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M-986-2A1PL Datasheet(PDF) 2 Page - Clare, Inc. |
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M-986-2A1PL Datasheet(HTML) 2 Page - Clare, Inc. |
2 / 13 page Electrical Characteristics/Temperature Range Parameter Test ConditionsMin Typ Max Unit I CC Supply current f = 20.5 MHz, V CC = 5.5V, - 50 75 mA T A = 0˚ to 70 ˚C V OH High-level output voltage I OH = MAX 2.4 3 - V I OH = 20 µ A V CC -0.4 - - V V OL Low-level output voltage I OL = MAX - 0.3 0.6 V I OZ Off-state output current V CC = MAX VO = 2.4 V - - 20 µA VO = 0.4 V - - -20 µA I I Input current V I = VSS to VCC Except CLKIN - - ±20 µA CLKIN - - ±50 µA C I Input capacitance Data bus f = 1 MHz, all other pins 0 V - 25 - pF All others - 15 - pF C O Output capacitance Data bus - 25 - pF All others - 10 - pF Supply voltage range, V CC -0.3 V to 7 V Input voltage range -0.3 V to 15 V Output voltage range -0.3 V to 15 V Ambient air temperature range 0˚ to 150˚C Storage temperature range -45˚C to 150˚C www.clare.com M-986-2A1 Rev. 3 Absolute Maximum Ratings are stress ratings. Stresses in excess of these ratings can cause permanent damage to the device. Functional operation of the device at these or any other conditions beyond those indicated in the opera- tional sections of this data sheet is not implied. Exposure of the device to the absolute maximum ratings for an extend- ed period may degrade the device and effect its reliability. 2 Absolute Maximum Ratings Over Specified Temperature Range When binary input/output is selected, the M-986-2A1 encodes the received R1 MF tone pair into a 4 bit binary format. The digital input to the M-986-2A1 that selects the transmitted R1 MF tone pair must also be coded in a 4 bit binary format. Enable/Disable Channel (ENC): When a channel is disabled, the receiver does not process its codec input for R1 MF tones, and the transmitter does not respond to transmit commands. If a transmit com- mand is given while the channel is enabled, the “tone off” command must be given before the channel is dis- abled. Disabling the channel does not automatically shut off the transmitter. When a channel is enabled, the receiver and transmitter for that channel function normally. Long/Short KP Tone Detection Time (KPL): When long KP tone detection is selected, the minimum on time for the KP tone to be detected is 55 milliseconds. When short KP tone detection is selected, the mini- mum on time for the KP tone to be detected is 30 mil- liseconds (the same as the minimum on time for the rest of the MF tones). Enable MF Tone Detection After Reception of KP (KPEN): When this feature is enabled, MF tone detec- tion is enabled after reception of the KP tone, and dis- abled after reception of ST, ST1, ST2, or ST3 tones. When this feature is disabled, MF tone detection is always enabled. Select A or µ-law input/output (AMU) for A-law encoding, this bit is set to a 1, for µ-law encoding it is set to 0. Function Description The M-986-2A1 can be set up for various modes of operation by writing two configuration bytes to the coprocessor port. The format of the two configuration bytes is shown in the Configuration Table on page 3 and the configuration options are described in the fol- lowing paragraphs. Configuration Options External/Internal Codec Clock (ECLK): If external codec clocking is selected, an external clocking source provides an 8 kHz transmit framing clock and an 8 kHz receive framing clock. It also provides a serial bit clock with a frequency that is a multiple of 8 kHz between 216 kHz and 2.496 MHz for exchange of data via the serial ports. When internal codec clocking is selected, the M-986-2A1 provides an 8 kHz framing clock and a 2.048 MHz serial bit clock. 2 of 6/Binary Input/Output (IOM): When the 2-of-6 input/output is selected, the M-986-2A1 encodes the received R1 MF tone pair into a 6-bit format, where each bit represents one of the six possible frequencies. A logic high level indicates the presence of a frequen- cy. The digital input to the M-986-2A1 that selects the transmitted R1 MF tone pair must also be coded in the 2-of-6 format. |
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