File name 40373.pdfINTEGRATED CIRCUITS
DATA SHEET
For a complete data sheet, please also download:
· The IC04 LOCMOS HE4000B Logic Family Specifications HEF, HEC · The IC04 LOCMOS HE4000B Logic Package Outlines/Information HEF, HEC
HEF40373B MSI Octal transparent latch with 3-state outputs
Product specification File under Integrated Circuits, IC04 January 1995
Philips Semiconductors
Product specification
Octal transparent latch with 3-state outputs
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
HEF40373B MSI
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. The HEF40373B is pin and functionally compatible with the TTL `373' device. Supply voltage range: 3 to 15 V.
Fig.1 Functional diagram.
Fig.2 Pinning diagram.
PINNING HEF40373BP(N): 20-lead DIL; plastic (SOT146-1) HEF40373BD(F): HEF40373BT(D): 20-lead DIL; ceramic (cerdip) (SOT152) 20-lead SO; plastic (SOT163-1) ( ): Package Designator North America FAMILY DATA, IDD LIMITS category MSI See Family Specifications D0 to D7 E EO O0 to O7 data inputs latch enable input output enable input (active LOW) 3-state buffered outputs
January 1995
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Octal transparent latch with 3-state outputs HEF40373B MSI
Product specification
Philips Semiconductors
Product specification
Octal transparent latch with 3-state outputs
FUNCTION TABLE INPUTS OPERATING MODES EO enable & read register latch & read register latch register & disable outputs Notes 1. H = HIGH state (the more positive voltage) h = HIGH state (one set-up time prior to the HIGH-to-LOW enable transition) L = LOW state (the less positive voltage) I = LOW state (one set-up time prior to the HIGH-to-LOw enable transition) Z = high impedance OFF-state L L L L H H E H H L L L L Dn L H I h I h INTERNAL REGISTER L H L H L H
HEF40373B MSI
OUTPUTS O0 TO O7 L H L H Z Z
January 1995
4
Philips Semiconductors
Product specification
Octal transparent latch with 3-state outputs
RATINGS Limiting v |