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CBT3257 Quad 1-of-2 multiplexer/demultiplexer
Product data Supersedes data of 27 Sep 2002 2002 Dec 13
Philips Semiconductors
Philips Semiconductors
Product data
Quad 1-of-2 multiplexer/demultiplexer
CBT3257
FEATURES
• 5 Ω switch connection between two ports • TTL-compatible input levels • Minimal propagation delay through the switch • Latch-up protection exceeds 500 mA per JESD78 • ESD protection exceeds 2000 V HBM per JESD22-A114,
200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101
PIN CONFIGURATION
S 1B1 1B2 1A 2B1 2B2 2A 1 2 3 4 5 6 7 8 16 VCC 15 OE 14 4B1 13 4B2 12 4A 11 3B1 10 3B2 9 3A
DESCRIPTION
The CBT3257 is a quad 1-of-2 high-speed TTL-compatible multiplexer/demultiplexer. The low on resistance of the switch allows inputs to be connected to outputs without adding propagation delay or generating additional ground bounce noise. Output Enable (OE) and select-control (S) inputs select the appropriate B1 and B2 outputs for the A-input data. The CBT3257 is characterized for operation from -40 to +85 °C.
GND
SA00533
PIN DESCRIPTION
PIN NUMBER 1 2, 3, 5, 6, 10, 11, 13, 14 4, 7, 9, 12 8 15 16 SYMBOL S 1B1, 1B2, 2B1, 2B2 3B1, 3B2 4B1, 4B2 1A, 2A, 3A, 4A GND OE VCC NAME AND FUNCTION Select-control input B outputs A inputs Ground (0 V) Output enable Positive supply voltage
ORDERING INFORMATION
PACKAGES 16-pin plastic SO 16-pin plastic SSOP 16-pin plastic SSOP (QSOP) 16-pin plastic TSSOP TEMPERATURE RANGE -40 to 85 °C -40 to 85 °C -40 to 85 °C -40 to 85 °C ORDER CODE CBT3257D CBT3257DB CBT3257DS CBT3257PW TOPSIDE MARK CBT3257D CT3257 CBT3257 CBT3257 DWG NUMBER SOT109-1 SOT338-1 SOT519-1 SOT403-1
Standard packing quantities and other packaging data is available at www.philipslogic.com/packaging.
2002 Dec 13
2
Philips Semiconductors
Product data
Quad 1-of-2 multiplexer/demultiplexer
CBT3257
LOGIC DIAGRAM (positive logic)
1A 4 2 1B1
3
1B2
2A
7
5
2B1
6
2B2
3A
9
11
3B1
10
3B2
4A
12
14
4B1
13
4B2
S
1
OE
15
SA00638
FUNCTION TABLE
INPUTS OE L L H S L H X FUNCTION A port = B1 port A port = B2 port Disconnect
2002 Dec 13
3
Philips Semiconductors
Product data
Quad 1-of-2 multiplexer/demultiplexer
CBT3257
ABSOLUTE MAXIMUM RATINGS1
SYMBOL VCC VI IK Tstg PARAMETER DC supply voltage DC input voltage2 Continuous channel current Input clamp current Storage temperature range VI/O < 0 CONDITIONS RATING -0.5 to +7.0 -0.5 to +7.0 128 -50 -65 to +150 UNIT V V mA mA °C
NOTES: 1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. 2. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
RECOMMENDED OPERATING CONDITIONS
SYMBOL VCC VIH VIL Tamb DC supply voltage High-level input voltage Low-level Input voltage Operating free-air temperature range PARAMETER LIMITS MIN 4.5 2.0 — -40 MAX 5.5 — 0.8 +85 UNIT V V V °C
NOTE: 1. All unused control inputs of the device must be held at VCC or GND to ensure proper device operation.
DC ELECTRICAL CHARACTERISTICS
LIMITS SYMBOL VIK VP II ICC ∆ICC CI CIO(OFF) PARAMETER Input clamp voltage Pass voltage Input leakage current Quiescent supply current Additional supply current per input pin2 Control pins Power-off leakage current A port B port TEST CONDITIONS VCC = 4.5 V; II = -18 mA VI = VCC = 5.0 V; I/O = -100 mA VCC = 5.5 V; VI = GND or 5.5 V VCC = 5.5 V; IO = 0, VI = VCC or GND VCC = 5.5 V, one input at 3.4 V, other inputs at VCC or GND VI= 3 V or 0 VO = 3 V or 0; OE = VCC VO = 3 V or 0; OE = VCC VCC = 4.5 V; VI = 0V; II = 64 mA ron3 On-resistance VCC = 4.5 V; VI = 0V; II = 30 mA VCC = 4.5 V; VI = 2.4 V; II = 15 mA Tamb = -40 to +85 °C MIN — 3.4 — — — — — — — — — TYP1 — 3.6 — — — 3.3 9.9 6.4 5 5 10 MAX -1.2 3.9 ±1 3 2.5 — — — 7 7 15 V V µA µA mA pF pF pF Ω Ω Ω UNIT
NOTES: 1. All typical values are at VCC = 5 V, Tamb = 25 °C. 2. This is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND 3. Measured by the voltage drop between the A and the B terminals at the indicated current through the switch. On-state resistance is determined by the lowest voltage of the two (A or B) terminals.
2002 Dec 13
4
Philips Semiconductors
Product data
Quad 1-of-2 multiplexer/demultiplexer
CBT3257
AC CHARACTERISTICS
Tamb = -40 to +85 °C; CL = 50 pF LIMITS SYMBOL tpd tpd ten tdis PARAMETER Propagation delay1 Propagation delay Output enable time to High and Low level Output disable time from High and Low level FROM (INPUT) A or B S OE S OE S TO (OUTPUT) B or A A A or B B A or B B VCC = +5.0 V ±0.5 V MIN — 1.6 1.8 1.6 2.2 1.0 MAX 0.25 5.0 5.1 5.2 5.5 5.0 ns ns ns ns ns ns UNIT
NOTE: 1. The propagation delay is the ca.