typ. 5.0 5.0 max. 10.0 10.0 VCC VCC +85 min. typ. 4.5 2.0 GND VEE -40 5.0 5.0 max. 5.5 10.0 VCC VCC +85 +125 V V V V °C see DC and AC +125 -40 1000 500 400 250 °C
CHARACTERISTICS

74HCT UNIT CONDITIONS see Figs 6 and 7 see Figs 6 and 7

tr, tf

input rise and fall times

6.0

6.0

500

ns

VCC = 2.0 V VCC = 4.5 V VCC = 6.0 V VCC = 10.0 V

December 1990

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