HEF40373BT,652

HEF40373B Octal transparent latch with 3-state outputs Rev. 4 29 June 2018 Product data sheet 1 General description The HEF40373B is an 8-bit transparent latch with 3-state buffered outputs. The output stages have high current output capability suitable for driving highly capacitive loads. The latch outputs follow the data inputs when the latch enable (E) is HIGH. When E is LOW, the data that meets the set-up times is latched. The 3-state outputs are controlled by the output enable input EO. A HIGH on EO causes the outputs to assume a high impedance OFF-state. The device features hysteresis on the E input to improve noise rejection. Schmitt-trigger action in the E input makes the circuit highly tolerant to slower input rise and fall times. 2 Features and benefits Octal bus interface 3-state buffers Fully static operation 5 V, 10 V, and 15 V parametric ratings Standardized symmetrical output characteristics Specified from 40 C to +85 C 3 Ordering information Table 1.Ordering information Type number Package Temperature range Name Description Version HEF40373BT -40 C to +85 C SO20 plastic small outline package 20 leads SOT163-1 body width 7.5 mmNexperia HEF40373B Octal transparent latch with 3-state outputs 4 Functional diagram 11 E 3 2 D0 O0 1 4 5 EO EN D1 O1 11 E C1 7 6 D2 O2 8 9 3 2 D3 O3 D0 1D O0 4 5 13 12 D1 O1 D4 O4 7 6 D2 O2 14 15 8 9 D5 O5 D3 O3 17 16 13 12 D6 O6 D4 O4 14 15 18 19 D5 O5 D7 O7 17 16 D6 O6 EO 18 19 D7 O7 1 aaa-028685 aaa-028686 Figure 1.Logic symbol Figure 2.IEC logic symbol D0 O0 3 2 D1 O1 4 5 D2 O2 7 6 D3 O3 8 9 LE LATCH 3-STATE D4 O4 1 TO 8 OUTPUTS 13 12 D5 O5 14 15 D6 O6 17 16 LE D7 O7 18 19 LE E D Q 11 EO 1 aaa-028687 LE 001aae051 Figure 3.Functional diagram Figure 4.Logic diagram (one latch) D0 D1 D2 D3 D4 D5 D6 D7 D Q D Q D Q D Q D Q D Q D Q D Q LATCH LATCH LATCH LATCH LATCH LATCH LATCH LATCH 1 2 3 4 5 6 7 8 LE LE LE LE LE LE LE LE LE LE LE LE LE LE LE LE E EO O0 O1 O2 O3 O4 O5 O6 O7 aaa-028688 Figure 5.Logic diagram HEF40373B All information provided in this document is subject to legal disclaimers. Nexperia B.V. 2018. All rights reserved. Product data sheet Rev. 4 29 June 2018 2 / 15