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74ABT657PW Datenblatt(PDF) 8 Page - NXP Semiconductors |
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74ABT657PW Datenblatt(HTML) 8 Page - NXP Semiconductors |
8 / 17 page 74ABT657_3 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2010. All rights reserved. Product data sheet Rev. 03 — 15 March 2010 8 of 17 NXP Semiconductors 74ABT657 Octal transceiver with parity generator/checker; 3-state 10. Dynamic characteristics [1] These delay times reflect the 3-state recovery time only and do not include the delay through the buffers and the parity check circuitry which affect the ERROR output. To ensure valid information at the ERROR pin, time must be allowed for the signal to propagate through the drivers (B to A), through the parity check circuitry (same as A to PARITY), and to the ERROR output. Valid data at the ERROR pin ≥ (B to A) + (A to PARITY). Table 7. Dynamic characteristics GND = 0 V; for test circuit, see Figure 9. Symbol Parameter Conditions 25 °C; V CC = 5.0 V −40 °C to +85 °C; VCC = 5.0 V ± 0.5 V Unit Min Typ Max Min Max tPLH LOW to HIGH propagation delay An to Bn or Bn to An; see Figure 6 1.1 2.5 4.1 1.1 4.6 ns An to PARITY; see Figure 5 and 6 2.5 5.1 6.7 2.5 8.1 ns ODD/EVEN to PARITY and ERROR; see Figure 5 and 6 1.7 3.5 4.6 1.7 5.3 ns Bn to ERROR; see Figure 5 and 6 3.9 7.3 10.2 3.9 12.3 ns PARITY to ERROR; see Figure 5 and 6 2.7 4.5 5.9 2.7 7.7 ns tPHL HIGH to LOW propagation delay An to Bn or Bn to An; see Figure 6 1.2 3.0 3.9 1.2 4.3 ns An to PARITY; see Figure 5 and 6 2.8 5.0 7.4 2.8 8.9 ns ODD/EVEN to PARITY and ERROR; see Figure 5 and 6 1.9 3.7 5.1 1.9 5.8 ns Bn to ERROR; see Figure 5 and 6 4.0 7.9 10.5 4.0 12.9 ns PARITY to ERROR; see Figure 5 and 6 3.2 5.2 6.7 3.2 8.1 ns tPZH OFF-state to HIGH propagation delay see Figure 7 and 8 [1] 1.3 3.6 5.5 1.3 6.5 ns tPZL OFF-state to LOW propagation delay see Figure 7 and 8 [1] 1.9 4.2 5.3 1.9 6.5 ns tPHZ HIGH to OFF-state propagation delay see Figure 7 and 8 2.4 3.6 5.6 2.4 6.2 ns tPLZ LOW to OFF-state propagation delay see Figure 7 and 8 2.2 3.4 7.3 2.2 7.8 ns |
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