Motor de Búsqueda de Datasheet de Componentes Electrónicos |
|
74ABT16899DL Datasheet(PDF) 2 Page - NXP Semiconductors |
|
74ABT16899DL Datasheet(HTML) 2 Page - NXP Semiconductors |
2 / 16 page Philips Semiconductors Product specification 74ABT16899 74ABTH16899 18-bit latched transceiver with 16-bit parity generator/checker (3-State) 2 1998 Feb 25 853-1960 19018 FEATURES • Symmetrical (A and B bus functions are identical) • Selectable generate parity or ”feed-through” parity for A-to-B and B-to-A directions • Independent transparent latches for A-to-B and B-to-A directions • Selectable ODD/EVEN parity • Continuously checks parity of both A bus and B bus latches as ERRA and ERRB • Open-collector ERR output • Ability to simultaneously generate and check parity • Can simultaneously read/latch A and B bus data • Output capability: +64 mA/–32mA • Latch-up protection exceeds 500mA per Jedec Std 17 • ESD protection exceeds 2000 V per MIL STD 883 Method 3015 and 200 V per Machine Model • Power up 3-State • Power-up reset • Live insertion/extraction permitted • Bus-hold data inputs eliminate the need for external pull-up resistors to hold unused inputs DESCRIPTION The 74ABT/H16899 is a 16-bit to 16-bit parity transceiver with separate transparent latches for the A bus and B bus. Either bus can generate or check parity. The parity bit can be fed-through with no change or the generated parity can be substituted with the SEL input. Parity error checking of the A and B bus latches is continuously provided with ERRA and ERRB, even with both buses in 3-State. The 74ABT/H16899 features independent latch enables for the A and B bus latches, a select pin for ODD/EVEN parity, and separate error signal output pins for checking parity. FUNCTIONAL DESCRIPTION The 74ABT/H16899 has three principal modes of operation which are outlined below. All modes apply to both the A-to-B and B-to-A directions. Transparent latch, Generate parity, Check A and B bus parity: Bus A (B) communicates to Bus B (A), parity is generated and passed on to the B (A) Bus as BPAR (APAR). If LEA and LEB are High and the Mode Select (SEL) is Low, the parity generated from A0-A7 and B0-B7 can be checked and monitored by ERRA and ERRB. (Fault detection on both input and output buses.) Transparent latch, Feed-through parity, Check A and B bus parity: Bus A (B) communicates to Bus B (A) in a feed-through mode if SEL is High. Parity is still generated and checked as ERRA and ERRB and can be used as an interrupt to signal a data/parity bit error to the CPU. Latched input, Generate/Feed-through parity, Check A (and B) bus parity: Independent latch enables (LEA and LEB) allow other permutations of: • Transparent latch / 1 bus latched / both buses latched • Feed-through parity / generate parity • Check in bus parity / check out bus parity / check in and out bus parity QUICK REFERENCE DATA SYMBOL PARAMETER CONDITIONS Tamb = 25°C; GND = 0V TYPICAL UNIT tPLH tPHL Propagation delay An to Bn or Bn to An CL = 50pF; VCC = 5V 2.7 ns tPLH tPHL Propagation delay An to ERRA CL = 50pF; VCC = 5V 5.0 ns CIN Input capacitance VI = 0V or VCC 4 pF CI/O Output capacitance Outputs disabled; VO = 0V or VCC 7 pF ICCZ Quiescent supply current Outputs disabled; VCC =5.5V 500 µA ICCL Quiescent supply current Output Low; VCC = 5.5V 10.5 mA ORDERING INFORMATION PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA DWG NUMBER 56-Pin Plastic SSOP Type III –40 °C to +85°C 74ABT16899 DL BT16899 DL SOT371-1 56-Pin Plastic TSSOP Type II –40 °C to +85°C 74ABT16899 DGG BT16899 DGG SOT364-1 56-Pin Plastic SSOP Type III –40 °C to +85°C 74ABTH16899 DL BH16899 DL SOT371-1 56-Pin Plastic TSSOP Type II –40 °C to +85°C 74ABTH16899 DGG BH16899 DGG SOT364-1 |
Número de pieza similar - 74ABT16899DL |
|
Descripción similar - 74ABT16899DL |
|
|
Enlace URL |
Política de Privacidad |
ALLDATASHEET.ES |
¿ALLDATASHEET es útil para Ud.? [ DONATE ] |
Todo acerca de Alldatasheet | Publicidad | Contáctenos | Política de Privacidad | Intercambio de Enlaces | Lista de Fabricantes All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |