TCA270S,Top sales TCA270S,TCA270S DATASHEET -ICSTOCK

Notes:
1 Due to space limitation. the chip
is represented by a general (smaller)
case outline drawing rather than
showing all 44 leads.
2 Datums L, M, N. and P determine where
the top of the lead shoulder exits plastic
body at mold parting line
3 DIM Gl. true position to be measured
at Datum T. Seating Plane
4 DIM R and U do not include mold
protusion Allowable mold protusion is
0 25 (0 010) per side
5 Dimensioning and tolerancing per Ansi
Y14 5M, 1982
6 Controlling dimension: inch
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DC Life Test: 140% of rated voltage for 250 hours
@ + 1250C. No open or short circuits. No visible damage
Maximum A Cap.: + 5%. Minimum I.R. = 30% of initial
limit. Maximum D.F. = 1.5%.
TCA270S datasheet

Data is transferred from the data buffer memory to the output buffer
for transmission as required by the 1553 data bus.

If the 1760 checksum is enabled, the checksum word will be

automatically generated and transmitted as the last data word. For
example,ifa Command is received to transmit five data words the
subsystem can load four or five data words. If the subsystem loads
four data words the device will generate the last data word for
transmission. Ifthe subsystem loads five data words the device will
ignore the last data word and transmit the internally generated
checksum word instead.
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. Designed to International (IEC) Standards for use globally.
. Meets the IEC 60127-2, Sheet 6 specification for Time Lag Fuses.
. Available in Cartridge and Axial Lead Format.
. Available in ratings of l.0 t0 6.3 amperes.
. Enhanced Breaking Capacity, High l2t
. RoHS compliant and Lead-Free version available, add XP suffix to
standard catalog number
TCA270S pdf

When the 82C37A is in the Idle cycle, and a software
request or an unmasked channel requests a DMA service,
the device will issue HRQ to the microprocessor and enter
the Active cycle. It is in this cycle that the DMA service will
take place, in one of four modes: